A 20-meter ladder is sliding down a vertical wall so the distance between the top of the ladder and the ground is decreasing at 8 meters per minute. At a certain instant, the top of the ladder is 12 meters from the ground.
What is the rate of change of the distance between the bottom of the ladder and the wall at that instant (in meters per minute)?

134.6 us dollars

step-by-step explanation:

1 us dollar = 1.33 canadian dollars

so, 150 us dollars = 150 × 1.33 = $199.5.

in canada, the money mitchell spent = 20 canadian dollars.

remaining canadian dollars with him = 199.5 - 20 = 179.5.

after mitchell returned to us, he exchanged the remaining canadian dollars to us dollars.

179.5 canadian dollars = 179.5 × 0.75 = 134.6 us dollars.