Chspe Math Practice

If Morgan tosses a fair coin 4 times, what is the probability that he will get exactly two heads and two tails? Correct Answer- 1. 2 x 2 x 2 x 2 = 16 possibilities. 2. Make a systematic listing : HHTT HTHT TTHH THTH THHT HTTH 3. There are 6 outcomes with 2H and 2T, so 6/16 = 3/8 Shopmart is selling a multi-disk DVD sets of Dr. Who episodes at $2 per-disk discount from its usual price of $15.95. What is the percentage reduction, to the nearest whole percent, on these disks? Correct Answer-amount off / original price = 2/15.95 = 12 percent Approximately how great was the average annual percentage difference in the unemployment rate from the peak of the Great Recession to 2016? Correct Answer-Highest value = 10 percent est. Lowest value = 4 percent est. 10-4 = 6 6 percent divided by 6 years = 1 percent per year What is the ratio of the slope of line A (2,4) to line B (4,1) ? Correct Answer-Find the slop of both lines to determine their ratio. - the slope is the ride divided by the run - 4/2 = 2 & ¼ the ratio is 2/ ¼ - multiply both top and bottom by 4 = 8/1 Mean, Median, Mode Correct Answer-*Mean:* Add all #, then divide by how many # there are ~"Average" *Median:* Middle # of ordered (Least to Greatest) list. If # are even, then the 2 middle # averaged out. *Mode:* tthat occurs the MOST. Can be more than one. Range: Subtracting the minimum value from maximum value Volume of a cylinder Correct Answer-V=πr²h Celsius to Fahrenheit Correct Answer-(C x 1.8) + 32 Fahrenheit to Celsius Correct Answer-(F-32)/1.8 circumference of circle Correct Answer-2πr Range Correct Answer-distance = rate x time slope int. form Correct Answer-y = mx + b y= intercept m = slope slope of line through points Correct Answer-m = (y2-y1) (x2-x1) Volume of a cube Correct Answer-LxWxH - A circle has one square circumscribed. What is the ratio of the circumscribed to the inscribed one? Correct Answer- 36 IN Correct Answer-A YARD