4. If the scores in a Probability and Statistics test are normally distributed with a mean of 31 and standard deviation of 4.5. What is the z-score for a
score of 40?
A.1
B. 2
C. 2.5
D. 3​

Can someone me with my math problem pls my teacher is on my back about this

What is the area of a rectangle with vertices (-8,-2), (-3,-2), (-3,-6), and (-8,-6)? units

Step by step explanation pls for 10 pts the length of a rectangular board is 3 feet less than twice its width. a second rectangular board is such that each of its dimensions is the reciprocal of the corresponding dimensions of the first rectangular board. if the perimeter of the second board is one-fifth the perimeter of the first, what is the perimeter of the first rectangular board?