Jamie used a microscope to measure the diameter of a hair. She found that the diameter of

the hair was 0.000072 meter. How is this number written in scientific notation?

A 7.2 * 10^-5

B 7.2 * 10^6

C 7.2 * 10^5

D 7.2 * 10^-6

Rewrite the equation x + y + 3 = - 2x + 4y + 18 into standard form (ax + by = c).

Stars that are medium-sized are: A. about the size of our sun B. about four times the size of our sun C. less than half the size of our sun D. more than 10 times the size of our sun

4. Solve the system of equations by inspection. Explain your reasoning. -2x+4y = 5 -2x+4y = 6

A particular model of walkie-talkie can broadcast in a circular area. The radius of the broadcast area is 10,000 feet. Find the area of this circle to the nearest square foot. Use 3.14 for pi. A. 314,000,000 ft2 B. 100,000,000 ft2 C.

Kevin has $25. MP3 download cost $.75 each. How many songs can he downloaded still have $13 to spend

Two opposite sides of a parallelogram are 3x-8 and 10x+13. Find the measure of all sides

Mr. Thompson is on a diet. He currently weighs 250 pounds. He loses 3 pounds per month. Write an equation that models Mr. thompsons weight loss.

Pearl writes down seven consecutive integers, and adds them up. The sum of the integers is equal to 6 times the largest of the seven integers. What is the smallest integer that Pearl wrote down?

If I have a circle with a radius of 50yds, what is the diameter?

In the compound interest formula, what does A stands for?