Answer:
The perimeter of a semicircle includes the arc and the diameter. Here are some formulas that you can use.
Step-by-step explanation:
P = C / 2 + d
where C is the circumference of the whole circle
P = π r + 2r
where r is the radius
P = (2 + π) r
P = (d π / 2) + d
P = d π / 2 + 2 d / 2
P = (d π + 2 d) / 2
P = (2 + π) d / 2
Found at this website here: https://www.quora.com/What-is-the-formula-for-the-perimeter-of-a-semicircle
Hope this Helped! Good Luck!
Answer: the answer is D, because when you divide 36/40 it equals to .9 which is closers 1
Step-by-step explanation:
A) is 2x
b) is

c) is -2x
I think these are correct.
![log_{10}1000^{x] = log_{10}10^{2x}=2x](https://tex.z-dn.net/?f=log_%7B10%7D1000%5E%7Bx%5D%20%3D%20log_%7B10%7D10%5E%7B2x%7D%3D2x)
I did similar things to get other answers
8 different styles
4x2=8
If you want to answer future questions like this then you multiply the numbers of the items.
Answer:
Part a) 
Part b) 
Part c) 
Step-by-step explanation:
Part a) What is the volume of your friend's swimming pool?
we know that
The volume of a rectangular prism is equal to

substitute the values

Part b) Your swimming pool is in the shape of a cylinder with a diameter of 16 feet and has the same volume as your friend's pool. What is the height of your pool?
we know that
The volume of a cylinder is equal to

we have

----> the radius is half the diameter
substitute and solve for h



Part c) While you were on vacation, 6 inches of water evaporated from your pool. About how many gallons of water evaporated from your pool?
remember that

so

Find the volume of water for 

so
the volume of water evaporated is equal to

convert to gallons
remember that

so
