Answer:
21
Step-by-step explanation:
First, we would find 30% of 30, which would be 9. Then we would subtract 9 from 30 because we are decreasing it by 30%. That means the answer is 30-9, which is 21.
Answer:
150$ / 7 exact answer is 21.4285714 but estimate is about 21
Step-by-step explanation:
to find percentage you need to divide the whole or total amount by the percent you want to find
Hello!
In this problem, we will need to know our properties of exponents.
When we multiply two exponents, for example 10^3 × 10^-1, we will need to add the powers together. So, 10^3 × 10^-1 = 10^2 or 100.
With this, we can multiply the two constants together, and the exponents together to find our quotient.
(8.2 × 10^-6) × (9.4 × 10^-3) (rearrange the expression)
8.2 × 9.4 × 10^-6 × 10^-3 (multiply)
77.08 × 10^-9
If you wanted your answer to be in scientific notation, move the decimal place in 77.08 one place to the left, leaving you with 7.708 × 10^-8.
Therefore, your final answer is 7.708 × 10^-8.
