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zaharov [31]
3 years ago
14

Quentin buys a model car every year. The first time he bought a model car, in Year 0, it cost $19.40. He notices the price is ge

tting more expensive, at a rate of 1.5% per year.
Quentin sketches a graph of the situation.

Which statement is true?

A.The point (4, 20.29) is on the graph.

B.The graph increases from left to right.

C.The point (2, 19.69) is on the graph.

D.The graph decreases from left to right.
Mathematics
1 answer:
vitfil [10]3 years ago
6 0

Answer: the graph increases from left to right, since the price goes up. If you were to actually graph this, the years would be on the bottom and the price would be on the left side, so since the price is going up, so is the graph. :)


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Hi <span>Spor7tdardLamilokab, this particular equation is a binomial probability equation:

P(X) = </span>( \frac{n}{k}) * p^{k} *(1 - p)^{n-k}

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Where (\frac{n}{k}) equals  \frac{n!}{k!(n-k)!} , where n! is n * (n-1) * (n-2) 8 ... 1

So for your particular equation:

P(x \geq 3) =  (\frac{5}{3}) * 0.52^{3} * (1 - .52)^{5-3}

You would repeat the above equation for 4 as well and add that to the computation for 3, since you want the probability that you'll get 3 or more heads.

Solving this produces the answer:

P(x\geq 3) = 0.34308352

You can also solve this with a TI 83 or 84.

To do this, the steps are 2ND | VARS (or DISTR) | BINOMPDF| TRIALS | PROBABILITY | X VALUE

Doing this for 3 and 4 produces the same result:

binompdf(4, 0.52, 3) + binompdf(4, 0.52, 4) = 0.34308352


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