Computing With Scientific Notation

The Earth is approximately 90,000,000 miles from the sun.  How long does it take light from the sun to reach the earth?  Use the speed of light to be approximately 2 x 10⁵ miles per second.

• 4.5 x 10² seconds

• 4.5 seconds

• 2.2 x 10² seconds

• 4.5 x 10¹ seconds

Solve:
(6 x 10⁶) / (2 x 10³)

• 12 x 10³

• 3 x 10⁹

• 1.2 x 10⁴

• 3 x 10³

(9 x 10¹⁸) ÷ (3 x 10¹⁶)

• 3 x 10²

• 6 x 10²

• 27 x 10³⁴

• 3 x 10³⁴

(9 x 10^–6) / (3 x 10^–3)

• 27 x 10^–9

• 3 x 10^–3

• 3 x 10^–9

• 27 x 10^–3

(20 x 10⁵⁰) / (4 x 10¹⁵)

• 2.4 x 10⁵¹

• 5 x 10⁶⁵

• 8 x 10⁶⁶

• 5 x 10³⁵

A microgram is equal to 1 x 10 ^-6 grams. How many times greater than a microgram is 1 x 10² grams? 

• 1 x 10^-8

• 1 x 10^-4

• 1 x 10⁴

• 1 x 10⁸

The mass of he sun is 1.989 x 10³⁰ kilograms. The mass of the earth is 5.98 x 10²⁴ kilograms. How many times bigger is the sun than the earth?

• Add

• Subtract

• Multiply

• Divide

The US spends an average of 1.02x10⁴ dollars on each student per year. There are about 7.6x10⁷ students in the US. About how much money total is spent on students per year?

• Add

• Subtract

• Multiply

• Divide

Divide:
(6.9 x 10⁷) / (2.3 x 10^-3)

• 3 x 10¹⁰

• 3 x 10⁴

• 3 x 10^-4

• 3 x 10^-11

Multiply:
(9.4 x 10⁶)(3.2 x 10⁵)

• 30.08 x 10¹¹

• 3.8 x 10¹

• 3.008 x 10¹²

• 2.9375 x 10¹