1. If scores on an exam are normally distributed with a mean of 80% and a standard deviation of 10%, what would a score of 90% be in Z-scores (e. g., how many standard deviations is this score above or below the mean) ?

2•2=44, 3•8=2411, 2•5=107, 5•5=2510, Then 7•7=?

What is te value of x? x+4/9=3/4

Solve 5 (2x + 1) < 10.

Floyd is an aspiring music artist. He has a record contract that pays him a base rate of / $200 per month and an additional $12 for each album he sells. Last month he earned a total of $644. Write an equation to determine the number of albums (a).

Your professor has just collected eight different statistics exams. If these exams are graded in random order, what is the probability that they are graded in alphabetical order of the students who took the exam?

Who is the 18 president of the United States

Zack says that the probability of rolling a number less than 4 on a six-sided number cube is 4/6. Valeria says that the probability is 3/6. Who is correct? Explain.

The unit price of hot dogs is $0.50/hot dog. How much will 12 hot dogs cost?

The formula to convert °F to °C is C = 5/9 (F - 32). 50°C = 122 °F Why do you multiply 50 by the reciprocal of 5/9

Yan is climbing down a ladder. Each time he descends four rings on the ladder, he stops to see how much farther he has to go. Which word in the problem indicates that a negative integer should be used 1 : Climbing 2: Stops 3: Descends 4: Farther