How do you write the standard number 0.000068 in scientific notation?

6.8 * 10-4

6.8 * 10-5

6.8 * 10-7

6.8 * 10-6

Which of these graphs do not represent constant rates of change?

How many square feet will somebody need to cover the entire floor if it was 15 ft. by 18 ft

How many times does nine go into 42

Abe, a plumber, charges $50 per hour plus $75 for making an in-home visit. The Plumbing Service charges $65 per hour but no set fee for a visit. How many hours of plumbing work are needed for each to cost the same?

Explain how you would round numbers 33 and 89 to estimate their sum

Find the exact circumference of a circle with an area equal to 36 sq. in.

Angelo runs 7 miles per week and increases his distance by 1 mile each week. Marc runs 4 miles per week and increases his distance by 2 miles each week. In how many weeks will Angelo and Marc be running the same distance? What will that distance be?

3 2. DOG FOOD A bag contains 42 cups of dog food. Your dog eats 2 cups of dog food each day. How many days does the bag of dog food last?

Jane drove 260 miles using 12 gallons of gas. At this rate, how many gallons of gas would she need to drive 286 miles

Which subtraction expression has the difference 1 + 4i? (-2 + 6i) - (1 - 2i) (-2 + 6i) - (-1 - 2i) (3 + 5i) - (2 - i) (3 + 5i) - (2 + i)