Apainting crew paints at a rate of 1 2 square foot per second. if the area of the walls in a house are 4500 square feet, how long does it take them to finish painting the house?

Acomputer store bought a program at a cost of $10 and sold it for $13. find the percent markup

Plz ( true - false) all triangles have interior angles whose measure sum to 90.

Which sum or difference identity would you use to verify that cos (180° - q) = -cos q? a.) sin (a -b) = sin a cos b – cos a sin b b.) cos (a -b) = cos a cos b – sin a sin b c.) cos (a -b) = cos a cosb + sin a sin b d.) sin (a + b) = sin a cos b + cos a sin b