Howard is rock climbing. He descended 300 meters in 5 hours. Which is NOT equivalent to Howard’s average change in location per hour? A. 300/-5 meters per hour B. -300/5 meters per hour C. -(300/5) meters per hour D. -(-300/5 meters per hour

Aparallel system functions whenever at least one of its components works. consider a parallel system of n components, and suppose each component works independently with probability 0.5. find the conditional probability that component n works given that the system is working

Complex numbers multiply √-4 * √-25 and show all intermediate steps. alternative notation is sqrt(-4) * sqrt(-25).

You are standing next to a really big circular lake. you want to measure the diameter of the lake, but you don't want to have to swim across with a measuring tape! you decide to walk around the perimeter of the lake and measure its circumference, and find that it's 400\pi\text{ m}400? m. what is the diameter dd of the lake?