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Vadim26 [7]
3 years ago
11

Evaluate 12a+0.35b When a = -0.25 and b = 10​

Mathematics
1 answer:
Alenkinab [10]3 years ago
3 0

Answer: 0.5

Step-by-step explanation:

You can substitute:

12(-0.25) + 0.35(10)=

-3 + 3.5=

0.5

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Unlike most packaged food products, alcohol beverage container labels are not required to show calorie or nutrient content. An a
zhenek [66]

Answer:

We conclude that the true average estimated calorie content in the population sampled exceeds the actual content.

Step-by-step explanation:

We are given that an article reported on a pilot study in which each of 58 individuals in a sample was asked to estimate the calorie content of a 12 oz can of beer known to contain 153 calories.

The resulting sample mean estimated calorie level was 193 and the sample standard deviation was 88.

Let \mu = <u><em>true average estimated calorie content in the population sampled.</em></u>

So, Null Hypothesis, H_0 : \mu \leq 153 calories     {means that the true average estimated calorie content in the population sampled does not exceeds the actual content}

Alternate Hypothesis, H_A : \mu > 153 calories     {means that the true average estimated calorie content in the population sampled exceeds the actual content}

The test statistics that would be used here <u>One-sample t test statistics</u> as we don't know about the population standard deviation;

                             T.S. =  \frac{\bar X-\mu}{\frac{s}{\sqrt{n} } }  ~ t_n_-_1

where, \bar X = sample mean estimated calorie level = 193 calories

            s = sample standard deviation = 88

            n = sample of individuals = 58

So, <u><em>the test statistics</em></u>  =  \frac{193-153}{\frac{88}{\sqrt{58} } }  ~ t_5_7

                                       =  3.462

The value of t test statistics is 3.462.

Since, in the question we are not given the level of significance so we assume it to be 5%. <u>Now, at 0.05 significance level the t table gives critical value of 1.6725 at 57 degree of freedom for right-tailed test.</u>

Since our test statistic is more than the critical value of t as 3.462 > 1.6725, so we have sufficient evidence to reject our null hypothesis as it will fall in the rejection region due to which <u>we reject our null hypothesis</u>.

Therefore, we conclude that the true average estimated calorie content in the population sampled exceeds the actual content.

8 0
3 years ago
You wish to make a snack mixes from peanuts and almonds to sell in your health-food store. Mix A is half peanuts and half almond
vivado [14]

Answer:

25 pounds of mix A

10 pounds of mix B

Step-by-step explanation:

Each pound of mix A takes half a pound of peanuts and each pound of mix B takes one fourth of a pound of peanuts. Total peanuts consumption is:

0.5A+0.25B=15

Each pound of mix A takes half a pound of almonds and each pound of mix B takes three fourths of a pound of almonds. Total almonds consumption is:

0.5A+0.75B=20

Solving the linear system:

0.5A+0.25B=15\\0.5A+0.75B=20\\0.5B=5\\B=10\ pounds\\0.5A=15-0.25*10\\A=25\ pounds

In order to exactly use all of your ingredients, you should make 25 pounds of mix A and 10 pounds of mix B

3 0
3 years ago
A savings account earns 5% simple interest per year. The principal is $1200. What is the balance after 4 years?
nlexa [21]

Answer:

The answer is 1400

Step-by-step explanation:

0.05*1200*4=240

240+1200=1440

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2 years ago
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Answer:

1. Divide

2. multiply

3. parenthesis

4. parenthesis

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Step-by-step explanation:

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Write each percent as a decimal and as a mixed number or fraction in simplest form
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Answer:

Step-by-step explanation:

8 0
3 years ago
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