Which expression has a positive value?

(-5)(-9)

2-4

12\(-4)

-3+(-7)

1: 4 if the wew 35 surfboards at the beach how many were short boards?

If my mom gets $13.05 an hour, and she works from 3: 30 to 10: 45 in the morning, how much money does my mom make?

Find the volume of the solid whose base is the region bounded by f(x), g(x) and the x-axis on the interval [0, 1], and whose cross-sections perpendicular to the y-axis are squares. your work must show the integral, but you may use your calculator to evaluate it. give 3 decimal places for your answe