In a school there are 542 girls and boys. how many pupils are there in that school?

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.

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

Write the pair of fractions as a pair of fractions with a common denominator