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Vaselesa [24]
2 years ago
13

The expression to represent the cost for Plan A is $40 + $0.80X

Mathematics
1 answer:
IrinaVladis [17]2 years ago
6 0
Hi how are you I’m good math is hard
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Solve -1/2 I6-3X l= -6
kap26 [50]

Answer:

x = 1295/18

Step-by-step explanation:

5 0
2 years ago
In a survey of 1005 adult Americans, 46.6% indicated that they were somewhat interested or very interested in having web access
sweet-ann [11.9K]

Answer:

No, the marketing manager was not correct in his claim.

Step-by-step explanation:

We are given that in a survey of 1005 adult Americans, 46.6% indicated that they were somewhat interested or very interested in having web access in their cars.

Suppose that the marketing manager of a car manufacturer claims that the 46.6% is based only on a sample and that 46.6% is close to half, so there is no reason to believe that the proportion of all adult Americans who want car web access is less than 0.50.

<em>Let p = population proportion of all adult Americans who want car web access</em>

SO, Null Hypothesis, H_0 : p \geq 50%   {means that the proportion of all adult Americans who want car web access is more than or equal to 0.50}

Alternate Hypothesis, H_a : p < 50%  {means that the proportion of all adult Americans who want car web access is less than 0.50}

The test statistics that will be used here is<u> One-sample z proportion statistics</u>;

                T.S.  =  \frac{\hat p -p}{\sqrt{\frac{\hat p(1-\hat p)}{n} } }  ~ N(0,1)

where,  \hat p = sample proportion of Americans who indicated that they were somewhat interested or very interested in having web access in their cars =  46.6%

            n = sample of Americans = 1005

So, <u><em>test statistics</em></u>  =  \frac{0.466-0.50}{\sqrt{\frac{0.466(1-0.466)}{1005} } }

                               =  -2.161

<em>Since in the question we are not given the level of significance so we assume it to be 5%. Now at 5% significance level, the z table gives critical value of -1.6449 for left-tailed test. Since our test statistics is less than the critical value of z so we sufficient evidence to reject our null hypothesis as it will fall in the rejection region.</em>

Therefore, we conclude that the proportion of all adult Americans who want car web access is less than 0.50 which means the marketing manager was not correct in his claim.

3 0
3 years ago
Plz help me thank you
svet-max [94.6K]

Answer:

the third option is the answer

Step-by-step explanation:

( {7}^{ \frac{1}{3} } ) {}^{3}

i) to raise a power to another power, multiply the exponents

{7}^{ \frac{1}{3}  \times 3}

{7}^{1}

ii) any power raised to the power of 1 equals itself

7 {}^{1}  = 7

7 0
2 years ago
(-8,5), m = -2/5 I'm using that as a fraction write an equation in point-slope form
amid [387]
5-5
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-2-8

this is the slope for Y2-Y1
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X2-X1
7 0
3 years ago
For khan academy . Need answer immediately
kolbaska11 [484]

It's easy just use y=mx+b form ok?

8 0
3 years ago
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