What is the cost of an item with a sales tax of $108?

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

Find the unit rate for: 75% high-fiber chimp food to 25% high -protein chimp food.

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