A trolley company charges a fixed amount plus a fee based on the distance traveled. The cost chart for the company is shown:
2 answers:
Answer: $6
Step-by-step explanation:
Given: A trolley company charges a fixed amount plus a fee based on the distance traveled.
If y represents cost (dollars) charged by the company for x distance traveled (miles) .
then represents the total cost where c is the fixed charge and m is the fee for the distance traveled.
From, table we can see when x=0, y=6.
Hence, the fixed fee charged by the company is $6.
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Answer:
There is a 50% probability that its total life will exceed 20,000 miles.
Step-by-step explanation:
To solve this question, we use the following formula:
In which P(A|B) is the probability of A happening, given that B has happened, is the probability of A and B happening, and P(B) is the probability of B happening.
In this problem, we want:
The probability of the total life of the car battery exceeding 20,000 miles, given that it exceeded 10,000 miles.
is the probability of exceeding 20,000 and 10,000 miles. It is the same as the probability of exceeding 20,000 miles(If it exceeded 20,000 miles, necessarily it will have exceeded 10,000 miles). So
P(B) is the probability of exceeding 10,000 miles. So
So
There is a 50% probability that its total life will exceed 20,000 miles.