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lord [1]
4 years ago
5

You want to buy some beans. Upper A 7​-ounce package costs ​$2.52. A 15​-ounce package costs ​$5.55. An 18​-ounce package costs

​$6.30. Which package is the best​ buy?
Mathematics
1 answer:
maxonik [38]4 years ago
8 0

Answer:

The last package having 18 ounce beans in $6.30 is best to buy.

Step-by-step explanation:

Given that:

A 7​-ounce package costs ​$2.52

for 1 ounce it will cost = $2.52/7

1 ounce will cost = $0.36

A 15​-ounce package costs ​$5.55

for 1 ounce it will cost = $5.55/15

1 ounce will cost = $0.37

An 18​-ounce package costs ​$6.30.

for 1 ounce it will cost = $6.30/18

1 ounce will cost = $0.35

So the last package having 18 ounce beans in $6.30 is best to buy.

i hope it will help you!

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A large school district in southern California asked all of its eighth-graders to measure the length of their right foot at the
Ber [7]

Answer:

The probability of the sample mean foot length less than 23 cm is 0.120

Step-by-step explanation:

* Lets explain the information in the problem

- The eighth-graders asked to measure the length of their right foot at

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∴ μ = 23.4 cm

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∴ σ = 1.7 cm

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∴ The sample mean x = 23, find the standard deviation σx

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∵ σ = 1.7 and n = 25

∴ σx = 1.7/√25 = 1.7/5 = 0.34

- Now lets find the z-score using the rule z-score = (x - μ)/σx

∵ x = 23 , μ = 23.4 , σx = 0.34

∴ z-score = (23 - 23.4)/0.34 = -1.17647 ≅ -1.18

- Use the table of the normal distribution to find P(x < 23)

- We will search in the raw of -1.1 and look to the column of 0.08

∴ P(X < 23) = 0.119 ≅ 0.120

* The probability of the sample mean foot length less than 23 cm is 0.120

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Problem 3

<h3>Camille is correct</h3>

You subtract 4x from both sides, then divide both sides by -2 to fully isolate y.

===============================================

Problem 4

Multiply both sides by r to get

2mr = p-q

which is the same as

p-q = 2mr

The last step is to add q to both sides leading to this final answer

<h3>p = 2mr+q</h3>

================================================

Problem 5

Answer: r = \sqrt[3]{\frac{3V}{4\pi}}

This is the cube root of (3V)/(4pi)

----------------

Work Shown:

V = \frac{4}{3}\pi r^3\\\\3V = 4\pi r^3\\\\4\pi r^3 = 3V\\\\r^3 = \frac{3V}{4\pi}\\\\r = \sqrt[3]{\frac{3V}{4\pi}}\\\\

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12y+11 is the correct expression.

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