Answer:
Y=0.35x+18.99
Step-by-step explanation:
Y = total cost
X = number of letters
The nth number is 81 /10.
Steps:
You multiple the denominator by itself
Answer:
a. 19.68 miles per gallon.
b. 26.32 miles per gallon.
Step-by-step explanation:
Mean gas mileage (μ) = 23.0 mpg
Standard deviation (σ) = 4.9 mpg
In a normal distribution, for any length X, the z-score is determined by the following expression:

In a normal distribution, the 25th percentile (first quartile) of a normal distribution has a corresponding z-score of z = -0.677 and the 75th percentile has a corresponding z-score of z = 0.677
a. The first quartile of the distribution of gas mileage is

19.68 miles per gallon.
b. The third quartile of the distribution of gas mileage is

26.32 miles per gallon.
Answer:
Estelle paid $104 in total.
Step-by-step explanation:
15% of $80.00 is 12. So add 12 two times to 80 because of 15% sales tax and 15% tip.