In 2007, it is estimated that the united states used about 101,000 quadrillion thermal units . if u. s energy consumption increases at a rate of about 0.5% annually, what amount of energy will the united states use in 2020? (show the work)

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.

Anyone? 15m is what percent of 60m; 3m; 30m; 1.5 km?

What is the perimeter of an isosceles triangle with each leg measuring 2x+3 and the base measuring 6x-2?