A coin dealer is having paper wraps made to go around stack of coins. The coins have a diameter 12 mm, and the dealer states that the paper should be exactly 36 mm wide, or 3 times the diameter, to go around the coins. Is the coin dealer correct.

Aswimming pool has an input pump for filling the pool and an output pump for emptying the pool. the input pump can fill the pool in 3 hours, and the output pump can drain the pool in 5 hours. as you go to bed, the pool is full, but a neighbor’s kid turns on the output pump. at midnight, you awake to find the pool half empty. immediately, you turn on the input pump, but you are sleepy and forget to turn off the output pump. at what time will the pool become full?

Three times the sum of a number and seven is negative thirty-six. what is the number?

Find the missing variable for a parallelogram: a = latex: 28in^2 28 i n 2 h = b = 6.3 in (1in=2.54cm)