If Your answer is right I will gave you 500 Points but I need this answer in 5 minutes

If a • b*2 = 1.8 x 10*-7, and c•b/d = 7.2 x 10*-4, find the value of a•d*2/c*2

The number of revolutions of two pulleys is inversely proportional to their diameters. if a 24-inch diameter pulley making 400 revolutions per minute is belted to an 8-inch diameter pulley, find the number of revolutions per minute of the smaller pulley.

Closing a credit card usually _your debt ratio.a. increasesb. decreasesc. improvesd. has no effect on