iris spent 2 and 1/2 studying last night she spent 1/5 of the time studying how much time did she spend studying science. How much time did she spend studying science? ( test please hurry I have 5 minutes remaining!)

Which triangles area would be calculated using the trigonometric area formula

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?

What is the absolute value of the complex number -4-sqrt2i