Question

A national park covers an area of 1.42×106 acres. A nearby national forest covers an area of 1.2×106 acres. What is the total number of acres in the park and the forest combined?(1 point)
Responses

2.62×106
2.62 times 10 superscript 6 baseline

2.62×1012
2.62 times 10 superscript 12 baseline

15.5×106
15.5 times 10 superscript 6 baseline

1.54×106
1.54 times 10 superscript 6 baseline

Answer 1

The distance from Venus to the sun is about 67,000,000 miles. The distance from Earth to the sun is about 2.6×107 farther. What is the distance from Earth to the sun? Write your answer in scientific notation to 1 decimal place.(1 point)

Answer 2

Calculate 4.8×10−3−9.4×10−6 . Express the answer in scientific notation rounding to 2 decimal places.(1 point)

Answer 3

A strand of hair has an average mass of 2.17×10−5 ounces. A grain of rice has an average mass of 0.002 ounces. How much heavier is a grain of rice than a strand of hair? Express your answer in scientific notation.(1 point)

Answer 4

Light travels at an approximate rate of 1.9×105 mi./sec. There are about 3.2×107 seconds in a year. About how many miles does light travel in a year? Write the answer in scientific notation. Express the answer to the exact decimal place.(1 point)

Answer 5

The total number of acres in the park and the forest combined is 2.62×10^6 acres.

Answer 6

The distance from Earth to the sun is about 3.27×10^7 miles.

Answer 7

To calculate 4.8×10^(-3) - 9.4×10^(-6), we need to make sure both numbers have the same exponent.

First, we can rewrite 9.4×10^(-6) as 0.0094×10^(-3), so it has the same exponent as 4.8×10^(-3).

Then, we can subtract:
4.8×10^(-3) - 0.0094×10^(-3) = (4.8 - 0.0094)×10^(-3) = 4.7906×10^(-3).

Rounding to 2 decimal places, the answer is approximately 4.79×10^(-3).

Answer 8

To find the difference in mass between a grain of rice and a strand of hair, we subtract the mass of the hair from the mass of the rice.

0.002 ounces - 2.17×10^(-5) ounces = (0.002 - 0.0000217) ounces = 0.0019783 ounces.

To express the answer in scientific notation, we can write 0.0019783 ounces as 1.9783×10^(-3) ounces.

Therefore, a grain of rice is 1.9783×10^(-3) ounces heavier than a strand of hair.

Answer 9

To find out how many miles light travels in a year, we need to calculate the product of the speed of light and the number of seconds in a year.

Speed of light: 1.9×10^5 mi./sec
Number of seconds in a year: 3.2×10^7 seconds

Product: (1.9×10^5 mi./sec) × (3.2×10^7 seconds)

To multiply these numbers in scientific notation, we can multiply the coefficients and add the exponents:

(1.9 × 3.2) × (10^5 × 10^7) = 6.08 × 10^(5+7) = 6.08 × 10^12

Therefore, light travels approximately 6.08×10^12 miles in a year.