Simplify (8x^2 − 1 + 2x^3) − (7x^3 − 3x^2 + 1).

a.−5x^3 + 11x^2 − 2
b.5x^3 − 11x^2 + 2
c. x^3 + 2x^2 + x^3
d. x^3 − 2x^2 − x^3

The floor plan of a room has a scale of 2.5 in.: 35 ft. in the drawing, the length of the room is 8 in. and the width of the room is 6 in. what is the perimeter of the actual room?

Weekly wages at a certain factory are normally distributed with a mean of $400 and a standard deviation of $50. find the probability that a worker selected at random makes between $450 and $500

Campus rentals rents 2 and 3 bedrooms apartments for $700 ans $900 a month respectively. last month they had six vacant apartments and reported $4600 in lost rent. how many of each type of apartment were vacant?