A human red blood cell is about 0.000008 meters in diameter which of the following represents this number in scientific notation
-6
A. 0.8 x10
-6
B . 8.0 x 10
6
C. 0.8 x 10
6
D. 8.0 x 10
MR loya stayed that the circumference of earth at the equator is 24,902.4 miles which expression represents this number in scientific notation
4
A . 2.49024 x 10
4
B. 24,9024 X. 10
4
C. 249,024 X 10
5
D. 2.49024 x 10
You need to shift the decimal point until the leading number (x) is 1 <= x < 10
Shift left: lower the power of 10
Shift right: raise the power of 10
0.000008
0.00008 * 10^-1
0.0008 * 10^-2
...
8.0 * 10^-6
24,902.4
24,90.24 * 10^1
...
2.49024 * 10^4
Oh ok thank you Steve
sorry - I got the shift exactly backwards!
But I guess you figured that out...
yeah its ok lol i got it
idk
To express a number in scientific notation, you need to represent it as a decimal number between 1 and 10 multiplied by a power of 10.
For the first question, the diameter of a human red blood cell is given as 0.000008 meters. To convert this number into scientific notation, you need to move the decimal point 6 places to the right to make it a number between 1 and 10.
Therefore, the scientific notation representation for 0.000008 meters is:
A. 0.8 x 10^-6
For the second question, the circumference of the Earth at the equator is given as 24,902.4 miles. Similar to the previous example, you need to move the decimal point 4 places to the right to make it a number between 1 and 10 in scientific notation.
Therefore, the scientific notation representation for 24,902.4 miles is:
A. 2.49024 x 10^4