If g(t) = 5t^2 - 3t - 3 and h(t) = 7t^2 + 9t - 8, find g(t) + h(t)

45 was divided by a power of ten to get 4.5. what power of ten was it divided by? people 4.5

Can someone tell me if this is perpendicular? !

Aladder that is 20ft long is leaning against the side of a building. if the angle formed between the ladder and the ground is 75 degrees how far is the bottom of the from the base of the building?