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Which of the following would be a reasonable estimate for the weight of a pencil?

• 1x10^-20 lb

• 1x10² lb

• 1x10²⁰ lb

• 1x10^-2 lb

Tags

CCSS.8.EE.A.3

A possible wavelength for the color blue is 0.000000492 meter. Which of the following is a reasonable estimate for this wavelength for the color blue.

• 5x10⁶ m

• 5x10⁷ m

• 5x10^-6 m

• 5x10^-7 m

Tags

CCSS.8.EE.A.3

The population of Oklahoma City was approximately 560,000 in 2009. The population of Oklahoma City was approximately 445,000 in 1990. What is the difference between the approximated populations of Oklahoma City?

• 1.15 x 10⁵

• 2.493 x 10¹²

• 1.005 x 10⁶

• 1.15 x 10⁶

Tags

CCSS.8.EE.A.4

Which shows the expression below in simplified form.

(5 x 10⁴) x (4 x 10^-4)

• 2 x 10²

• 9 x 10⁰

• 2 x 10^-1

• 2 x 10¹

Tags

CCSS.8.EE.A.4

Which shows the expression below simplified?

(5x10^-5) x 0.00008

• 4 x 10^-10

• 4 x 10^-9

• 4 x 10²⁵

• 1.3 x 10²⁵

Tags

CCSS.8.EE.A.4

Kevin had to measure the diameter of a hair strand and the diameter of a grain of sand for hie science experiment. He found the diameter of the hair strand to be 0.00006 inches and the diameter of a grain of sand to be 1.3 x 10^-3 inches.

The diameter of the grain of sand is _______ x 10-3 inches more than the diameter of the hair strand.

• 4.6

• 1.24

• 7.8

• 1.36

Tags

CCSS.8.EE.A.4