You buy a surround sound system and speakers for your living room for $795. Each year, the value of the system decreases by 4%. 1a. Write an exponential model for this situation.

1b. Determine the value of the system after 3 years​

What is the solution of sqrt x+2-15=-3

Assume that the weights of quarters are normally distributed with a mean of 5.67 g and a standard deviation 0.070 g. a vending machine will only accept coins weighing between 5.48 g and 5.82 g. what percentage of legal quarters will be rejected? round your answer to two decimal places.

The radius of the earth is two times the radius of the moon. what fraction of the volume of the earth is the volume of the moon?