Answer: 220 meters in 1 minute
Step-by-step explanation:
if harper can run 2200 meters in 10 min then that means you can run 220 in 1 min
2200/10 = 220
Answer:
220
Step-by-step explanation:
2200/10 is 220
You play a game of dice at the state fair, but suspect the dice may have been rigged. You observe the game owner rolling the dice 78 times and note the following results:
Face "1" "2" "3" "4" "5" "6"
Observed count 8 13 18 14 19 6
(a) Which hypotheses should be used to test if the dice are fair:
Identify H0:
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 1/6, implying the dice are unfair.
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 0, implying the dice are fair.
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 1/6, implying the dice are fair.
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 0, implying the dice are unfair.
Identify Ha:
-Ha: every p ≠ 1/6, implying the dice are unfair.
-Ha: at least one p≠ 1/6, implying the dice are unfair.
-Ha: every p ≠ 1/6, implying the dice are fair.
-Ha: at least one p ≠ 1/6, implying the dice are fair.
(b) What is the expected count for each side of the dice?
(c) Is the cell count condition met?
-No, because some cells have less than 10 observed counts.
-Yes, because the expected cell count is at least 5 for all cells.
-Yes, because the expected cell count is close to the observed cell count for all cells.
-No, because some cells have less than 30 observed counts.
(d) Calculate the contribution to the test statistic for the dice side with number "1": (Use 4 decimals):
(e) The full test statistic is χ2 = 10.462. What is the P-value? (Use 4 decimals.)
(f) What is the appropriate test conclusion, for α = 0.05?
-There is sufficient evidence the dice are unfair.
-There is insufficient evidence the dice are unfair.
-There is insufficient evidence the dice are fair.
-There is sufficient evidence the dice are fair.
(a) H0: p1 = p2 = p3 = p4 = p5 = p6 = 1/6, implying the dice are fair.
(b) The expected count for each side of the dice is 13
(c) Yes, because the expected cell count is at least 5 for all cells.
Hypothesis :
In statistics, hypothesis testing is used to identify the variance in the group of data that results from genuine variation. Based on the presumptions, the sample data are taken from the population parameter. The hypothesis can be divided into many categories. A hypothesis is described in statistics as a formal statement that explains the relationship between two or more variables belonging to the specified population. It aids the researcher in converting the stated issue into an understandable justification for the study's findings. It provides examples of various experimental designs and guides the investigation of the research procedure.
Complete question:
You play a game of dice at the state fair, but suspect the dice may have been rigged. You observe the game owner rolling the dice 78 times and note the following results:
Face "1" "2" "3" "4" "5" "6"
Observed count 8 13 18 14 19 6
(a) Which hypotheses should be used to test if the dice are fair:
Identify H0:
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 1/6, implying the dice are unfair.
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 0, implying the dice are fair.
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 1/6, implying the dice are fair.
-H0: p1 = p2 = p3 = p4 = p5 = p6 = 0, implying the dice are unfair.
Identify Ha:
-Ha: every p ≠ 1/6, implying the dice are unfair.
-Ha: at least one p≠ 1/6, implying the dice are unfair.
-Ha: every p ≠ 1/6, implying the dice are fair.
-Ha: at least one p ≠ 1/6, implying the dice are fair.
(b) What is the expected count for each side of the dice?
(c) Is the cell count condition met?
-No, because some cells have less than 10 observed counts.
-Yes, because the expected cell count is at least 5 for all cells.
-Yes, because the expected cell count is close to the observed cell count for all cells.
-No, because some cells have less than 30 observed counts.
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help
The graph of g(x) is obtained by reflecting the graph of f(x)=2|x| over the x-axis.
