Help easy math problem!!!!!!’
2 answers:
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Answer:
The probability that a car that comes into the garage needs both an oil change and a tire rotation is .
Step-by-step explanation:
The conditional probability of an event <em>B</em> given that another event <em>A</em> has already occurred is:
Denote the events as follows:
<em>X</em> = cars brought in for service need an oil change
<em>Y</em> = cars brought in for service need a tire rotation
The information provided is:
Compute the value of P (X ∩ Y) as follows:
Thus, the probability that a car that comes into the garage needs both an oil change and a tire rotation is .
<h3><u>Question:</u></h3>
Jabari is power washing houses for a summer job. For every job, he charges an initial fee plus $30 for each hour of work. His total fee for a 4 -hour job, for instance, is $170 . Jabari's total fee,f, for a single job is a function of the number,t, of hours it takes him to complete the job. Write the function's formula.
<h3><u>Answer:</u></h3>f = 50 + 30t is the function formula for total fee of Jabari
<h3><u>Solution:</u></h3>Let the initial fee be "x"
Let "t" be the number of hours invested in that work
Let "f" be the total fee of Jabari
He charges and initial fee plus 30$ for each hour of work
Therefore, total fee is given as:
Total fee = initial fee + 30(number of hours)
Thus the function formula is found
<h3><u>Find the initial fee:</u></h3>Given that,
His total fee for a 4 -hour job, for instance, is $170
Therefore,
t = 4
f = 170
Thus we get,
<em><u>Thus the formula becomes,</u></em>
Thus the total fee is a function of number of hours it takes him to complete the job