Complete the following cmputations. Round your answer to the correct number of s

Question

Complete the following cmputations. Round your answer to the correct number of significant figures.

102.794 - 61.9 = ______________ # of significant figures in answer _______________

4.29 x 10-3 + 3.99 x 10-4 = ______________ # of significant figures in answer _______________

0.0019 / 0.0352 = ______________ # of significant figures in answer _______________

9 x 10-2 * 1.73 x 103 = ______________ # of significant figures in answer _______________

Complete the following cmputations. Round your answer to the correct number of significant figures. 102.794 - 61.9 = ______________ # of significant figures in answer _______________ 4.29 x 10-3 + 3.99 x 10-4 = ______________ # of significant figures in answer _______________ 0.0019 / 0.0352 = ______________ # of significant figures in answer _______________ 9 x 10-2 * 1.73 x 103 = ______________ # of significant figures in answer _______________

Explanation / Answer

1. 102.794 - 61.9 = 40.894

We need to round the answer to the same decimal place as the least-accurate number.

61.9 has one decimal point

The answer is 40.9

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4.29 x 10^-3 + 3.99 x 10^-4 = 4.689 x 10^-3

We need to round the answer to the same decimal place as the least-accurate number.

It has two digits after decimal point.

So, the answer is 4.69 x 10^-3

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0.0019 / 0.0352 = 0.053972

We need to round the answer to the same number of significant digits as the least-accurate number.

0.0019 has two sig fig.

So, the answer is 0.054

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9 x 10^-2 * 1.73 x x10^3 = 155.7

We need to round the answer to the same number of significant digits as the least-accurate number.

9 has 1 sig fig.

So, the answer is 200

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