<u>Answer:</u>

<u>Step-by-step explanation:</u>
The formula for volume of a cylinder is as follows:

where:
• r = radius (? cm)
• h = height (7 cm).
Substituting the values into the formula:

Now solve for
:
⇒ 
⇒ 
⇒ 
Answer:
4x + 19 = -21
Step-by-step explanation:
4(-10) + 19 = -21
-40 + 19 = -21
Answer:
45tf+47tf=92tf
Step-by-step explanation:
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C; On this line, any two values have to add to 2.