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2 years ago

15

To get your car repaired at a certain dealership in Woodstock, the rate charged is $90 per hour worked on your car, plus a $50 d

iagnostic fee.
1) Create an equation to find the (C)harge to fix the car:

2) If your car was worked on for 4.6 hours what would be the total charge?

3) If the total cost was $800, how many hours was the car in the shop?

1 answer:

kakasveta [241]2 years ago

4 0

C- charge
H- hours
D- diagnostic fee

C= #H(90)+ D

C= 4.6(90)+50
=414+50
=$464

C-$800
H-?
D-50

C= #H(90)+50

800=H(90)+50

H(90)=800-50

H(90)=750

H(90)/90=750/90

H=750/90

H= 8.33333333

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Step-by-step explanation:

Information given:

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The confidence interval would be given by this formula

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And replacing into the confidence interval formula we got:

$0.81 - 2.326 \sqrt{\frac{0.81(1-0.81)}{131}}=0.730$

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And the confidence interval would be:

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