Sue's car does approximately 570 miles on a full tank of 60 litres of petrol. Work out how many miles she would travel on:

Me find the missing dimension of a triangle height: 7 in., area: 21^2

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.

Determine the number of girls in a math class with 87 boys if there are 25 girls for every 75 boys