Ra'Shaela is going to the store to buy candy. She has $3.45 in dimes and quarters in her pocket. Write an equation to represent the number of dimes
and quarters that Ra'Shaela could have in her pockets

An automated water dispenser fills packets with one liter of water on average, with a standard deviation of 5 milliliter. the manual says that after a year of operation the dispenser should be tested to see if it needs recalibration. a year later a number of filled packets are set aside and measured separately. it is found that the average packet now contains about 0.995 liters. does the dispenser need calibration? explain your answer.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?

Using only the digits 5, 6, 7, 8, how many different three digit numbers can be formed if no digit is repeated in a number?