How much money will there be in an account at the end of 10 years if $3000 is deposited at 3% interest compounded semi-annually? (Assume no withdrawals are made. Use the formula A=P
-p(1-4)
for compound interest,

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?

The areas of two similar triangles are 72dm2 and 50dm2. the sum of their perimeters is 226dm. what is the perimeter of each of these triangles?

What is the distance between the points (2, 5) and (5,9)?