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Vinvika [58]
3 years ago
7

PLEASE HELP "Given a sample mean of 3.56 and a standard deviation of 0.98, which value falls within the 90% confidence interval

for a sample size of 45?"
A.
3.21
B.
3.28
C.
3.83
D.
3.57
Mathematics
1 answer:
trasher [3.6K]3 years ago
7 0

Answer:

D. 3.57

Step-by-step explanation: Edmentum

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What is the volume of a rectangular prism with length 7 in., height 3 in., and width 8 in.?
beks73 [17]

Answer:168

Step-by-step explanation: v=lwh

V=7x8x3

= 168

3 0
4 years ago
The surface area of a triangular pyramid is 375.2 m2. What would change if the surface area were measured in square centimeters?
Tamiku [17]
I believe that D. The surface area of the pyramid would stay the same, but the number representing the surface area would increase is correct because when you just move it to another units, it still the same but you'll need to move the decimal two places to the left and the number 37520 cm² is greater than the number of 375.2 m²
8 0
3 years ago
Two angles are complementary. One angle is ten less than four times the other angle. Find the measure of the larger angle
Nimfa-mama [501]

Answer:

B.70

Step-by-step explanation:

For one or two angles are complementary angle(s), they have to equal 90°.

So, we need to find the larger angle, but what about the other?

Let x be the other angle and y be the angle we are looking for

x + y = 90

Lets look for x first, since one angle is ten less than four times the angle we are looking for or visa versa, we must:

y = 4x - 10

For an exchange, lets take out the y variable for another x variable:

So now we should have x + 4x - 10 = 90

Combine like terms and do cross equation :

x + 4x -10 = 90

5x - 10 = 90

Add 10 to both sides:

5x = 100

100/5 = 20

So <u><em>x=20</em></u>

<u><em></em></u>

Now for y which is what we are looking for,

y = 4x - 10

Since x is 20, plug it in

y = 80 - 10

y=70 is our larger angle

5 0
3 years ago
The length and width of a rectangle are in a 3:5 ratio. The perimeter of the rectangle is 64. What are the length and width of t
Levart [38]

Hey there! I'm happy to help!

We know that the perimeter is 2L+2W. Le'ts plug in the values 3 and 5 from our ratio and see what our perimeter would be with that.

2(3)+2(5)

6+10

16

How can we get this 16 to 64?

64/16=4

So, we need to multiply this length and width by four to get 64 as our perimeter!

3*4=12

5*4=20

We can plug this into our perimeter equation

2(12)+2(20)

24+40

64

Therefore, our length is 12 and our width is 20.

Have a wonderful day! :D

5 0
3 years ago
What happens to the value of f(x) = log4^x as X approaches zero from the right
VARVARA [1.3K]

Answer: F(x) approaches - infinity

Step-by-step explanation:

6 0
3 years ago
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