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Simplify the expression. Write the answer using scientific notation. (7 × 105)2 a. 4.9 × 1010 b. 4.9 × 1011 c. 4.9 × 109 d. 49 × 1010

User Quaneesha
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2 Answers

7 votes

Answer:

4.9 × 1011

Explanation:

I did it in grandpoint

User Bleadof
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Answer:

b. 4.9 × 1011

Explanation:

Using scientific notation is similar to expressing in standard form. Given that (7 × 105)2

We open the parenthesis. This may first be expressed as

7² × 10⁽⁵⁾²

Then expand,

= 49 × 10¹⁰

To put in scientific notation, 49 = 4.9 × 10

Hence the expression becomes

= 4.9 × 10 × 10¹⁰

Using the laws of indices

= 4.9 × 10¹¹ in scientific notation

User Driouxg
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