Answer:
D. 9:1
Step-by-step explanation:
The formula for the volume of a cylinder is πr² · h (pi · radius² · height) (use 3.14 for pi).
The two right circular cylinders have the same height. The larger cylinder has a radius that is three times the size of the smaller radius.
4 · 3 = 12
However, in the equation for volume, the radius is squared. Because of this, the larger cylinder is 9 times the size of the smaller cylinder because 3² = 9.
You can check your work by finding the volume of the two cylinders using the volume formula πr² · h:
3.14 · 4² · 5 = 251.2
3.14 · 12² · 5 = 2,260.8
The cylinder with a radius of 12 cm is 9 times the size of the cylinder with a radius of 4 cm.
2.260.8 ÷ 9 = 251.2
A is the answer hope this helps
Answer:
Decreased by 40%!
Step-by-step explanation:
At first it goes down by 10%, then 30%, so you just add them together and get decreased by 40%.
The answer to these 2 questions would be:
1.
.8 is greater than .7.
or.
.7 is less than .8.
Why?
.8 is .1 higher than .7.
.7 + .1 = .8, so the greater than would be placed facing the .8.
2.
.8 is less than 7.
or.
7. is greater than .8.
Why?
You see where the decimal is placed at? It is placed after the 7 which makes the 7. a whole number. While .8 is still a decimal, 7. is way higher than .8 because of where the decimal is at.
This is how we get both our answers, 1. .8 and 2. 7.
Hope this helps!~
