Write 0.7 as a fraction 15. use a calculator to evaluate cach expression. round answers to two decimals (1.125x024) b0.52+(-1.7 ? . (-1..33) d. -5.45+(-0.125 21, 24 is 70% of what number? 22. in a study, 35o women tried a new diet. pounds the first week of the study, how many women in this group lost at least five pounds? if95% ofthe women lost at least five 26. find the point-slope equation of the line perpendicular to the line y- 2x+5 passing through the point (1, 4).

Four airplanes carrying a total of 400 passengersarrive at the detroit airport. the airplanes carry, respectively,50, 80, 110, and 160 passengers.a) one of the 400 passengers is selected uniformly at random.let x denote the number of passengers that were on theairplane carrying the randomly selected passenger. find var(x)for x as given in the problemb) one of the 4 airplane drivers is also selected uniformly atrandom. let y denote the number of passengers on the chosen driver’s airplane. find var(y) for y as given in the problem

The brain volumes (cm cubed) of 50 brains vary from a low of 904 cm cubed to a high of 1488 cm cubed. use the range rule of thumb to estimate the standard deviation s and compare the result to the exact standard deviation of 175.5 cm cubed, assuming the estimate is accurate if it is within 15 cm cubed

He mass of a single atom of carbon can be found by dividing the atomic mass (12.01 g) by 6.022 x 10^23. which is the mass of a single carbon atom, correctly written in scientific notation with the correct number of significant figures?