2-4 pls help I'm confused about this

Select the correct answer from each drop-down menu. rewrite the formula to find voltage. the formula for electrical power (p, in watts) is where v is the voltage in volts and r is the resistance in ohms. for a particular brand of water heater, r is 32 ohms and p is 0.5 watts. the formula to find v is , and the voltage at which the heater operates is volts.

17 in long 1.3 ft wide and 8in high what is the volume

The value of the expression 16-^3/4 8 1/8 -6 6 1/40 1/64