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12345 [234]
3 years ago
5

Elizabeth has 14 boxes of cookies each box has 28 cookies how many cookies does she have

Mathematics
1 answer:
aev [14]3 years ago
3 0
We calculate this by multiplying the number of cookies by the number of boxes:

28*14=(20+8)*14=280+80+32=360+32=392 (that's how I like to count it, there are also other methods)


so she has 392 cookies in common.
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Answer:

A. P(X<20,000) = 0.0392

B. P(20,000 < x < 30,000) = 0.488

C. Amount = $39,070

Step-by-step explanation:

From XO group website

Cost of a wedding = $29,858

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Standard Deviation, σ =$5,600

a. Calculating the probability that a wedding costs less than $20,000

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From the z table,

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b. Calculating the probability that a wedding costs between $20,000 and $30,000

P(20,000 < x < 30,000)

First, the z value needs to be calculated.

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P(-1.76 < z <0.02) = 0.508 - 0.0392

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P(20,000 < x < 30,000) = 0.488

c. Using the following formula, we'll get the amount it'll a wedding to be among the 5% most expensive

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Make x the subject of formula

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Fist we need to get the z value of 5%

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x = σz + μ becomes

x = 5600 * 1.645 + 29,858

x = $39,070

Amount = $39,070

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