An attempt to find the probability of there being a right-handed or a left-handed batter at the plate in a baseball game. The first event is the 1st batter to come to the plate. The second event is the
second player to come up to the plate.

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?

If f(x)= 3x+6 which of the following is the inverse of f(x)

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?