Answer:
Negative + Negative = Positive
Negative + Positive = Negative
Positive + Negative = Negative
Positive + Positive = Negative
The rules are the same for division.
Step-by-step explanation:
Exact Surface Area = 378pi
Approximate Surface Area = 1186.92
The approximate surface area uses pi = 3.14
The units are cm^2 or "square cm".
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Work Shown:
SA = surface area of cylinder
SA = 2*pi*r^2 + 2*pi*r*h
SA = 2*pi*7^2 + 2*pi*7*20
SA = 2*pi*49 + 2*pi*140
SA = 2*49*pi + 2*140*pi
SA = 98pi + 280pi
SA = 378pi ..... exact surface area
SA = 378*3.14
SA = 1186.92 ..... approximate surface area
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Side note: The diameter 14 cuts in half to get the radius r = 7
Answer:
I think it's C but I might be
Step-by-step explanation:
40$. 7hrs
X$. 1hr
X=40•1/7
X~5.71 $ per hour
2x = 8 ... therefore x = 4
4^2 = 16
