(3 x 10^19) + (2 x 10^19) + (2 x 10^19)

Which expression is equivalent to (3^2)^-2 a.-81 b.-12 c.1/81 d.1/12

Describe the 2 algebraic methods you can use to find the zeros of the function f(t)=-16t^2+400.

Alcoa was $10.02 a share yesterday. today it is at $9.75 a share. if you own 50 shares, did ou have capital gain or loss ? how much of a gain or loss did you have ? express the capital gain/loss as a percent of the original price