This year there are 260 students in the 7th grade. Next year the school expects to have 290 students. What is the percent increase?

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

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

Which of the following is the sum of 3 1/6 + 6 3/8?