Math..
the circumference (c)c of a circle is 1818 centimeters. which formula can you use to find the radius (r)r if you know that c=2πrc=2πr?

a. r=c2πr=c2π

b. r=2cπr=2cπ

c. r=πc2r=πc2

d. r=2πc

Classify each polynomial by its degree and by its number of terms.

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?

Due to bad planning, two of the local schools have their annual plays on the same weekend. while 457 people attend one, and 372 attend the other, only 104 people were able to attend both. how many people went to at least one play?