Answer:
(5.097, 7.404)
Step-by-step explanation:
We have the standard deviation for the sample, which means that the t-distribution is used to solve this question.
The first step to solve this problem is finding how many degrees of freedom, we have. This is the sample size subtracted by 1. So
df = 40 - 1 = 39
90% confidence interval
Now, we have to find a value of T, which is found looking at the t table, with 39 degrees of freedom(y-axis) and a confidence level of [tex]1 - \frac{1 - 0.9}{2} = 0.95[/tex]. So we have T = 1.6849
The margin of error is:
[tex]M = T\frac{s}{\sqrt{n}} = 1.6849\frac{4.33}{\sqrt{40}} = 1.154[/tex]
In which s is the standard deviation of the sample and n is the size of the sample.
The lower end of the interval is the sample mean subtracted by M. So it is 6.25 - 1.154 = 5.096 hours
The upper end of the interval is the sample mean added to M. So it is 6.25 + 1.154 = 7.404 hours.
The answer is (5.097, 7.404)
PLEASE PLEASE HELP ME THIS IS DUE VERY SOON I NEED YOUR HELP!
Answer:
1. (3,-2)
2. (-1, -3)
3. (-4, 5)
4. (2, 5)
Step-by-step explanation:
find the side lengths ! help pls
(a) the given triangle is a isosceles triangle, therefore the two leg sides will be congruent, as well as the two base angles. It is given that one of the base angles ∠XYW is 70°, therefore, due to the law of a isosceles triangle, the measurement of ∠XWY is also 70°. Remember, a triangle's interior angles add up to 180°, so:
180 - (70 + 70) = 180 - 140 = 40
40° is your answer.
m∠X = 40°
(b) All sides are congruent, making it a equilateral triangle. If it is a equilateral triangle, then all the angles also have the same measurement. The total of the interior angle's measurement is 180°. Divide by the amount of angles, 3:
180/3 = 60
60° is your answer.
m∠V = 60°
~
What is the height of a triangular base of a paperweight with a volume of 96 cubic inches, length is 8 in and with is 6 inches?
Answer:
4 inches
Step-by-step explanation:
Triangular prism formulas
Volume = 0.5 * b * h * length, where b is the length of the base of the triangle, h is the height of the triangle and length is prism length. area = length * (a + b + c) + (2 * base_area) , where a, b, c are sides of the triangle and base_area is the triangular base area.
How to find the height of a triangle - formulas
area = b * l / 2, where b is a base, l - length.
so l = 2 * area / b/w-width.
Solve
1/2 x 6 x 8 x ? = 96
2 x 96 = 192
192/8 = 24
24/6 = 4
length = 4 inches
213=22: Z=14 Select True or False for each equation as is state
O True
O False
5x=25
Find the exact value of x
Answer:
5
Step-by-step explanation:
the average of 6 members to 2 8 9 x 7 and 12 is 7 find the value of x
Answer:
x=(-45)
Step-by-step explanation:
2+8+9+x+7+12=7
38+x=7
x=(-45)
38+(-45)=7
If Jacob's salary of $2,100 per month is increased by 5%, what is her new monthly salary?
Answer:
2,205
Step-by-step explanation:
Which points on this vertical number line best represent the locations of 2.5 and
A: G and J
B: G and K
C: H and I
D: H and J
Does the mapping diagram represent a function? Why or why not?
Answer:
If I was you I can go
for A because the function name is one to many
ZABD and ZDBC are supplementary angles.
What is the measure of x?
X = [?]
D
126%
AK
> C
B
Angles are not drawn to scale.
Enter
Answer:
x=154°
Step-by-step explanation:
x+126=180 supplementary
x=180-126=54
When two parallel lines are cut by a transversal, the corresponding angles are
Question 20 options:
A)
not congruent.
B)
congruent.
C)
complementary.
D)
supplementary.
Answer
B Congruent
Step-by-step explanation:
Corresponding angles are congruent when the lines are parallel
Answer:
B) Congruent
Step-by-step explanation:
Corresponding angles are always equal to each other.
Find the distance on maple street, in miles, from M to P
Answer:
8
Step-by-step explanation:
Use the right triangle altitude theorem. The three triangles are right triangles and are similar.
MP/FP = FP/EP
MP/12 = 12/(EM + MP)
MP/12 = 12/(10 + MP)
MP(10 + MP) = 144
MP^2 + 10MP - 144 = 0
(MP + 18)(MP - 8) = 0
MP = -18 or MP = 8
Since a side length cannot be negative, the answer is MP = 8
Answer: 8
three of the exterior angles of an n sided polygon are 50° each, two of its exterior angles are 127°and 135° and the remaining interior angles are 173°each. find the value of n
Answer:
i think there is something wrong with this problem
Step-by-step explanation:
maximum sum of all exterior angles is 360°
3(50°) = 150
150° + 127° + 135° = 412°
Find the area of the regular polygon
Answer:
!
Step-by-step explanation:
here it is!!!!!!!!!!!!!!!
Determine whether
25m/
5
is equivalent to each of the following expressions.
