Which of the following is a valid use of the associative property of addition? A. (5+8.5) - 3.5 = 5+ (8.5-3.5)
B. (8.5+5) -3.5=(8.5-3.5)+5

Identify an equation in point slope form for the line perpendicular to y=3x+5 that passes through (4,-1)

Aquantity with an initial value of 3900 decays exponentially at a rate of 35% every hour. what is the value of the quantity after 0.5 days, to the nearest hundredth?

If $740 is invested at an interest rate of 11% per year and is compounded continuously, how much will the investment be worth in 7 years? use the continuous compound interest formula a = pert.