I thought a picture would be better but here you go .
Answer:
Step-by-step explanation:
100 + 20 = 120
- A. 5(20 + 3) = 115 ≠ 120
- B. 10(10 + 10) = 200 ≠ 120
- C. 5(95 + 4) = 495 ≠ 120
- D. 5(20 + 4) = 120, correct
Substitute the values given
(2+1)^-9
(3)^-9
When the exponent is negative, because of the negative exponent rule, this value goes into the denominator, as 1/((3)^9). This would be quite small to write as a decimal, so in scientific notation it is written as 5.08e-5 or 1/19,683 as a fraction.