Write the expression using a positive exponent. Leave in fraction form and do not expand numbers, leave in exponential form. For example, 2^-7 write as 1/2^7, do NOT write as 1/128 or 0.0078125. NO SPACES!

4w^-1

Paul’s car is 18 feet long. he is making a model of his car that is 1/6 the actual size. what is the length of the model?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?

Micheal is 4 times as old as brandon and is also 27 years older than brandon. how old is micheal