Carlos wants to have an average of at least 90% on his tests for semester 1. So far he has scored: 95%, 87%,
and 88%. What is the minimum he must get on the next
test to maintain the 90% average?

Write the sentence as an equation. z plus 372 is equal to 160

Data are collected to see how many ice-cream cones are sold at a ballpark in a week. day 1 is sunday and day 7 is the following saturday. use the data from the table to create a scatter plot.

Monthly water bills for a city have a mean of $108.43 and a standard deviation of $32.09. find the probability that a randomly selected bill will have an amount greater than $155, which the city believes might indicate that someone is wasting water. would a bill that size be considered unusual?