If c(x) = 4x – 2 and d(x) = x^2 + 5x, what is (c * d) (x)?
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Given:
The parking space shown at the right has an area of 209 ft².
A custom truck has rectangular dimensions of 13.5 ft by 8.5 ft.
To find:
Whether the truck fit in the parking space or not?
Solution:
If the area of the truck is more than the area of the parking space, then the truck cannot fit in the parking space otherwise it will fit in the parking space.
The area of a rectangle is:
Area of the rectangular truck is:
The area of the truck is 114.75 ft² which is less than the area of the parking space, 209 ft².
Therefore, the truck can fit in the parking space because the area of the truck is less than the area of the parking space.
Answer:
See below for answers and explanations
Step-by-step explanation:
<u>Part A</u>
Assuming that conditions have been met for the interval, we use the formula where
represents the sample mean,
represents the critical value,
represents the sample standard deviation, and
is the sample size.
The critical value of for an 80% confidence level with degrees of freedom
is equivalent to
Thus, we can compute the confidence interval:
Therefore, we are 80% confident that the true mean age of all customers is between 30.17 and 35.11 years.
<u>Part B</u>
The margin of error is