Scores on a test have a normal distribution with mean 20. 95% of the test scores are between 13 and 27. What is the
standard deviation of test scores?

Adriana sold 50 shares of a company’s stock through a broker. the price per share on that day was $22.98. the broker charged her a 0.75% commission. what was adriana’s real return after deducting the broker’s commission? a. $8.62 b. $229.80 c. $1,140.38 d. $1,149.00

Consider the function f(x)=-5x+3 what is f(-2)

Pls the last one and it has to be like number 6