I'm having trouble with part b of this question. I am using the formula of z=(X-m)÷(standard deviation). Help would be so awesome. Thank you.

Solve the problem. A math teacher gives two different tests to measure students' aptitude for math. Scores on the first test are normally distributed with a mean of 22 and a standard deviation of 5. Scores on the second test are normally distributed with a mean of 71 and a standard deviation of 10.3. Assume that the two tests use different scales to measure the same aptitude. If a student scores 29 on the first test, what would be his equivalent score on the second test? (That is, find the score that would put him in the same percentile.) 078 83 86 85

Explain why it makes sense that the standard deviation of X is in the denominator of the formula calculating the standard error of the slope.

I need help on this question below The scores on the Accuplacer test and High School GPAs are normally distributed. The Accuplacer test had a mean of 35 and a standard deviation of 9. High School GPAs had a mean of 2.9 and a standard deviation of 0.2.What high school GPA do you need to equal a score of 56 on the Accuplacer test?Give answer to two decimal places.