Two mechanics worked on a car. The first mechanic worked for 20 hours, and the second mechanic worked for 15 hours. Together they charged a total of 3275. What was the rate charged per hour by each mechanic if the sum of the two rates was 180 per hour?

Find the roots of the equation below. x^2 - 6 + 9 = 0

Drag the tiles to the correct boxes to complete the pairs. label each function. as even , odd, or neither.

Ur environment is very sensitive to the amount of ozone in the upper atmosphere. the level of ozone normally found is 4.04.0 parts/million (ppm). a researcher believes that the current ozone level is not at a normal level. the mean of 2525 samples is 4.44.4 ppm with a standard deviation of 0.80.8. assume the population is normally distributed. a level of significance of 0.020.02 will be used. make the decision to reject or fail to reject the null hypothesis. answer tables