Price after 1st year = 10000 * 80/100
= 10000 * 0.8
Price after nth year = 10000 * 0.8^n
10000 * 0.8^n = 6400
0.8^n = 0.64
0.8^n = 0.8^2
so n = 2
After 2 years, the price of motorcycle will be $6400
............................................9
Answer:
55 people is the minimum sample size
Step-by-step explanation:
The formula for minimum sample size is for µ is: n = [(z*σ)/E]²
We are given z = 1.95996, σ = 15 and E = 4
E is 4 because they said they want the interval no wider than 8, so that means 4 lower and 4 higher than the mean, so E is 4
Calculate: n = [(1.95996*15)/4]² = 54.02, we always round up when talking about people. Since 54.02 is the score, we need more than 54 people, since we can't have parts of a person, we need to round up to 55
Answer: About 10 weeks
Step-by-step explanation:
Step 1- 6.25 + 3.25 = 9.50
Step 2- 84 - 9.50 = 74.50
Step 3- 74.50 divide by 7
Step 4- Answer 10. 64285 and so on
The most exact answer is 42 + sq root 164
but the answer rounded to the nearest thousandth is 54.806