Which equation describes g(x)?
g(x)=−|x+2|
g begin argument x end argument equals negative begin absolute value x plus 2 end absolute value.
g(x)=|x+2|
g begin argument x end argument equals begin absolute value x plus 2end absolute value.
g(x)=−2|x|
g begin argument x end argument equals negative 2 begin absolute value x end absolute value.
g(x)=2|x|
Responses
g(x)=−|x+2|
g begin argument x end argument equals negative begin absolute value x plus 2 end absolute value.
g(x)=|x+2|
g begin argument x end argument equals begin absolute value x plus 2end absolute value.
g(x)=−2|x|
g begin argument x end argument equals negative 2 begin absolute value x end absolute value.
g(x)=2|x|
An equation which describe the function g(x) after reflecting the graph of function f(x)=2|x| over the x-axis is: C. g(x) = −2|x|. g begin argument x end argument equals negative 2 begin absolute value x end absolute value.
What is a reflection?In Geometry, a reflection can be defined as a type of transformation which moves every point of the object by producing a flipped but mirror image of the geometric figure.
What is a reflection across the x-axis?In Mathematics, a reflection across the x-axis would maintain the same x-coordinate while the sign of the y-coordinate would change from positive to negative. Therefore, a reflection across the x-axis is given by this transformation rule: (x, y) → (x, -y).
By applying a reflection across the x-axis to the function, we have;
f(x) = 2|x|
g(x) = -f(x)
g(x) = -(2|x|)
g(x) = -2|x|
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What is the value of this expression when a = 4, b = -5, and c = -7?
a + 2bc
3a
Answer:
Step-by-step explanation:
a = 4, b = -5, and c = -7
for a + 2bc
4 + 2(-5)(-7)
4 + 70
74
for 3a
3(4)
12
I'm not sure if the 2 parts are connected but if you add them, the answer is 86. If you subtract them, the answer is 62. If you multiply them, the answer is 888. If you divide them, the answer is 7/6.
Could you please give me brainliest? Thank you!
Please Help!!!! 50 pts
Answer:
This may not help but, If you have any notes try using notes to solve this.
Or you can maybe ask your teacher to go over it when you both have free time or maybe have your teacher do a practice problem before or after class! That is what I would do but I hope it helps you! Good luck!
Answer:
A.
Step-by-step explanation:
Show that Φ(u,v)=(7u+4,u−v,13u+v) parametrizes the plane 2x−y−z=8. Then: (a) Calculate Tu , Tv, and n(u,v). (b) Find the area of S=Φ(D), where D=(u,v):0≤u≤5,0≤v≤6. (c) Express f(x,y,z)=yz in terms of u and v and evaluate ∬sf(x,y,z)ds(a) Tu= , Tv= , n(u,v)=_______________(b) Area(S)=_______(c) ∬sf(x,y,z)ds=___________
Answer:
Step-by-step explanation:
1.Φ(u,v) gives the parametrization with its x, y, and z components. So, x=7u+4, y=u-v, and z=13u+v. We can use this to get the tangent vectors by taking the respective partial derivatives. Tu=<7, 1, 13> by taking the u derivatives of the components and Tv=<0, -1, 1> by taking the v derivatives of the components.
