What is 0.135 written in scientific notation to two significant figures? select one: a. 1.3 x 10-7 b. 1.3 x 108 c. 1.4 x 10-8 d. 1.4 x 10-7

The answer to your question is: C. 1.4 x 10⁻⁸

Step-by-step explanation:

Change  0.0000000135 to scientific notation

Just move the decimal point 8 points to the right an express the number like

x 10

                1.35 x 10⁸  but we only need two significant figures so 1.4 x 10⁻⁸

A. 1.3 x 10⁻⁷  This option is not correct, we have to move the decimal point one more place to the right

B. 1.3 x 10⁸  This option is not correct because the power must be negative

C. 1.4 x 10⁻⁸ This is the right answer

D. 1.4 x 10⁻⁷      1.4 is correct but the power must be negative

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2