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NARA [144]
3 years ago
9

Garrick's science class recycles old batteries at the TRECA recycling center. The center pays a fixed amount for each ounce of m

aterial. Write a formula to help Garrick determine what their group will receive for their work. Let: t = total they'll receive. n = ounces of material. a = amount the center pays per ounce.
Mathematics
2 answers:
Mars2501 [29]3 years ago
8 0
T = na

because, total equals to ounces of the material times the amount payed.
geniusboy [140]3 years ago
5 0
T = na

because, total equals to ounces of the material times the amount payed.
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Step-by-step explanation:

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3 years ago
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Maslowich

Answer:

(\frac{88}{100})^{75} + \binom{75}{1} (\frac{88}{100})^{74}(\frac{12}{100}) + \binom{75}{2} (\frac{88}{100})^{73}(\frac{12}{100})^{2}

Step-by-step explanation:

If a watch has fewer than three defects, then either 1.) It has no defects, 2.) it has exactly 1 defect, or 3.) it has exactly 2 defects.

1.) The probability that the watch has no defects is (\frac{88}{100})^{75}, because for every chime there is a probability of \frac{88}{100} that there is no defect

2.) The probability that the watch has exactly 1 defect is (\frac{88}{100})^{74}(\frac{12}{100}) times the number of ways you can choose 1 of 75 of the chimes to be defective, which is \binom{75}{1}, so the probability that the watch has exactly 1 defect is \binom{75}{1} (\frac{88}{100})^{74}(\frac{12}{100}).

3.) For the same reason as 2.), the probability that the watch has exactly two defects is \binom{75}{2} (\frac{88}{100})^{73}(\frac{12}{100})^{2}

Since 1.), 2.), and 3.) are mutually exclusive events, the probability of their union is simply the probability of each of them added together, which is (\frac{88}{100})^{75} + \binom{75}{1} (\frac{88}{100})^{74}(\frac{12}{100}) + \binom{75}{2} (\frac{88}{100})^{73}(\frac{12}{100})^{2}

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snow_tiger [21]

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