Solve the problem. the systolic blood pressures of the patients at a hospital are normally distributed with a mean of 136mm hg and a standard deviation of 13.8mm hg find the two blood pressures having these properties: the mean is midway between them and 90% of all blood pressures are between them.

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?

Roger could feed 5 walruses with 4 kilograms of fish. how many walruses could he feed with 7.2 kilograms of fish?

If i had 1234 apples and 1 banana what is the total amount