the jeans store sells 7 pairs of jeans per day when it charges $100 per pair. It sell 8 pairs of jeans per day at a price of $90 per pair. The MR of the eighth pair of jeans is

It's a snowy day and you're pulling a friend along a level road on a sled. you've both been taking physics, so she asks what you think the coefficient of friction between the sled and the snow is. you've been walking at a steady 1.5m/s, and the rope pulls up on the sled at a 32 ∘ angle. you estimate that the mass of the sled, with your friend on it, is 65 kg and that you're pulling with a force of 80 n .