the value of the sample mean difference is if the difference scores reflect the results of the exam after the course minus the results of the exam before the course. a. 68 b. 0 c. 400 d. 50

Lindsay is creating a bridge out of dried pasta and glue. in her plans, she sketches the graph to determine the lengths of the noodles, in centimeters, needed for the arch to increase the length of the bridge in 1 centimeter increments.which function did lindsay use to create her design? f(x) = (x – 5)2 + 8 f(x) = –(x + 5)2 + 8 f(x) = 0.5(x + 5)2 + 8 f(x) = –0.5(x – 5)2 + 8

Which one ? is the answer and how to find this answer

50 points~ ! i have to turn this in tomarrow