### Variation Problems

Solve each variation problem: 1. If m varies jointly as z and p, and m=10 when z=2 and p=7.5, find m when z=5 and p=7. 2. Current in a circuit: The current in a simple electrical circuit varies inversely as the resistance. If the current is 50 amps when the resistance is 10 ohms, find the current if the resistance is 5