Carly sold 18 rolls of wrapping paper. That is 2 times as many rallsas Jasmine sold. How many rolls of wrapping paper did they sell altogether?

What kind of bond pays interest which is exempt from tax?

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.

Find dy/dx using implicit differentiation ln(20+e^xy)=y