2. Taking the cross product of Tu and Tv will give the normal vector n(u,v), which is <14, -7, -7>
3. To find Area(S), you have to multiply the area of D by the magnitude of the normal vector from the previous step. D is the region defined by 0<=u<=5 and 0<=v<=6, so the area of D is 5*6=30. Multiply this by the magnitude of the normal vector to find that Area(S)=30sqrt(294)
4. To integrate, we first must put the initial function in terms of the parameters we found in the first step. Replace y with u-v and z with 13u+v. Next, multiply this integrand by the magnitude of the normal vector (sqrt294) and apply the given bounds for u (0<=u<=5) and v (0<=v<=6). From here the problem can be integrated like any other double integral, the final answer being 190sqrt(294)
geoff is about to open a restaurant. he has found two possible locations for the restaurant; one closer to the central business district (cbd) and one in the suburbs. geoff is concerned that if he chooses the cbd location, he will have to charge higher prices for his food to cover the higher rent. geoff is uncertain of the affect that this will have on his annual revenue. to help with his decision, geoff will carry out a multiple regression analysis to predict the annual revenue earned by restaurants based on their distance from the cbd in miles and the average price in dollars charged for a dish. geoff has collected a sample of 50 restaurants that are randomly spread around the city. the proximity to the cbd (x1i), average price of a dish (x2i) and annual revenues (yi) were recorded for each of these restaurants (i = 1, 2, ..., 50). Geoff believes that a multiple linear regression is appropriate for this data. After carrying out some analysis, geoff has noticed that moving one mile away from the CBD (assuming that the average price of a dish is held constant) will result in a decrease of $60,000 in annual revenues. Geoff has also noticed that increasing the average price of a dish by $1 (assuming that the distance from the CBD is held constant) will result in an increase of $40,000 in annual revenues. The data shows that a restaurant at the center of the CBD that gave away its food for free would have an annual loss of $20,000. Select the multiple linear regression equation that corresponds to Geoff's analysis: o ĝi = -20,000 - 60,000x11 + 40,000x2i o ĝi = 20,000 + 60,000x11 - 40,000x2i O Vi = -20,000 + 40,000x11 - 60,000x2i © y = 20,000 - 40,000x13 + 60,000x2i
The multiple regression linear regression equation is:
i = -20000 + -60000*x1i + 40000*x2i
The multiple regression equation here will be of the form
i = a*x1i + b*x2i + c
Where i is the annual revenue
a is the coefficient of x1i which is distance from CBD
where b is the coefficient of x2i average price of a dish
C is the constant term.
Given that moving one mile away from the CBD x1i , the annual revenues will i will decrease by $60000. So, the coefficient of x1i, a is -60000
Given that increasing the average price of dish x2i by $1 , the annula revenue will i will increase by $40000. So the coefficient of x2i, b is 40000
The data shows that the restaurant at the center of the CBD which means, x1i = 0 and giving away its food for free which means x2i = 0 is resulting in a loss of $20000. so the value of the constant term is c=20000.
so the multiple regression linear regression equation is:
i = -20000 + -60000*x1i + 40000*x2i
hence option A is correct
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What is 6 13/15 rounded to the nearest whole number?
Answer:
The answer is 7
Step-by-step explanation:
Unit 5 relationships with triangle homework3
3456
Step-by-step explanation:
2x2=4 3456 67867789990
what fraction is exactly between 4/7 and 3/5
Answer:41/60
Step-by-step explanation:
3/5 and 4/7 can also be expressed as 21/30 and 20/30 respectively.
(7 and 5 have a common multiple of 30) if you multiply both of these by 2/2 (aka 1) then you get 42/60 and 40/60 respectively.
In between these 2 fractions is 41/60.
Ten individuals have participated in a diet modification program to stimulate weight loss. Their weight bothbefore and after participation in the program is shown below:Before195,213,247,201,187,210,215,246,294,310
After187,195,221,190,175,197,199,221,278,285
Is there evidence to support the claim that this particular diet-modification program is effective in producingmean weight reduction? Computep-value and state your conclusion usingα= 0.05.
(a)p-value<0.0005; rejectH0(b)p-value<0.0005; do not rejectH0(c)0.25< p-value<0.40; rejectH0(d)0.25< p-value<0.40; do not rejectH0(e)None of the preceding
The evidence is not sufficient to support the claim since the p-value is 0.1833 higher than 0.05, so e) none of the preceding.
How to find p-value?α = significance level = 0.05
n = sample size
df = degree of freedom = n - 1 = 10 - 1 = 9
Before we find the p-value, we use t test formula. But, before that we calculate mean and standard deviation for two population with excel.
