There are 37 more cats than dogs in an animal shelter. if there are 78 cats at he shelter, how many dogs are there?

With finding limits of multi variable !

Aboard 60 in. long is cut two parts so that the longer piece is 5 times the shorter. what are the length of the two pieces?

Use the method of cylindrical shells to find the volume v generated by rotating the region bounded by the curves about the given axis. y = 7ex, y = 7e^-x, x = 1; about the y-axis