Question

Calculate 6.25 × 10^6 − 4.73×10^6. Express your answer in scientific notation to 2 decimal places.

Answer 1

The average distance from Earth to Mars is 2.25 × 10^8 km, and the distance from Earth to Neptune is 4.3514 × 10^9 km. How much farther is Neptune from Earth than Mars? Express your answer in scientific notation. Do not round your answer.

Answer 2

Human hair grows at a rate of about 6.849 × 10^−4 cm per hour to 2.329 × 10^−2 cm per hour. The rate depends on gender, genetics, age, and health. Find the difference between the high end and the low end of the range. Express your answer in scientific notation. Do not round your answer.

Answer 3

is it correct

Answer 4

To perform this calculation, we need to subtract the numbers and then express the result in scientific notation.

6.25 × 10^6 - 4.73 × 10^6 = 1.52 × 10^6

Answer 5

To calculate the difference in distance between Neptune and Mars, we need to subtract the two distances.

4.3514 × 10^9 km - 2.25 × 10^8 km = 4.3514 × 10^9 km - 0.225 × 10^9 km

= 4.1264 × 10^9 km

Answer 6

To find the difference between the high end and the low end of the range, we need to subtract the two values:

2.329 × 10^−2 cm/hour - 6.849 × 10^−4 cm/hour

We need to subtract the decimal part and the exponent part separately:

0.02329 - 0.0006849 = 0.0226051

Now, let's subtract the exponent part:

10^−2 - 10^−4 = 10^(-2 - (-4)) = 10^(-2 + 4) = 10^2 = 100

Putting it all together, we have:

0.0226051 × 100 = 2.26051

Expressing this in scientific notation, we have:

2.26051 × 10^0