Question

Choose the two numbers that are written in scientific notation.

A. 16.2 x 10^14
B. 5 x 10^-8
C. 7.9 x 10¹⁰
D. 67.8 x 10^-15
E. 0.3 × 10^5

Answer 1

B and C are in scientific notation

Explanation:

The format for scientific notation has a number in front that has ONE digit to the left of the decimal that is 1-9, and then times ten to some power.

B and C both have one digit to the left of the decimal (it doesn't matter how many decimals to the right of the decimal) this is the answer.

A and D have two digits to the left of the decimal so they are both wrong. E is incorrect also because the 0 on the 0.3 means it is wrong also.

Answer 2

Answer:B and C

Explanation:

E is not correct because it is supposed to be 3x10^4, A and D are also incorrect because A is supposed to be 1.62x10^15 and D is supposed to be 6.78x10^-14