4. Nora deposited $100 into a saving account that pays an interest rate for one year. At the end of the period, Nora earned $25 as total interest.
Find the annual interest rate for Nora's account or rate of return.
I

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.

Which of the following points is collinear with (-2,1) and (0,3)

Emily is entering a bicycle race for charity. her mother pledges $0.90 for every 0.75 mile she bikes. if emily bikes 18 miles, how much will her mother donate?