Equivalent
Not equivalent
25m-1
252m-1
52m-1
Answer:
(a) and (b) are not equivalent
(c) is equivalent
Step-by-step explanation:
Given
[tex]\frac{25^m}{5}[/tex]
See attachment for complete question
Required
Determine an equivalent or nonequivalent expression
[tex](a)\ 25^{m-1[/tex]
We have:
[tex]25^{m-1[/tex]
Apply law of indices
[tex]25^{m-1} = \frac{25^m}{25}[/tex]
This is not equivalent to [tex]\frac{25^m}{5}[/tex]
[tex](b)\ 25^{2m - 1}[/tex]
We have:
[tex]25^{2m - 1}[/tex]
Apply law of indices
[tex]25^{2m - 1} = \frac{25^{2m}}{25}[/tex]
This is not equivalent to [tex]\frac{25^m}{5}[/tex]
[tex](c)\ 5^{2m-1}[/tex]
We have:
[tex]5^{2m-1}[/tex]
Apply law of indices
[tex]5^{2m-1} = \frac{5^{2m}}{5^1}[/tex]
[tex]5^{2m-1} = \frac{5^{2m}}{5}[/tex]
Evaluate the numerator
[tex]5^{2m-1} = \frac{25m}{5}[/tex]
This is an equivalent expression
Find the area of the region. Interior of r = 7 + 5 sin (below the polar axis)
What is another way to describe the following expression?
5−(x+y)3
Answer:
How can I help you?
5−(x+y)35-(x+y)3
Simplify
Simplify the expression.
−3x−3y+5-3x-3y+5
Answer:
the difference of 5 and the cube of the sum of x and y
5 t-shirt cost R120.how much will 9t-shirt cost
Answer:
5 t-shirt = 120
1 t-shirt = 120/5= 24
9 t-shirts = 24*9= 216
rs 216
Find a formula for a geometric sequence that begins with 11, -33, 99
Answer:
17
Step-by-step explanation:
plz help will give crown
Answer:
C
Step-by-step explanation:
Can I have crown
Find the zeros of the polynomial m2 - 11m + 18.
Answer:
Step-by-step explanation:
The zeroes are the values of such that
m² - 11m + 18 = 0
Quadratic formula:
m = [11 ± √(11² - 4∘1∘18)]/[2∘1]
= [11 ± √49]/2
= [11 ± 7]/2
= 9, 2
18 is 32% of what number w
Answer:
56.25
Step-by-step explanation:
100% of 56.25 is 56.25, therefore 32% of 52.25 equals 18
Joey is buying a new flat screen TV for $359.99. Sales tax in Jeoy's state is 8.25%. Calculate the amount of sales tax that Jeoy will pay for the purchase
Answer: 389.69
Step-by-step explanation:
Answer: $29.70
Step-by-step explanation:
total x tax rate= 359.99 x 8.25 = 2969.92
divide by 100% = $29.70
sales tax total: $29.70
Which of the following statements about rotations are true? Select all that apply.
a. The shape of the figure does not change.
b. The position of the figure does not change.
c. The size of the figure does not change.
d. The orientation of the figure does not change.
e. The coordinates of the figure do not change.
Answer:
hmmm I guess it has to be e. if I 'm wrong
A quantity with an initial value of 140 decays continuously at a rate of 4% per decade. What is the value of the quantity after 98 years, to the nearest hundredth?
(pls answer)
9514 1404 393
Answer:
93.84
Step-by-step explanation:
The exponential function will be of the form ...
q = a×b^t
where 'a' is the initial quantity and b is the growth factor per time period t.
If we use decades as the time period, then the growth factor is 1 more than the growth rate of -4%. For the initial value 140, the function is ...
q = 140×(1 -4%)^t
q = 140×0.96^t
98 years is 9.8 decades, so the quantity q remaining will be ...
q = 140×0.96^9.8 ≈ 93.84
The quantity remaining will be 93.84 after 98 years.
Answer:
94.6
Step-by-step explanation:
Find the volume of the composite figure.
I need the answer for both of them I’ll give your Brainly help
Answer:
11. a)50 12. a)40
Step-by-step explanation:
sum of all three angles of trinagle=180
so
111.
80+50+x=180
130+x=180
x=180-130
x=50
12.
60+90+x=180
150+x=180
x=190-150
x=40
Answer:
A and C
Step-by-step explanation:
GIVING BRAINLIEST TO FIRST COMPLETE ANSWER
View the work below from a student last year. What was their mistake? Be detailed in their response.
-3(x + 4) = 2x - 5
-3x + 4 = 2x - 5
4 = 5x - 5
9 = 5x
1.8 = x
Answer:
x = -1.4
Step-by-step explanation:
-3(x + 4) = 2x - 5
-3x + (-3*4) = 2x - 5
The mistake was in the above equation where -3 should be multiplied with 4.
-3x -12 = 2x -5
5 -12 = 2x+3x
-7 = 5x
x = -7/5 = - 1.4
Give the ordered pair of the 3rd Critical point.
Y = 4cos10(x - 12°) +16
13. Find the measure of angle ABC. B 8x 6x 6x A С
Angle A = 54 degree
Angle B = 72 degree
Angle C = 54 degree
ExplainIt is a triangle, so the total of angle is 180 degree
Find X
8x + 6x + 6x = 180
20x = 180
x = 180/20
x = 9°
Value of x is 9°
Substitute a score of x for every angle =
Angle A
= 6x
= 6(9)
= 54°
Angle B
= 8x
= 8(9)
= 72°
Angle C
= 6x
= 6(9)
= 54°
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