An incoming mba student took placement exams in economics and mathematics. in economics, she scored 85 and in math 86. the overall results on the economics exam had a mean of 72 and a standard deviation of 8, while the mean math score was 65, with a standard deviation of 10. on which exam did she do better compared with the other students?

Math

Step-by-step explanation:

An incoming MBA student took placement exams in economics and mathematics

Let X be the score in economics and Y be in Maths.

Overall X is N(72,8) while Y is N(65,10)

To compare both we convert both these scores to z scores

in Economic

In maths

Since z score is higher for Math, she did better in maths compared with other students than in economics.

0.85 or 85%

step-by-step explanation:

1) divide 23 by 27

2) round the decimal to the nearest 10

3) so your answer would be 0.85 or 85%

c. y = 1/4 x + 5

step-by-step explanation:

first, put the equation of the line on the graph into slope-intercept form

(y = mx + b):   y = -4x + 8

second, a perpendicular line has to have "an opposite/reciprocal slope" to the original slope. so, find the "m" value in your original equation (it's -4, right? )

original slope: m = -4   perpendicular slope: change the sign to its opposite and find the reciprocal ("flip" the number)

new slope is now positive (b/c the original slope was negative 4), and it's 1/4 (not the original slope of 4 or 4/1)