Which is the simplified form of r^-7 + s^-12? arrows to the left of -7 and -12 represent exponents, options are, a. 1/r^7s^12 b. -r^7 - s^12 c. r^7/s^12 d.1/r^7 + 1/s^12

If np3 /nc2 = 6, find the value of n

Anita has a success rate of 80% on free throws in basketball. she wants to know the estimated probability that she can make exactly four of five free throws in her next game. how can she simulate this scenario? categorize each simulation of this scenario as correct or incorrect.

Benjamin believes that ¼ % is equivalent to 25%. is he correct? why or why not?