In excel we get,
[tex]\bar x_1[/tex] = 231.8
[tex]\bar x_2[/tex] = 214.8
[tex]\sigma_1[/tex] = 41.95
[tex]\sigma_2[/tex] = 37.90
Next, we can calculate t test. So,
t = [tex]\frac{\bar x_1 -\bar x_2}{\sqrt{\frac{\sigma^2_1+\sigma^2_2}{n}}}[/tex]
= [tex]\frac{231.8-214.8}{\sqrt{\frac{41.95^2+37.9^2}{10}}}[/tex]
= [tex]\frac{17}{\sqrt\frac{3,196.2125}{10}}[/tex]
= 0.9509
Using t score to p-value calculator for 0.9509, we get p-value = 0.1833.
Thus, the p-value is 0.1833 is higher than significance level 0.05 so there is no sufficient evidence to support the claim.
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Robert swims a lap in the pool. His coach graphs his distance from the starting block.
A. Determine whether each graph is a function. Justify your answer.
B. Construct Arguments - Which graph must be incorrect. Explain
Answer:
Huh???
Step-by-step explanation:
THERE ARE NO GRAPHS!!!
a study of whether or not customers respond to odors took place in a small pizza restaurant in france on two saturday evenings in may. on one of these evenings, a relaxing lavender odor was spread through the restaurant. on the other evening, no scent was used. the restaurant owners computed the mean amount spent on each night and computed a 95% confidence interval for the difference of means (lavender minus no odor) in euros to be (2.40, 4.82). can the researchers conclude there is a difference between the two means
The limits of the confidence interval are positive and don't include 0.
What is the confidence interval?
A confidence interval is a range of estimates for an unknown parameter in frequentist statistics. A confidence interval is calculated at a specified confidence level; the 95% confidence level is most commonly used, but other levels, such as 90% or 99%, are occasionally used.
Yes, there is a significant difference between the 2 means.
Since both the limits of the confidence interval are positive and
doesn't include 0.
Hence, the limits of the confidence interval are positive and don't include 0.
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Please help need this done asap
geometry classifying triangles
The classification of the following triangles are below:
Diagram 1: Scalene triangle. option BDiagram 2: Equilateral triangle. option ADiagram 3: Isosceles triangle. option BDiagram 4: Acute triangle. option ADiagram 5: The value of a in the convex polygon is 40°Diagram 6: The value of s from the measure is 27Diagram 7: The value of m < 1 is 56°Diagram 8: The value of m < 1 is 120°The types of triangleThe types of triangle includes:
Scalene: A triangle having each of its three sides of different lengths.Equilateral triangle: A triangle having all three sides equal.Isosceles triangle: A triangle having two sides equal.Obtuse triangle: A triangle in which one of whose angles is obtuse, that is, an angle greater than 90° but less than 180°Acute triangle: A triangle which all of the angles are acute, that is, all interior angles are less than 90°Right angle triangle: A triangle all of the angles of which are acute.5. a = 180° - (56° + 84°)
= 180° - 140°
= 40°
6.
5s + (3s - 9) + 45 = 180
5s + 3s - 9 + 45 = 180
8s - 36 = 180
8s = 180 + 36
8s = 216
s = 216/8
s = 27
7. 180° - 139° = 41°
m < 1 = 180° - (41° + 83°)
= 180 - 124
m < 1 = 56°
180° - (68° + 52°)
= 180 - 120
= 60°
m < 1 = 180° - 60°
= 120°
Therefore, a triangle is a three sides polygon which also have three angles.
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1.2x + 4.4 - 0.8x - 2.2
Simplify would be 0.4x + 2.2
a 100 ml beaker holds 170 gg of liquid. part a what is the liquid's density in si units? express your answer with the appropriate units.
The SI unit for density is kilogram per cubic meter (kg/m³)/
The density of liquid is 0.17 × 10⁸.
Kilogram Per Cubic Meter:
The SI unit for density is the kilogram per cubic meter (kg/m3). For many situations, however, this as an inconvenient unit, and we often use grams per cubic centimeter (g/cm3) for the densities of solids and liquids, and grams per liter (g/L) for gases.
According to the question:
Firstly, have to change your units to kilograms and cubic meters. Since there are a thousand grams in a kilogram,
170g = 1.70 x 10⁻¹ kg.
