Answer: 59.91%.
Step-by-step explanation:
- We know that the fraction of the variability in data values accounted by a model is given by
, where r is the coefficient of correlation.
We are given , that the correlation between a car’s engine size and its fuel economy (in mpg) is r = - 0.774.
Then, the fraction of the variability in fuel economy is accounted for by the engine size would be 
[Multiply 100 to convert a decimal into percent]
Hence, the fraction of the variability in fuel economy is accounted for by the engine size is 59.91%.
None of the options are correct.
Answer:
1. f(x) is the total cost
2. x is the hours spent on the internet
3. the base rate is 3.50
4. hourly charge is .75
5. 4.63
Step-by-step explanation:
1. f(x) is the total cost or the amount of money he has to pay
2. x is the hours spent on the internet, it is the time spent on the internet
3. the base rate is 3.50, or the minimum amount just to get connected
4. hourly charge is .75
5. Let x = 1.5 for the hour and a half
f(1.5) = .75(1.5) + 3.5
1.125+3.5
4.625
To the nearest cent
4.63
Answer: $10
Step-by-step explanation:
Let's analize the information given: We know that she had $94 to spend on 8 books and after buying these books she had $14. So, we need to calculate the amount of money she spent. Subtract $94 and $14:
Then, to calculate the cost of each book, we need to divide the "Total spent" by 8:
Answer:
C
Step-by-step explanation:
I think that would be c not completely sure but I hope it helps
