20. Miguel started with $50 in his bank account. He
deposited $20. The next day
he withdrew $40. How much
is in his bank account?

In simplified exponential notation, the expression a^2•a^-3•a 1/a 0

Leslie started last week with $1200 in her checking account. during the week, she wrote the checks below.

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