Since there are a thousand milliliters in a liter and a thousand liters in a cubic meter
100ml = 1.00 x 10⁸ cubic meters
Therefore, Density= mass/volume
Density = 1.7 x 10⁻¹/ 1.00 x 10⁸ kg/m³
= 0.17 x 10⁸ kg/m³.
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A field measures 40 by 80 yards. Larysa makes a scale drawing with a scale of 1 in. to 5 yd., and Prakash makes his own scale drawing with a scale of 1 in. to 8 yd. Whose drawing has a larger area? Explain your reasoning.
Answer:
larysa got a larger drawing because 1 in 5 is bigger then 1 in 8 yards so that makes her area way larger
PLEASE HELP, WILL GIVE BRAINLIEST! THANK YOU!
Assume the variable s has been assigned a value, and the variable the_set refers to a set. Write an expression that whose value is True if the value that is referenced by s is in the_set.
s in the_set
s in the_set is the expression that whose value is true if the value that is referenced by s in the_set.
The right response to the question is assignment operator (=). Explanation: The = operator is used to assign a value to a variable, or we may say to hold the value of a variable. An assignment operator is referred to as the = operator.
A variable's name and storage space are assigned when a value is to be stored there. We saw that we could provide a variable both a string (text) and a numeric value. We also saw that we could give a variable a new value, replacing any previous ones, by reassigning it.
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There are 60 students in Kinsley's grade. 3 of the students are enrolled in health. What
percentage of the students are enrolled in health
HELp plssssss
Travis used the linear model y = 0.3x + 2000 to predict her total salary from achieving total sales of x.
What is her base salary?
What percent commission does she earn?
Answer:
i think it's 6,000
Step-by-step explanation:
just multiple 3.0 x 2,000 and you will get 6,000
a right triangle has a hypotenuse of length 3 units and one side of length 2 units. what is the area of the triangle?
The area of the triangle is 3 units² which has a hypotenuse of 3 units and a side of 2 units.
What is a triangle?A triangle is a 3-sided polygon that is occasionally (though not frequently) referred to as the trigon.
There are three sides and three angles in every triangle, some of which may be the same.
In the case of a right triangle, the three sides are given unique names: the hypotenuse, which is the side that faces the right angle, and the legs, which are the other two sides.
Every triangle is bicentric and convex.
The triangle's interior is the area of the plane it encloses; the outside is the rest of the plane.
So, the area of the triangle will be:
We know that the hypotenuse is 3 units.
The length of the other side is 2 units.
Area of triangle formula: 1/2 * base * height
Now, insert values in the formula and calculate:
1/2 * base * height
1/2 * 2 * 3
3 units²
Therefore, the area of the triangle is 3units² which has a hypotenuse of 3 units and a side of 2 units.
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Brian slept for eight hours on Monday night. How many minutes did he sleep?
Answer:
480
Step-by-step explanation:
8 * 60 = 480
The wholesale price of a TV is $650. The store markup is 15%. What is the retail price of the TV?
Answer:
$747.50
Step-by-step explanation:
Natalie needs to compare the number of employees by job title for the last five years. Which of the following charts should Natalie use?
Answers: A. Pie chart
B.Clustered column chart
C.Histogram
D.Scatter chart
Natalie should use Clustered Column Chart.
What is a Clustered Column Chart?
A clustered column chart is a vertical representation that shows data in groups (columns) that are connected to one another. Each column's data is separated into categories according to an attribute like year, age, sex, or race.For the purpose of comparing various variables, many bars are clustered in the same class in a clustered-column (bar) chart which is a specific kind of column (bar) chart. Hence, (B.) Clustered Column Chart is the correct option.
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On a coordinate plane, a dashed straight line with positive slope goes through (0, 0.75) and (2, 4.75). Everything to the left of the line is shaded.
Which inequality is represented by the graph?
A. y > 2x + (3/4)
B. y < 2x + (3/4)
C. y > (1/2)x + (3/4)
D. y < (1/2)x + (3/4)
Which point is a solution to the inequality?
