It really depends what you're understanding or how the problem is set up.
17. 9
18. 12
19. 16
20. 56
21. 143
22. 14
23. 27
24. 7
Answer:
The surface area of the second cylinder is equal to 
Step-by-step explanation:
we know that
If two figures are similar then
the ratio of their surfaces areas is equal to the scale factor squared
Let
z-------> the scale factor
x------> the surface area of the smaller cylinder (second cylinder)
y-------> the surface area of the original cylinder (first cylinder)
so

Step 1
Find the scale factor

Step 2
Find the surface area of the second cylinder
we have


substitute and solve for x


Answer:
1080"
Step-by-step explanation:
12*10= 120
120*9= 1080
<span>You can remember by the acronym: PEMDAS which stands for p<span>arenthesis, exponents, multiply, divide, add, subtract
So you start with anything in parenthesis
</span></span>