Scientific Notation (EE3/EE4) Practice Test

The U.S. Department of Agriculture states that the US has about 1,900,000,000 billion acres of land. How would that number be represented in scientific notation?

• 1.9 * 10¹⁰

• 1.9 * 10⁹

• 19 * 10¹⁰

• 19 * 10¹⁰

The number of live trees on North Carolina's timberland in 2016 was estimated at 14,470,000! Which is closest to that number written in scientific notation?

• 14.47 x 10⁸

• 14.47 x 10⁷

• 1.4 x 10⁷

• 1.4 x 10⁸

Jupiter is about 462,830,000 miles from the Sun, Uranus is about 1,820,000,000 miles from the Sun, and the tiny, icy, dwarf planet, Pluto, is 3,670,000,000 miles from the Sun. Which three of these statements are correct?

• Jupiter is about 4.6 x 10⁹ miles from the Sun and Pluto is about 3.7 x 10⁹ miles from the Sun.

• Uranus is about 1.8 x 10⁹ miles from the Sun and Pluto is about 3.7 x 10⁹ miles from the Sun.

• Jupiter is about 4.6 x 10⁸ miles from the Sun and Uranus is about 1.8 x 10⁹ miles from the Sun.

• Jupiter is about 4.6 x 10⁸ miles from the Sun and Pluto is about 3.7 x 10⁹ miles from the Sun.

• Jupiter is about 4.6 x 10⁹ miles from the Sun and Pluto is about 3.7 x 10¹⁰ miles from the Sun.

The bacterium that causes Bubonic Plague has a diameter of approximately 0.00065 mm, the parasite that causes Malaria has a diameter of approximately 0.002 mm, and the virus that causes Covid19 has a diameter of roughly 0.00006 mm. Which three of these statements are correct?

• The parasite has a diameter of 2.0 x 10^-3 mm, and the bacterium has a diameter of 6.5 x 10^-4 mm.

• The bacterium has a diameter of 6.5 x 10^-5 mm, and the virus has a diameter of 6.0 x 10^-5 mm.

• The parasite has a diameter of 2.0 x 10^-3 mm, and the virus has a diameter of 6.0 x 10^-5 mm.

• The bacterium has a diameter of 6.5 x 10^-4 mm, and the virus has a diameter of 6.0 x 10^-6 mm.

• The bacterium has a diameter of 6.5 x 10^-4 mm, and the virus has a diameter of 6.0 x 10^-5 mm.

On average, the San Andreas Fault moves at a rate of approximately 95 ten-thousandths of a meter per day. Which of these represents the approximate rate at which the boundary moves?

• 9.5 x 10^-5

• 9.5 x 10^-6

• 9.5 x 10^-3

• 9.5 x 10^-4

The speed of sound in air is approximately 13,488 inches per second. Which of these expressions represents the approximate number of seconds it takes for sound to travel 1 inch?

• 1.3 x 10^-4

• 1.3 x 10^-5

• 1.3 x 10⁵

• 1.3 x 10⁴

Astronomers and scientists estimate that the Milky Way contains between 1.0 x 10¹¹ to 4.0 x 10¹¹ stars. Which of these is the approximate number of stars in our galaxy?

• a couple of billion stars

• tens of billions stars

• hundreds of billions stars

• over a trillion stars

Blue light with a wavelength of approximately 450 nanometers has a frequency of about 667,000,000,000,000 hertz. Which of these is the frequency of blue light?

• 6.7 x 10¹⁴

• 6.7 x 10¹⁵

• 10 x 6.7¹⁴

• 10 x 6.7¹⁵

Amazon has been known to process as many as 7.4 x 10⁹ orders in a month! Which of these is the approximate number of orders that Amazon processed during that month?

• 74 billion

• 7.4 billion

• 740 million

• 749,000

Rounding to the nearest ten-thousand, solve for y.

y² = (8 x 10⁵)(5 x 10⁵)