Nayeli goes out to lunch. The bill, before tax and tip, was $18.40. A sales tax of 9% was added on. Nayeli tipped 12% on the amount after the sales tax was added. How much was the sales tax? Round to the nearest cent.

The number of potato chips in a bag is normally distributed with a mean of 71 and a standard deviation of 2. approximately what percent of bags contain between 69 and 73 potato chips? approximately 68% approximately 71% approximately 95% approximately 99.7%

Is the point (0, 8) on the x-axis or y-axis? how do you know?

Can someone me with #s 8, 9, and 11. with just one of the three also works. prove using only trig identities.