Skyler has twice as many apples in her grocery bag as her friends Macy and Janelle combined. Macy has 15 apples
in her bag, Skyler has 50 apples in her bag. How many
apples does Janelle have in her grocery bag?

Describe a way that someone could estime the length of a book

What is the length of the missing leg in this right triangle? 18 mm 24 mm 26 mm 32 mm

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.