To answer this item, we let x be the distance that Jimmy drove from his origin and back. Given the speeds, the time it takes for him to travel to and fro are, t1 = x / 46 t2 = x / 52 respectively.
The equation that would best represent the scenario is, x/46 - x/52 = 0.6 The value of x from the equation is 239.2.
The trip there takes x/46 which is equal to 239.2/46 which is also equal to 5.2 hours. The travel from the cabin back took 4.6 hours.
"return on investment" is the best measure of the efficiency of an investment, but it should be noted that there are other indicators of how well an investment is doing.
The perimeter of the rectangle will be measured in millimeters (or some other distance measure). Square millimeters is an incorrect unit for a perimeter.