A. (-2, -4)
B. (-1, -2)
C. (1, 2)
D. (2, 5)
The inequality is represented by the equation
A. y > 2x + (3/4)D. (2, 5) is the solution of the inequality
How t find the inequality representedThe given points are (0, 0.75) and (2, 4.75) these is used to calculated the slope
m = (y - y') / (x - x')
m = (4.75 - 0.75) / (2 - 0)
m = 4 / 2 = 2
using the point slope formula which is
(y - 4.75) = 2 (x - 2)
y - 4.75= 2x - 4
y = 2x + 0.75
y = 2x + 3/4
dashed straight line with positive slope goes and Everything to the left of the line is shaded means greater than >
y < 2x + (3/4)
Watching the graph the solution is D(2, 5) this point is in the shaded area
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Explain in detail with at least two sentences how to graph the complex number z = 3-5i in the complex
plane
A complex number is represented on a complex plane. The number [tex]z = 3-5i[/tex] is represented in a smilar manner as real numbers but y axis cosidered a imaginary axis.
What is a complex plane?
A complex plane is formed by complex numbers in a similar manner as the Cartesian coordinate system. But the x axis is made up of real numbers and y axis is made up of imaginary numbers.
A complex number is plotted on a complex plane. In the complex plane the x axis is known as the real axis and the y axis is known as the imaginary axis.
Consider the given complex number.
[tex]z = 3-5i[/tex]
Here, 3 is real number and -5 is imaginary number.
Since 3 is real number hence, move 3 steps in the right direction on x axis. Now, -5 is the imaginary number hence, move 5 steps in the downward direction parallel to the y axis.
The final position is [tex]z = 3-5i[/tex].
Hence, a complex number is represented on a complex plane.
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Hilary paints a wall in her bedroom that has two windows, as shown. What percent of the wall does she paint? Round your answer to the nearest whole percent, it necessary.
The percent of the wall does she paint will be;
⇒ 79%
What is mean by Percentage?
A number or ratio that can be expressed as a fraction of 100 or a relative value indicating hundredth part of any quantity is called percentage.
Given that;
The length of room wall = 8 feet
The width of room wall = 12 feet
The length of windows = 5 feet
The width of windows = 2 feet
Now,
The area of wall = 12 x 8 feet²
= 96 feet²
And, The area of windows = 5 x 2 feet²
= 10 feet²
Hence, The area of paints a wall in her bedroom = 96 - 2 (10)
= 96 - 20
= 76 feet²
So, She paint the wall of area 76 feet².
Since, The area of whole wall = 96 feet²
But, There are two window.
So, The percent of only wall paint of are 76 feet² = 100 x 76 / 96
= 79.16%
Thus, The percent of the wall does she paint to the nearest whole percent will be;
⇒ 79%
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Simplify the expression to a polynomial in standard form: (-2x-1)(-3x^2+6x+8)
The simplified form of the given expression is 6x³-9x²-22x-8
What is simplification?To simplify a mathematical expression is to represent it in the least complicated form possible.
Given an expression, (-2x-1)(-3x²+6x+8)
(-2x-1)(-3x²+6x+8) = 6x³-12x²-16x+3x²-6x-8
= 6x³-9x²-22x-8
Hence, The simplified form of the given expression is 6x³-9x²-22x-8
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The length of a rectangular pool is seven less than twice its width. If the
perimeter of the pool is 106 feet, find its dimensions.
Answer:
width = 20 ft; length = 33 ft
Step-by-step explanation:
The formula for perimeter of a rectangle is P = 2l + 2w
Given that the length is seven less than twice its width, we have
[tex]l=2w-7[/tex]
We need to have only one variable or we can't solve.
Thus, we have:
[tex]106=2(2w-7)+2w\\106=4w-14+2w\\106=-14+6w\\120=6w\\20=w\\\\l=2w-7\\l=2(20)-7\\l=40-7\\\\l=33[/tex]