A marketing company surveys 100 males and 100 females between the ages of 55 and 70 to determine how many times they text each d
1 answer:
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Answer:
B
Step-by-step explanation:
So we have the formula:
And we want to solve it for r.
So, let's first divide both sides by π and h. This will cancel out the right side:
Now, take the square root of both sides:
And we're done!
Our answer is B.
I hope this helps!