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3 years ago

Car insurance of 800 Is twice what it was a decade ago. Find the cost of the insurance then

Mathematics

1 answer:

mr Goodwill [35]3 years ago

6 0

Answer:

it was 400 back then, a decade ago

Step-by-step explanation:

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The regular price of The Mario Kart 8 Deluxe video game is $59.99. On Amazon, the discount is $10.05. What is the percent discou

DanielleElmas [232]

Answer:

It was a 16.7% discount

Step-by-step explanation:

You have to get the discount and divide it by the original price and it would be 0.16753 and so the percent becomes 16.7%

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2 years ago

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Amanda [17]

Answer:

yes

Step-by-step explanation:

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1 year ago

Give a 98% confidence interval for one population mean, given asample of 28 data points with sample mean 30.0 and sample standar

klio [65]

We have a sample of 28 data points. The sample mean is 30.0 and the sample standard deviation is 2.40. The confidence level required is 98%. Then, we calculate α by:

$\begin{gathered} 1-\alpha=0.98 \\ \alpha=0.02 \end{gathered}$

The confidence interval for the population mean, given the sample mean μ and the sample standard deviation σ, can be calculated as:

$CI(\mu)=\lbrack x-Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}},x+Z_{1-\frac{\alpha}{2}}\cdot\frac{\sigma}{\sqrt[]{n}}\rbrack$

Where n is the sample size, and Z is the z-score for 1 - α/2. Using the known values:

$CI(\mu)=\lbrack30.0-Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}},30.0+Z_{0.99}\cdot\frac{2.40}{\sqrt[]{28}}\rbrack$

Where (from tables):

$Z_{0.99}=2.33$

Finally, the interval at 98% confidence level is:

$CI(\mu)=\lbrack28.94,31.06\rbrack$

4 0

8 months ago

5 out of 20 students said ice cream was their favorite snack if they were a hundred six graders how many would chose ice cream P

Rufina [12.5K]

Answer:

<u>25 students</u>

Step-by-step explanation:

20 times 5 equals 100

5 times 5 equals 25

To get to 100 students you would times it by 5 and because we times'd the 20 times 5 we need to do the same to the 5 which would result in 25 students. Hope this helped! xx

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2 years ago

While walking his dog in the park, Santiago often finds change lying on the ground. This week, Santiago recorded the amount of m

choli [55]

Th y rn r my. D nI eh t

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1 year ago

Car insurance of 800 Is twice what it was a decade ago. Find the cost of the insurance then​

Car insurance of 800 Is twice what it was a decade ago. Find the cost of the insurance then