Which pair of numbers has a GCF of 8?
8 and 28
16 and 56
32 and 16
40 and 55

The long jump record, in feet, at a particular school can be modeled by f(x) = 19.6 + 2.5ln(x + 1) where x is the number of years since records began to be kept at the school. what is the record for the long jump 11 years after record started being kept? round your answer to the nearest tenth.

The perimeter of a stage is 116 feet. it is 17 feet wide. how long is it?

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).