On a dvd, information is stored on bumps that spiral around the disk. there are 73,000 ridges (with bumps) and 73,000 valleys (without bumps) across the diameter of the dvd. what is the diameter of the dvd in centimeters? round your answer to the nearest whole number.

What is the length of the segment joining the points at (4,5) and (6,-2) round to the nearest tenth if necessary

Solve 2x2 + 8 = 0 by graphing the related function. there are two solutions: . there are no real number solutions. there are two solutions: 2 and -2

Aroulette wheel has 38 slots in which the ball can land. two of the slots are green, 18 are red, and 18 are black. the ball is equally likely to land in any slot. the roulette wheel is going to be spun twice, and the outcomes of the two spins are independent.the probability that it lands one time on red and another time on black in any order is(a) 0.5 (b) 0.25 (c) 0.4488 (d) 0.2244