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Morgarella [4.7K]
3 years ago
7

So confused on 30 and 31 and need to get them done!

Mathematics
2 answers:
nexus9112 [7]3 years ago
7 0
The formula for the circumference of a circle is

C=πd         where d=diameter
lets plug in what we know
C=48π

Since they wanted it expressed in terms of pi, this is where you stop so the answer would be 48π

Answer=48π

31. 
For this one they want you to solve for the surface area. I cant really show this as they want you to draw a picture but i will try and explain it as best i can.

So imagine the prism show was like a cardboard box, and you broke it down so that all of the sides lay flat so it looks like the picture below. Now they want you to find the area of all of those squares. so you should in the end have to of those squares be 5*7=35in² as the area, two be 7*9=63in² as the area and the last two as 5*9=45in² as the area. Good luck!

stira [4]3 years ago
5 0
For #31 you would make two squares on the left and right side and then four rectangles in the middle
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The relationship between the number of years (x) that have passed and the population (y) for a small town is shown in the table.
ZanzabumX [31]

Answer:

D. 10,699

Step-by-step explanation:

The given data for the Population Count Per Year is presented as follows;

Number of Years (x); 1, 2, 3, 4, 5, 6, 7, 8

\begin{array}{ccccccccc}Number \ of \ Years \ (x)&1&2&3&4&5&6&7&8\\Population \ (y)&1,440&1,728&2,074&2,488&2,986&3,583&4,300&5,160\end{array}The data regression equation is y = 1,200·(1.2)ˣ

Based on the regression equation for the data, the predicted value of the town's population after 12 years is given by substituting x = 12 as follows;

After 12 years, y = 1,200 × (1.2)¹² ≈ 10,699.32

Therefore, the option which is the best prediction is 10,699.

7 0
3 years ago
From a distance of 48 feet from the base of a building the angle of elevation to the top of the building is 69 degrees . Estimat
aniked [119]
You should draw a diagram
And it should make a triangle and solve using SOH-CAH-TOA (sin cos tan) relative to your angle of 69 degrees
8 0
3 years ago
Chloe drives from her house to her Grandma's house 48 miles away in an hour and 12 minutes. How fast was she driving on average?
Sphinxa [80]

Answer:

I’m pretty sure 40 mph (sister aproved)

Step-by-step explanation:

6 0
2 years ago
Read 2 more answers
Who can help me needed for tomorrow please
blagie [28]

a) 170.00 =8n -30

200= 8n

n = 200/8 = 25 items


b) since the expenses increased the profits would decrease

profit = 8(25)-40 = 200-40 = 160

170-160 = 10.00

 profit decreased by $10.00

6 0
3 years ago
Read 2 more answers
How does h
Agata [3.3K]

Answer:

h(t) = 16t changes 16 units every t. in the interval t=7 to t=2,

if its asking for:

\int\limits^2_7 {16t} \, dt

then it's

16(2) - 16(7) = 32 - 112 = -80

4 0
3 years ago
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