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Xelga [282]
3 years ago
8

You are buying batteries, a stereo, and some CDs from the I.B. Electronics store. You can buy from this store online or in a phy

sical store. You have a coupon for 10% off that can only be used in the physical store and a $5.00 off coupon that can only be used online. The sales tax of 5% only applies to the physical store. Shipping for the online store is a flat rate of $6.99. You are trying to decide whether to shop at the physical store or the online store. Using the pricing information below, how much would you pay at the online store after all discounts, taxes, and shipping fees have been applied? Item Quantity Physical Store Online Store Batteries 2 packs $5.99/pack $4.99/pack Stereo 1 system $100.00/system $90.00/system CDs 3 CDs $7.95/CD $8.95/CD $128.82 $138.04 $128.36 $118.42

Mathematics
2 answers:
Rashid [163]3 years ago
7 0

Answer:

ONLINE STORE WILL SAVE YOU THE MOST

Step-by-step explanation:

melomori [17]3 years ago
5 0

Answer:

The online store will save you the most

Step-by-step explanation:

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Select the correct answer.
tigry1 [53]

Answer:

We can be 95% certain that the sample mean will fall within $44.87 and $46.93

Step-by-step explanation:

Empirical Rule:

68% of the measures are within 1 standard deviation of the mean.

95% of the measures are within 2 standard deviation of the mean.

99.7% of the measures are within 3 standard deviations of the mean.

Central Limit Theorem:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean \mu and standard deviation \sigma, the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean \mu and standard deviation s = \frac{\sigma}{\sqrt{n}}.

For a skewed variable, the Central Limit Theorem can also be applied, as long as n is at least 30.

Population:

Mean $45.90, standard deviation $10.31.

Sample:

By the Central limit theorem, mean $45.90, standard deviation s = \frac{10.31}{\sqrt{400}} = \frac{10.31}{20} = 0.5155

Which interval can the branch manager be 95% certain that the sample mean will fall within?

By the Empirical Rule, within 2 standard deviations of the mean. So

45.90 - 2*0.5155 = $44.87

45.90 + 2*0.5155 = $46.93

We can be 95% certain that the sample mean will fall within $44.87 and $46.93

6 0
2 years ago
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Answer:

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Step-by-step explanation:

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Ahat [919]
1. k = 2<span>2.5</span><span>
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thats what i got</span>
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Answer:

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Answer:

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Step-by-step explanation:

y=-7-4= -11

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