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Whitepunk [10]
3 years ago
12

I need help? For precalculus

Mathematics
1 answer:
ikadub [295]3 years ago
3 0
Good luck I’m not sure what else to tell yuh
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In January of 2011, the U.S. saw an increase in gas prices. Imagine the average price per gallon was $3.12 with a standard devia
Arada [10]

Answer:

31.92%

Step-by-step explanation:

We are given;

Population mean; μ = $3.12

Sample mean; x¯ = $3.16

Sample size; n = 10

Standard deviation; σ = $0.27

Z-score formula is; z = (x¯ - μ)/(σ/√n)

z = (3.16 - 3.12)/(0.27/√10)

z = 0.04/(0.08538)

z ≈ 0.47

Now, the percent of other sample means, based on 10 gas stations, that would be greater than the one observed is;

P(x¯ > 3.12) = 1 - P(z < 0.47)

From z-table attached P(z < 0.47) = 0.68082

Thus;

P(z > 0.47) = 1 - 0.68082

P(z > 0.47) ≈ 0.3192

This expressed in percentage is 31.92%

4 0
2 years ago
6 is 10% of what number
LUCKY_DIMON [66]
I hope this helps you

7 0
3 years ago
Convert 21/40 to a percent
Naya [18.7K]
21/40 = 52.50% (52.5)
5 0
3 years ago
Read 2 more answers
Find x !!?????!!!????????????
mars1129 [50]

Answer:

x = 15

Step-by-step explanation:

Given

See attachment

Required

Find x

The figure in the attachment is a quadrilateral and the angles in a quadrilateral add up to 360.

So, we have:

90 + 6x + 5+ 10x - 40 + 4x + 5 = 360

Collect like terms

6x + 10x + 4x = 360 - 90 - 5 + 40 - 5

20x = 300

Divide both sides by 20

x = 15

Hence, the value of x is 15

4 0
2 years ago
Choose a rational function with a removable discontinuity. A f(x)=x+1x+2f\left(x\right)=\frac{x+1}{x+2}f(x)= x+2 x+1 ​ B g(x)=xx
Dvinal [7]

Answer:

ok i forgot answer but i think its 1 + 1 = 49e+02848923589 ye

Step-by-step explanation:

8 0
2 years ago
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