When Boubacar commutes to work, the amount of time it takes him to arrive is normally distributed with a mean of 21 minutes and a standard deviation of 4 minutes. Using the empirical rule, what percentage of his commutes will be between 9 and 33 minutes?

Amonument at a park is in the shape of a right square pyramid. a diagram of the pyramid and its net are shown. what is the surface area of the monument? enter the answer in the box. m²

The diameter of a circular chip is doubled to use in a new board game. the area of the new chip will be

Match each equation with the operation you can use to solve for the variable. subtract 10. divide by 10. divide by 5. subtract 18. multiply by 10. add 18. add 10. multiply by 5. 5 = 10p arrowright p + 10 = 18 arrowright p + 18 = 5 arrowright 5p = 10 arrowright