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2 years ago

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1. If ground beef is composed of 85% lean meat and 15% fat, how many pounds of fat are ground along with lean beef to yield 15 p

ounds of ground beef? ( show as a mixed fraction).
2. If 40% of the pieces of cheese on a cheese platter are cheddar and there are 50 pieces of cheddar cheese on the platter, how many total pieces of cheese are on the platter ??

1 answer:

Aleonysh [2.5K]2 years ago

3 0

Answer:

1. 2 $\frac{1}{4}$ pounds of fat

2. 125 total pieces of cheese

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Answer:

We accept the alternate hypothesis. We conclude that the mean lifetime of tires is is less than 33,000 miles.

Step-by-step explanation:

We are given the following in the question:

Population mean, μ = 33,000 miles

Sample mean, $\bar{x}$ = 32, 450 miles

Sample size, n = 18

Alpha, α = 0.05

Sample standard deviation, s = 1200 miles

a) First, we design the null and the alternate hypothesis

$H_{0}: \mu = 33000\text{ miles}\\H_A: \mu < 33000\text{ miles}$

b) Level of significance:

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c) We use One-tailed t test to perform this hypothesis.

d) Formula:

$t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }$ Putting all the values, we have

$t_{stat} = \displaystyle\frac{32450 - 33000}{\frac{1200}{\sqrt{18}} } = -1.9445$

Now, $t_{critical} \text{ at 0.05 level of significance, 17 degree of freedom } = -1.7396$

Rejection area:

$t < -1.7396$

Since,

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e) We fail to accept the null hypothesis and reject it as the calculated value of t lies in the rejection area.

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3 years ago

What is the answer? 6^2(2/5 +5)-3

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$\text{PEMDAS simply means}\downarrow$

$\bullet\ \large\text{\bf{Parentheses}}$ $\large\checkmark$

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2 years ago

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3 years ago

The front of a house is composed of a trapezoid and a rectangle. The height of the rectangle is 12 feet. The base of therectangl

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Drawing of the description:

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Finally, to get the total area we add them:

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