Question

6. Indicate whether each expression is written correctly or incorrectly. Write a C on

the line if it is correct, or write an / on the line if it is incorrect.
a. 0.23 x 10^4
b. 67 x 10^-3
c. 9.1 x 10^8
d. 0.0003 x 10^-4
e. 3.7 x 10^5

Answer 1

a. 2.3 × 10³

b. 6.7 × 10^-2

c. correct

d. 3 × 10^4

e. correct

Explanation:

For a number to be written correctly in scientific notation, the number has to be written as a number from 1 to less than 10 multiplied by a power of 10.

If the first number is less than 1 or 10 or greater, then it is not correct scientific notation.

a. 0.23 × 10^4 change to 2.3 × 10³

b. 67 × 10^-3 change to 6.7 × 10^-2

c. correct

d. 0.0003 × 10^8 change to 3 × 10^4

e. correct