Which equations illustrate the commutative property of multiplication?
choose exactly two answers that are correct.
a.
-1/2 • 3.4 = 3.4 • (-1/2)
b.
–8 • (5 + 3.1) = (5 + 3.1) • (–8)
c.
–4 • (5 + 7.1) = –4 • 5 + (–4) • 7.1
d.
–8 • (4 • 1) = (–8 • 4) • 1

Aswimming pool had 2.5 million liters of water in it. some water evaporated, and then the pool only had 22 million liters of water in it. what percent of the water evaporated?

Scott’s bank account showed a balance of $750 on sunday. during the next five days, he made one deposit of $140 and numerous withdrawals of $180 each. let x represent the number of withdrawals that scott made. write an inequality that can be used to find the maximum number of withdrawals that scott could have made and maintain a balance of at least $100. do not use a dollar sign ($) in your response.

Amachine part consists of a half sphere and a cylinder, as shown in the figure. the total volume of the part is π cubic inches.