Calculate 6.25 × 10^6 − 4.73×10^6. Express your answer in scientific notation to 2 decimal places.
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
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.
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
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.
To calculate the given expression in scientific notation, we can follow these steps:
Step 1: Perform the subtraction.
6.25 × 10^6 − 4.73 × 10^6 = 1.52 × 10^6
Step 2: Express the result in scientific notation to 2 decimal places.
1.52 × 10^6 can be expressed as 1.52 × 10^6
So, the answer to the given expression is 1.52 × 10^6.
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