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guapka [62]
3 years ago
9

Suppose that a certain brand of light bulb has a mean life of 450 hours and a standard deviation of 73 hours. Assuming the data

are bell-shaped: (Show work to get full credit)
a. Would it be unusual for a light bulb to have a life span of 320 hours? 615 hours? Justify each response.
b. According to the Empirical Rule, 99.7% of the light bulbs have a lifetime between what two values?
c. Determine the percentage of light bulbs that will have a life between 304 and 596 hours.
Mathematics
1 answer:
Mrac [35]3 years ago
4 0

Answer:

yes it is correct

Step-by-step explanation:

plz give brainliest.

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Cody has $700 in a savings account that pays 4% simple interest. how much will he have in one year
Vlada [557]

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3 years ago
Pamela bought an electric drill at 80% of the regular price. She paid 32 for the drill. What was the regular price?
nirvana33 [79]

Answer: $40

Step-by-step explanation:

To find the whole number you divide the part by the percentage

so here it was 32/0.8

hope it helps

3 0
3 years ago
Hey whats<br><img src="https://tex.z-dn.net/?f=%20%5Csqrt%5B3%5D%7B8%20%5Ctimes%201000%7D%20" id="TexFormula1" title=" \sqrt[3]{
kolezko [41]

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\huge{\textbf{\textsf{{\color{skyblue}{An}}{\blue{sw}}{\red{er}}{\color{red}{:}}}}}

\sqrt[3]{8 \times 1000}  \\  = 2 \times 10 \\ 20

7 0
3 years ago
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seropon [69]

23 is less than 25 which means it's closer to 20, so you would round it down to 20. 1.75 is over 0.50, 1/2, so you would round it up to 2. If you multiply 2 and 20 you would get 40.

Number two gets the same explanation just with different numbers.

3 0
3 years ago
The circle shown below has AB and BC as its tangents: AB and BC are two tangents to a circle which intersect outside the circle
Nadusha1986 [10]
We are given with
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3 years ago
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