I need help with my work ASAP
Answer:
Step-by-step explanation:
The area for the sector of a circle is
[tex]A_s=\frac{theta}{360}*\pi r^2[/tex] where theta is the measure of the central angle. We have some given values to fill in:
Area is 64π and the central angle is 90°, so all we have left to find is the radius. Filling into the equation:
[tex]64\pi =\frac{90}{360}*\pi r^2[/tex]
Let's get that solved for r-squared first:
[tex]\frac{360(64\pi )}{90\pi } =r^2[/tex]
Doing all the math on that gives us:
[tex]256=r^2[/tex]
Take the square root of both sides and get that r = ±16. BUT we know that lengths cannot be negative, so we disregard the -16 and say that the radius is 16 inches.
i need help now please
Answer:
16
Step-by-step explanation:
There are 2 girls for every 3 boys in Mrs. Sanchez' class. If there are 12 boys in the class, how many girls are there?
8 girls are there in Mrs. Sanchez' class.
What is unitary method?The unitary method is a technique for solving a problem by first finding the value of a single unit, and then finding the necessary value by multiplying the single unit value.
Based on the given conditions, formulate
2 girls ⇒ 3 boys
X girls ⇒ 12 boys
3X = 12 × 2
⇒ 3X = 24
⇒ X = [tex]\frac{24}{3}[/tex]
⇒ X = 8
Hence, 8 girls are there in Mrs. Sanchez' class.
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A scientist is interested in whether there is a linear relationship between the amount of mercury in a lake and the surface area of the lake. The scientist collected data on 22 lakes of a similar type selected at random and used the data to test the claim that there is a linear relationship. The following hypotheses were used to test the claim.
H0:β=0
Ha:β≠0
The test yielded a t-value of 2.086 with a corresponding p-value of 0.05. Which of the following is the correct interpretation of the p-value?
a. If there is a linear relationship between the amount of mercury in a lake and the surface area of the lake, the probability of observing a test statistic as extreme as 2.086 or more extreme is 0.05
b. If there is a linear relationship between the amount of mercury in a lake and the surface area of the lake, the probability of observing a test statistic of 2.086 is 0.05.
c. If there is not a linear relationship between the amount of mercury in a lake and the surface area of the lake, the probability of observing a test statistic of 2.086 or greater is 0.05.
d. If there is not a linear relationship between the amount of mercury in a lake and the surface area of the lake, the probability of observing a test statistic of 2.086 is 0.05.
e. If there is not a linear relationship between the amount of mercury in a lake and the surface area of the lake, the probability of observing a test statistic as extreme as 2.086 or more extreme is 0.05.
Answer:
b. If there is a linear relationship between the amount of mercury in a lake and the surface area of the lake, the probability of observing a test statistic of 2.086 is 0.05.
( the null is rejected and alternate is accepted)
Step-by-step explanation:
Here the critical value is t≥ t∝/2(n-2) = ± 2.086
The significance level is ∝= 0.05 and the p- value is also 0.05
Which indicates that there is no correlation between the dependent and the independent variable.
If the p - value is less than 0.05 the null hypothesis is rejected.
There is a 5% chance that the hypothesis is true.
So the null hypothesis should be rejected.
Given these options
a) if------as 2.086 or more extreme is 0.05
2.086 or 0.05 is the same in this case one cannot be more extreme.
c) of 2.086 or greater is 0.05.
b). If there is a linear relationship ------.
This is the alternate hypothesis.
0.05 is not greater than 2.086 in the given question
d) If there is not a linear relationship between the amount of mercury in-----.
This is the claim which is formulated as null hypothesis.
e) if---- 2.086 or more extreme is 0.05.
0.05 is the same as 2.086
At p- value 0.05 we reject the null hypothesis and accept the alternate hypothesis
What is the slant height x of this square pyramid?
Kim kept track of how much cereal she ate for two months and found that she ate 256 ounces of cereal in that time.
How many pounds is that? (16 ounces = 1 pound)
A. 16 pounds
B. 8 pounds
C. 4,096 pounds
D. 32 pounds
Answer:
a 16 pounds
Step-by-step explanation:
256/16=16pounds
A pair of pants normally cost $47.75 and is on sale of 35% off what is the selling price
Answer:
$31.04
Step-by-step explanation:
Pleasee i need helppp Pleasse anyone
Answer:
B is not correct. rational numbers can be negative
I need help! Can you help me pls?
Answer:
The first one
Step-by-step explanation: the ABC triangle has a 25-degree angle and a 90-degree angle as you can see by the marks. The first triangle has a 25-degree angle and a 90-degree angle as you can see by the marks. The second one does have a 90-degree angle but it's a different shape and has no 25-degree angle. The third one has both angles 25 and 90 but if you look close it's a different shape. The last one does not have a 90-degree angle but it does have a 25-degree angle and it's a different shape.
So it would be the first option.
Ryan surveyed parents. He found 3 out of every 5 parents vote. 450 parents eligible. How many parents will vote in the election?
I need help...WILL GIVE BRAINLIEST!!!!!!
