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

Given the position vector of the particle r(t)=(t+1)i+(t^2−1)j+2t k, find the particle's velocity and acceleration vectors at t=1

Arrange the images in order to show how lake-effect snow occurs.

Why is rain likely when warm, moisture-laden air meets cold air? a) the lighter warm air will rise and cool down, causing condensation and rain. b) the cold air moves faster and pushes the warm air away, causing condensation and rain. c) the moisture in the warm air condenses on contact with the cold air, causing rain to fall. d) the cold air mixes with the warm air, reducing its temperature causing moisture to condense.