A certain insect is approximately 4×10^−2 inches long. A second insect is about 1.3×10^−1 inches long. What is the total length of the two insects in inches? Use scientific notation to express your answer to 1 decimal place.(1 point)

Answer 1

To find the total length of the two insects, we add their lengths.

4×10^−2 + 1.3×10^−1 = 0.04 + 0.13 = 0.17

The total length of the two insects is 0.17 inches, which can be expressed in scientific notation as 1.7×10^−1 inches.

Answer 2

6.3 x 10^3 + 2.41 x 10^4, use scientific notation to express your answer

Answer 3

To find the sum of these two numbers in scientific notation, we add the coefficients and keep the same exponent.

6.3 x 10^3 + 2.41 x 10^4 = 6.3 + 24.1 = 30.4

Therefore, the sum of these two numbers is 30.4 x 10^3 or, in scientific notation, 3.04 x 10^4.

Answer 4

You sure?

Answer 5

Apologies for the mistake. Let's correct it.

To find the sum of these two numbers in scientific notation, we need to rewrite them with the same exponent.

6.3 x 10^3 can be rewritten as 0.63 x 10^4 (since 6.3 = 0.63 x 10).

Now we can add the coefficients:

0.63 x 10^4 + 2.41 x 10^4 = 3.04 x 10^4

Therefore, the sum of these two numbers is 3.04 x 10^4.

Answer 6

An American football field has an area of 6.4 x 10° square yards. A Canadian football field is 3,350 square yards larger. What is the area of a Canadian football field? Write your answer in scientific notation to 2 decimal places. (1 point)

Answer 7

A skyscraper has a mass of 2.2×105 tons. Another skyscraper in the same town has a mass of 3.7×105 tons. What is the combined mass, in tons, of the two skyscrapers? Use scientific notation to express your answer to 1 decimal place.