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Archy [21]
3 years ago
11

ethan bought a printer on sale for $59.99 and a jump drive for $6.99. the sales tax on the total was $5.36. Ethan gave the sales

person four $20 bills. how much change did Ethan receive?
Mathematics
1 answer:
liq [111]3 years ago
7 0

Answer:

7.66

Step-by-step explanation:

Add up the total cost, the prices of the items and the tax

59.99+6.99+5.36 =72.34

He gave the sales person 4*20 = 80

Subtract the cost from the  money paid

80 - 72.34 = 7.66

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Answer:

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Step-by-step explanation:

Let X denote the lifetime of light bulb. Given X \sim Exp(\lambda) where the mean is E(X) = 340 =\frac{1}{\lambda} \implies \lambda = \frac{1}{340} = 0.00294.

Recall that,

\displaystyle P(X>x) = 1 - \int_0^x e^{-\lambda x} = 1 - (1 - e^{-\lambda x} = e^{-\lambda x}

\displaystyle P(X>220 | X>100) = \frac{P(X>220,X>100)}{P(X>100)} = \frac{e^{-\lambda \times 220}}{e^{-\lambda \times 100}} = \frac{0.5236}{0.7452} = 0.7026

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3 years ago
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strojnjashka [21]

Answer:

2 + (3 + 4) = (2 + 3) + 4 ⇒2+7 = 5+4.

Step-by-step explanation:

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3 years ago
You buy a used car for $10,000. The value of the car decreases by22% each year. Approximately how much is the car worth in 3 yea
IRINA_888 [86]

Answer:

The value will be $3,400 after 3 years

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Convert the percentage into the cash decrease each year, multiply that by 3 and then subtract $10,000 by the sum.

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