Answer:
Step-by-step explanation:
1. 30 degrees (vertical angles)
2. 60 degrees (complementary angles)
3. 150 degrees (supplementary angles and vertical angles)
4. 90 degrees (complementary angles)
Answer:
Step-by-step explanation:
Sally spins a spinner twice with 8 equal sections
numbered 1 through 8 Find P(sum is even ∩ sum < 9)
A gelato shop tries to give consistent scoop sizes, but some flavors of gelato are denser than others. Here's the
historical data for the mass per scoop of two flavors:
Flavor
Shape
Mean (g)
Standard deviation (g)
Hazelnut
Normal
83
9.3
Dulce de leche
Normal
67.5
7.8
Suppose they weigh a sample of 20 randomly selected scoops of hazelnut gelato and 15 scoops of dulce de
leche gelato. They will then look at the difference in their sample means (Tu – īp).
What do we know about the shape of the sampling distribution of CH
TD, and why?
Answer:
It's exactly normal, because both populations are normally distributed.
Step-by-step explanation:
Khan Academy
Find an equation of the line that satisfies the given conditions. Through (1, 2) parallel to the line y = 7x − 7
A bag contains:
.
5 red marbles
6 blue marbles
3 green marbles
4 black marbles
2 yellow marbles
.
.
A marble will be drawn from the bag and replaced 100 times. What is a reasonable prediction
for the number of times a green or black marble will be drawn?
F. 14
G. 65
H. 7
J. 35
Answer:
i would say the answer is J. 35
Step-by-step explanation:
sowwy if i am wrong but if not can have brainliest
QUICK WHATS THE ANSWER
Answer:
132
Step-by-step explanation:
4 times 11 times 3 and that should be your answer
The dot plots show the numbers of adult books purchased by customers at two different bookstores on one day
Which statement is supported by the dot plots?
Pls explain!!!
Answer:
H mean of data for store 1 is greater than mean for store 2
Step-by-step explanation:
mode for store 1 = 3
mode for store 2 = 2
range for store 1 = 6
range for store 2 = 6
mean for store 1 = 3.3125
mean for store 2 = 2.588
median for store 1 = 3
median for store 2 = 2
Can someone help me with this.
Expand (x²-3y)⁵ s using the binomial theorem and simplify the result.
Answer:
answer is in the picture
The probability distribution for a
random variable x is given in the table.
-5
-3
-2
0
2
3
Probability
.17
.13
.33
.16
.11
.10
Find the probability that -2
3. Julio deposited $3,000 in a savings
account that pays 2.5% interest
compounded annually. What is the total
value of the account after 4 years?
A $3,311.44
C $3,117.18
B $3,300.00
D $3.075.00
I
Please help I am failing math
Answer:
x = 50°Step-by-step explanation:
According to Angle sum property of triangle,
x + 45° + 85° = 180°
=> x = 180 - 85 - 45
=> x = 180 - 130
=> x = 50
Hence,
The missing angle x is 50° (Ans)
Answer:
45+85+x=180(sum of angle of triangle)
or, 130+x=180
or, x=180-130
x=50
Step-by-step explanation:
here, the sum of angle of triangle is 180
For each part below, use the figure to fill in the blank.
Answer:
a) m<F = 70
b) AB = 6
Step-by-step explanation:
a)
Since this is an isoceles triangle, the base angles are equal so:
2x + 40 = 180
2x = 140
x = 70
b)
Since all of the angles are equal, this is an equilateral triangle. This also makes all of the sides equal and the same.
Please help whit ratio
Answer: 12 tigers
Step-by-step explanation:
Since the ratio of lions to tigers is 1:3, meaning that for every one lions there three tigers and there's 4 lions and for every one lion there 3 tigers so we need to mulitpy 4 by 3
4×3=12 meaning there 12 tigets in the zoo.
Answer:
There are 12 tigers!
Explanation:
Let the tigers be X.
The ratio is 1:3, so it means that 1:3 = 4:X
1 x X = 3 x 4
X = 12
So, there are 12 tigers.
Have a good day!
Can someone help me please?
Answer:
5 1/6
Step-by-step explanation:
NEED HELP ASAP Which side lengths form a right triangle?
Answer:
the answers is B, 3,4,5
Step-by-step explanation:
Allie is 26 years old. This is half of her
brother Alex's age, plus 5 years.
How old is Alex?
Answer:
18
Step-by-step explanation:
Find the value of x in the triangle shown below 9 3
Answer:
x = 9.4868
Step-by-step explanation:
For this problem we can use the Pythagorean Theorem
Pythagorean theorem = [tex]a^2+b^2=c^2[/tex]
IN THIS CASE C = X
A and B are the side and base lengths of a right triangle.
C is the Hypotenuse side.
[tex]9^2+3^2=c^2[/tex]
Solve...
81 + 9 = [tex]c^2[/tex]
90 =[tex]c^2[/tex]
[tex]\sqrt{90}[/tex] = c
c = 9.4868
giving out brainliest answer !!!! help me out asap please !!!!
9514 1404 393
Answer:
(a) 63.4 degrees
Step-by-step explanation:
Any of the trig relations can be used. Since the picture cuts off the value of the hypotenuse, we choose to use the adjacent and opposite sides.
Tan = Opposite/Adjacent
tan(L) = 6/3 = 2
L = arctan(2)
∠L ≈ 63.4°
__
Your calculator can do this, too. Be sure the mode is set to "degrees."
ANSWER THIS PLEASE ILL GOVE YOU BRAINLIEST PLEASE SHOW ME HOW TO DO IT:(
What is the slope of the line y= 1/2x + 3/4?
Answer:
1/2
Step-by-step explanation:
Answer:
The slope is 1/2 because there is a variable beside
Step-by-step explanation: