A certain test has a mean of 60 and a standard deviation of 12. To convert the scores to a different scale, the test makers use the following transformation: x*= 40 +0.8x What is the new mean and standard deviation? A 88,52
B 48, 12
C 48, 52
D 88, 12
E none of the above

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?

Mustafa contributes 11% of his $67,200 annual salary to his 401k plan. what is his pretax income

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?