Answer:
12
Step-by-step explanation:
Then the -12 and +12 will cancel out, so you're left with a clean isolated r on the left:
r -12 +12 = 19 + 12
r = 31
WE NEED THE FREAKIN' POINTS
3.9 and 5.3, when rounded off and mult. together, produce the product 20.
Thus, the decimal point must follow the first two digits of your answer, whether estimate or "exact."
3.9*5.3 = 20.67 by calculator.
Answer:
452.39 mi^2
Step-by-step explanation:
A = πr^2
A = π (12mi)^2
A = 452.39 mi^2
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Please mark Brainliest :D