C3 Mod 5 Topic 1 Practice Test

One acre is equal to 4840 square yards. How many square yards, expressed in scientific notation, are there in 450 acres?

• 2.178 x 10⁵

• 2.178 x 10⁶

• 2.178 x 10⁷

• 2.178 x 10⁸

• 0

• 1

• 5

• 7

The length of a micrometer is approximately 0.00003937 inch. How would you express this in scientific notation?

• 0.3937 x 10⁻⁴

• 3.937 x 10⁻⁵

• 3.937 x 10⁻⁶

• 3937 x 10⁻⁸

Blood vessel size varies greatly. A large blood vessel, such as the aorta, has a diameter of about 2.5 x 10⁻² meters, while a small blood vessel, such as a capillary, has a diameter of about 8 micrometers. If one micrometer = 10⁻⁶ meters, how many times greater is the diameter of the aorta than a capillary?

• 1.7 x 10²

• 1.7 x 10⁴

• 3.125 x 10⁻³

• 3.125 x 10³

Callie determined that there are 4⁶ students in her middle school. How many students are in her middle school?

• 24

• 46

• 1024

• 4096

The National Park Service manages approximately 84,000,000 acres of federal land. How would you express this number using scientific notation?

• 8.4 x 10⁻⁷

• 8.4 x 10⁶

• 8.4 x 10⁷

• 8.4 x 10⁸

Devon checked a web site that gave daily updates on distances from Earth. He found that Pluto was 31.514 astronomical units (AU) from Earth. One AU = 149,600,000 kilometers. How many kilometers is Pluto from Earth expressed in scientific notation? Round the mantissa to the nearest thousandth.

• 4.714 x 10⁷

• 4.714 x 10⁸

• 4.714 x 10⁹

• 4.714 x 10¹⁰

A large bacterium measures 750 micrometers in diameter. One micrometer = 10^-6 meters. How would you express the diameter of the bacterium in meters using scientific notation?