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1 year ago

14

The number of cases of a new disease can be modeled by the quadratic regression equation y = -2x^2 + 36x + 6, where x represents

the year.
Which is the best prediction for the number of new cases in year 15?

1 answer:

Svet_ta [14]1 year ago

8 0

Answer:

A hope it helps follow please

Step-by-step explanation:

hope you have a great day today

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John has a round swimming pool the distant from the center of the pool to the edge 3 m which formula can I used to find the area

DerKrebs [107]

The formula that you will use will be the formula for the area of a circle, which is as follows:
A= Pi r^2
(Pi times the radius squared)

5 0

3 years ago

In a parallelogram PQRS, if angle P = (2x+25) degrees and angle Q = (3x-5) degrees, then write the measures of angle S and angle

krek1111 [17]

Consecutive angles of a parallelogram are supplementary, so:

$2x+25+3x-5=180\\5x+20=180\\5x=160\\x=32$

This means $m\angle P=2(32)+25=89^{\circ}$ and that $m\angle Q=3(32)-5=91^{\circ}$ .

Since opposite angles of a parallelogram are congruent,

$\boxed{m\angle S=91^{\circ}, m \angle R=89^{\circ}}$

6 0

2 years ago

The Central Limit Theorem tells us that for population distribution(s), if we repeatedly take new random samples from this distr

sertanlavr [38]

Answer:

d. If your sample size is very large, the distribution of the sample averages will look more like distribution.

Step-by-step explanation:

The central limit Theorem states that for population distribution if you repeatedly take samples from the distribution, then the normal thing for it to happen would be that the distribution means of the samples will be normally distributed, this is what it states, the option that comes closer to that statement would be d. If your sample size is very large, the distribution of the sample averages will look more like distribution, because they large sample will create for a normally distributed means distribution.

7 0

4 years ago

1. A flower shop wishes to add the valuable Waimea orchid to its product list. They purchase a large shipment of bulbs from a su

AysviL [449]

Answer:

The concern of the florist that these bulbs are not Waimea orchids, but a similar appearing hybrid maybe true.

Step-by-step explanation:

A Chi-square goodness of fit test can be used to perform the hypothesis test.

The hypothesis is defined as:

<em>H</em>₀: There is no difference between the observed and expected value.

<em>Hₐ</em>: There is a difference between the observed and expected value.

The test statistic is:

$\chi^{2}=\sum \frac{(O-E)^{2}}{E}$

The total number of Waimea orchid bulbs is, 60.

7x + 5x + 4x + 4x = 60

20x = 60

x = 3

The expected number of Waimea orchid bulbs are:

Blue = 7 × 3 = 21

Red = 5 × 3 = 15

Violet = 4 × 3 = 12

Orange = 4 × 3 = 12

Consider the table provided.

The test statistic value is:

$\chi^{2}=\sum \frac{(O-E)^{2}}{E}=14.981$

The decision rule:

The null hypothesis will be rejected if $\chi^{2}\geq \chi^{2}_{\alpha, (k-1)}$ .

Compute the critical value as follows:

$\chi^{2}_{0.05, (4-1)}= \chi^{2}_{0.05, (3)}=7.815$

The test statistic value is 14.981.

$\chi^{2}=14.981> \chi^{2}_{\alpha, (k-1)}=7.815$

The null hypothesis will be rejected at 5% level of significance.

Conclusion:

As the null hypothesis was rejected it implies that there is a significant difference between the observed and expected value.

Thus, the concern of the florist that these bulbs are not Waimea orchids, but a similar appearing hybrid maybe true.

4 0

4 years ago

Find the length of the arc, s, on a circle of radius r intercepted by a central angle 0. Express the arc length in terms of π.

777dan777 [17]

Answer:

5π or 15.71 inches

Step-by-step explanation:

Length of an arc = $\frac{x}{360}$ × 2πr

Where x is the angle and r is the radius

so $\frac{90\\}{360}$ × 2 × π × 10

0.25 × 2 × π × 10

Arc length = 5π inches (answer in terms of π)

= 15.71 inches (answer in two decimal places)

8 0

3 years ago