Story Problems Evaluate the Expression/ Simplify Factor/ Scientific Notation ExponentsWhat is x?

Renting a rug shampooer costs $5.25 per hour plus $4.25 for the shampoo. Find the cost of shampooing a rug if the time required is 3.5 hours.

The area of the Pacific Ocean is about. This represents 32% of Earth’s area. What is the approximate area of Earth?

The enrollment at a university increased from 14,000 students to 16,000 students over a period of 5 years. What is the percent increase in enrollment?

Suppose the average attendance at a local high school’s football game went down from 2000 people in 2003 to 1700 people in What was the percent decrease in attendance at the football games?

The number of physicians in the United States has been rising at the rate of about 17,000 per year since 1980, when there were about 467,700 physicians. Predict how many physicians there will be in the year 2010.

Determine whether the following are rational or irrational:

when x = 15 and y = -10 Evaluate:

Simplify:

when x =3 and y =2 Evaluate:

Factor:

Multiply and write your answer in scientific notation:

Divide and write your answer in scientific notation:

Simplify:

Solve for x: