Aubrey's dinner cost $85\$85$85dollar sign, 85. She tips the waitstaff 30%30\%30%30, percent for excellent service. How much does Aubrey tip the waitstaff?
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Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

0if x and y vary inversely and y=6 as x=7, what is the constant of variation?

David estimated he had about 20 fish in his pond. a year later, there were about 1.5 times as many fish. the year after that, the number of fish increased by a factor of 1.5 again. the number of fish is modeled by f(x)=20(1.5)^x. create a question you could ask that could be answered only by graphing or using a logarithm.