calculate 6.25 x 10^6 - 4.73 x 10^6. express your answer in scientific notion to 2 decimal places
To calculate 6.25 x 10^6 - 4.73 x 10^6, we subtract the coefficients (6.25 - 4.73) and keep the same exponent (10^6):
6.25 x 10^6 - 4.73 x 10^6 = 1.52 x 10^6
Therefore, the answer is 1.52 x 10^6 to 2 decimal places.
The average distance from Earth to Mars is 2.25 x 10^8 km, and the distance from Earth to Neptune is 4.3514 × 10^9.
How much farther is Neptune from Earth than Mars? Express your answer in scientific notation. Do not round your answer.
(1 point)
To find out how much farther Neptune is from Earth than Mars, we need to subtract the distance from Earth to Mars from the distance from Earth to Neptune.
4.3514 × 10^9 km - 2.25 x 10^8 km = 4.3514 × 10^9 km - 0.225 × 10^9 km
Simplifying the expression:
4.3514 × 10^9 km - 0.225 × 10^9 km = (4.3514 - 0.225) × 10^9 km
Calculating the subtraction:
4.3514 - 0.225 = 4.1264
Expressing the answer in scientific notation:
4.1264 × 10^9 km
Therefore, Neptune is 4.1264 × 10^9 km farther from Earth than Mars.
Human hair grows at a rate of about 6.849 × 10^-4 cm per hour to 2.329 x 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. (1 point)
To find the difference between the high end and the low end of the range, we subtract the low end from the high end.
2.329 x 10^-2 cm per hour - 6.849 × 10^-4 cm per hour
Simplifying the expression:
2.329 x 10^-2 cm per hour - 0.06849 × 10^-2 cm per hour
Calculating the subtraction:
2.329 - 0.06849 = 2.26051
Expressing the answer in scientific notation:
2.26051 × 10^-2 cm per hour
Therefore, the difference between the high end and the low end of the range is 2.26051 × 10^-2 cm per hour.
Find 0.078 - (5.2 c 10^3) express your answer in scientific notion do not round your answer
To solve the expression 0.078 - (5.2 x 10^3), we first need to convert 0.078 to scientific notation:
0.078 = 7.8 x 10^-2
Then we subtract 7.8 x 10^-2 from 5.2 x 10^3:
5.2 x 10^3 - 7.8 x 10^-2
When subtracting numbers in scientific notation, we need to ensure that the exponents are the same. So we can rewrite 7.8 x 10^-2 as 7.8 x 10^1:
5.2 x 10^3 - 7.8 x 10^1
Now that the exponents are the same, we can subtract the coefficients:
5.2 x 10^3 - 7.8 x 10^1 = 5.192 x 10^3
Therefore, the answer is 5.192 x 10^3.