Easy question for 15 points

Write each expression in exponential form and find its value. 2 x 2 x 2 x 2

Evaluate the integral. (sec2(t) i t(t2 1)8 j t7 ln(t) k) dt

Amerchant has coffee worth $60 a pound that she wishes to mix with 50 pounds of coffee worth $90 a pound to get a mixture that she will sell for $70 a pound. how many pounds of the & 60 coffee should be used?