2 years ago

. The regular price of a scooter is $89.99. The scooter is on sale for 20%

Mathematics

1 answer:

Artyom0805 [142]2 years ago

3 0

Answer:

Step-by-step explanation:

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Cost of most expensive product = $40

total money spent at the store
= 18 + 22 + 35
= 75

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3 years ago

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Draw a model to show 30/4 as a mixed number

vitfil [10]

30/4 is also equal to 7 1/2.

30/4 = 7.5

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3 years ago

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In 2008, there were 507 children in Arizona out of 32,601 who were diagnosed with Autism Spectrum Disorder (ASD) ("Autism and de

Svetach [21]

Answer:

The 99% confidence interval for the proportion of ASD in Arizona is (0.014, 0.018).

Step-by-step explanation:

The information provided is as follows:

$x=507\\n=32601\\\text{Confidence level }=99\%$

The sample proportion is:

$\hat p=\frac{x}{n}=\frac{507}{32601}=0.016$

The critical value of <em>z</em> for 99% confidence level is, <em>z</em> = 2.56.

Compute the 99% confidence interval for the proportion of ASD in Arizona as follows:

$CI=\hat p\pm z_{\alpha/2}\cdot\sqrt{\frac{\hat p(1-\hat p)}{n}}$

$=0.016\pm 2.58\cdot\sqrt{\frac{0.016(1-0.016)}{32601}}\\\\=0.016\pm 0.0018\\\\=(0.0142, 0.0178)\\\\\approx (0.014, 0.018)$

Thus, the 99% confidence interval for the proportion of ASD in Arizona is (0.014, 0.018).

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2 years ago

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Neporo4naja [7]

Answer:

Step-by-step explanation:

Let the original number be x.

x/2 = 39.5

x = 39.5 × 2

x = 79

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3 years ago

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