The area of Asia is about 44,600,000 square kilometers. The area of Europe is about 9.94 x 10^6 square kilometers. What is the combined area of Asia and Europe?

a. 1.44 x 10^6 square kilometers

b. 5.454 x 10^6 square kilometers

c. 1.44 x 10^7 square kilometers

d. 5.454 x 10^7 square kilometers

Combined area is 5.454 × 10^7 km²

Step-by-step explanation:

Area of Asia = 44,600,000 km²

Area of Europe = 9,943,106 km²

⇒ Combined Area = 44,600,000 + 9,943,106

                               = 54,543,106 km²

54,543,106 = 5.454 × 10^7 km² (Dividing and multiplying by 10^7)

  d.  5.454 x 10^7 square kilometers

Step-by-step explanation:

Adding 4.46×10^7 to 0.994×10^7 we get 5.454×10^7.

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Before you can add numbers in scientific notation, they must both have the same multiplier. Here, we can see that the area of Asia will be written with an exponent of 7, so we choose to write both numbers that way.

  44,600,000 = 4.4×10,000,000 = 4.4×10^7

  9.94×10^6 = (0.994×10)×10^6 = 0.994×10^7

The sum is (4.400 +0.994)×10^7 = 5.454×10^7.

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