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.(1 point)

Answer 1

To find the combined mass of the two skyscrapers, we add the masses of the two skyscrapers.

2.2×105 tons + 3.7×105 tons = 5.9×105 tons

Therefore, the combined mass of the two skyscrapers is 5.9×105 tons.

Answer 2

A skyscraper has a mass of 2.2×10^5 tons. Another skyscraper in the same town has a mass of 3.7×10^5 tons. What is the combined mass, in tons, of the two skyscrapers? Use scientific notation to express your answer to 1 decimal place.(1 point)

Answer 3

To find the combined mass of the two skyscrapers, we add the masses of the two skyscrapers.

2.2×10^5 tons + 3.7×10^5 tons = 5.9×10^5 tons

Therefore, the combined mass of the two skyscrapers is 5.9×10^5 tons.

Answer 4

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.

Answer 5

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

4×10^(-2) inches + 1.3×10^(-1) inches = 1.7×10^(-1) inches

Therefore, the total length of the two insects is 1.7×10^(-1) inches.

Answer 6

What is the sum of 6.3×10^3 and 2.41×10^4 ? Use scientific notation to express your answer.(1 point)

Answer 7

To find the sum of 6.3×10^3 and 2.41×10^4, we simply add the numbers. However, before we do that, we need to ensure that both numbers have the same exponent.

Since 6.3×10^3 is equivalent to 6.3×10^3 x 10^1, we can rewrite it as 6.3×10^4.

Now we can add the two numbers:

6.3×10^4 + 2.41×10^4 = 8.71×10^4

Therefore, the sum of 6.3×10^3 and 2.41×10^4 is 8.71×10^4.

Answer 8

wrong

Answer 9

I apologize for the mistake. Let's correctly calculate the sum of 6.3×10^3 and 2.41×10^4.

To add these numbers, we need to align the decimal places by adjusting the exponents of 10:

6.3×10^3 = 0.0063×10^6 (move the decimal point 3 places to the right)
2.41×10^4 = 0.241×10^6 (move the decimal point 4 places to the right)

Now we can add the numbers:

0.0063×10^6 + 0.241×10^6 = 0.2473×10^6

To express the sum in scientific notation, we need to adjust the decimal point so that there is only one non-zero digit to the left. Therefore, we can rewrite the sum as:

0.2473×10^6 = 2.473×10^5

Therefore, the correct sum of 6.3×10^3 and 2.41×10^4 is 2.473×10^5.

Answer 10

An American football field has an area of 6.4×10^3 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)
____ ×10^3 square yards

Answer 11

To find the area of the Canadian football field, we need to add 3,350 square yards to the area of the American football field.

6.4×10^3 square yards + 3,350 square yards = 9.75×10^3 square yards

Therefore, the area of the Canadian football field is 9.75×10^3 square yards.

Answer 12

A human hair has a diameter of about 4×10−3 inches. A fingernail is about 0.011 inches thicker. How thick is a fingernail? Write your answer as a decimal to 3 places.(1 point)

Answer 13

To find the thickness of a fingernail, we can add the thickness of the human hair (4×10^(-3) inches) to the additional thickness (0.011 inches).

4×10^(-3) inches + 0.011 inches = 0.015 inches

Therefore, a fingernail is approximately 0.015 inches thick.

Answer 14

add7.3*10^7+1.8*10^7

Answer 15

add 7.3*10^7+1.8*10^7 what is the correct sum

Answer 16

1. 5.9 x 10^5
2. 1.7 x 10^(-1)
3. 3.04 x 10^4
4. 9.75
5. 0.015