You deposit $150 in a savings account that earns simple interest at a rate of 5.5% per year. how much interest will you have earned after 4 years?
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Its due ! write an equation in which the quadratic expression 2x^2-2x 12 equals 0. show the expression in factored form and explain what your solutions mean for the equation. show your work.

Asap! i'm not good math and i'm lost.

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