Multiplying Dividing Writing Scientific Notation

A factory can make 3 x 10⁴ t-shirts per day, how many t-shirts will it make in 2.5 x 10² days?

• 7.5 x 10⁶

• 6.5 x 10⁶

• 7.5 x 10⁸

• 7.5 x 10²

The US spends on average 10,200 dollars on each student per year. There are about 77,000,000 students in the United States. About how much money total is spent on students each year? (Put both numbers in scientific notation first!)

• 86.24 x 10¹¹

• 7.854 x 10²⁸

• 8.624 x 10¹¹

• 7.854 x 10¹¹

A blue whale can eat 3 x 10⁸ krill in a day. All of that krill weighs approximately 6.3 x 10⁹ pounds. About how much does each krill weigh? Give your answer in standard form.

• 210 pounds

• 0.21 pounds

• 2.1 pounds

• 21 pounds

The Earth has a mass of about 1 x 10²⁵ kg. Neptune has a mass of 1.8 x 10²⁷ kg. How many times larger in Neptune than Earth? Give your answer in standard form.

• 180

• 1.8

• 18

• 1,800

McDonald's has about 210,000 managers and each makes on average 39,000 dollars per year. How much money does McDonald's spend on managers each year? Give your answer in scientific notation.

• 8.19 x 10²⁰

• 8.19 x 10⁹

• 81.9 x 10¹

• 0.819 x 10⁹

During the school year, each student planted 2 x 10² trees as part of a community service project. If there are 3.5 x 10³ students in the school, how many trees did they plant in total?

• 7 x 10⁵

• 0.7 x 10⁵

• 70 x 10⁵

• 7 x 10⁶

The debt in the United States is now near 1.8 x 10¹³ dollars and there are about 300 million people in the United States. If every person paid their fair share of the debt, approximately how much would that be per person? Give your answer as money in standard form.

• $6,000

• $600

• $600,000

• $60,000