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2 years ago

The chart below shows the distribution of weeds in a yard.

Mathematics

2 answers:

labwork [276]2 years ago

8 0

Answer:

just so you know its actually..

C) No, this is not a representative sample because each type of weed should be represented in proportion to the number of weeds actually present in the yard.

I hope this solves your confusion I-

timurjin [86]2 years ago

6 0

Answer:

The chart below shows the distribution of weeds in a yard

A circle graph titled Lawn weeds. The largest proportion is crab grass, then dandelion, then clover, then chickweed.

A lawn-care specialist chooses a random sample from the yard and determines the number of weeds in the sample. The results of the sample are shown in the table below.

Weed Type

Number

Dandelion

Clover

Crab Grass

Chickweed

Which explains whether or not this is a representative sample?

what is the answer to this question?

Step-by-step explanation:

The answer is clover i think bro

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A circular jogging track forms the edge of a circular lake that has a diameter of 2 miles. Johanna walked once around the track

harkovskaia [24]

Answer:

C. 2.0 < t < 2.5

Step-by-step explanation:

time = distance / speed

The circumference of the lake is given by ...

C = πd = 2π miles ≈ 6.28 miles

Then Johanna's time is ...

(6.28 mi)/(3 mi/h) ≈ 2.09 h

This time is in the interval (2, 2.5), so matches choice C.

___

<em>Alternate solution</em>

If we take pi to be 3, then this boils down to ...

2×3/3 = 2 . . . hours

Pi is on the order of 5% more than 3, so her time will be on the order of 5% more than 2 hours, or just above 2, but not as great as 2.5 hours. This sort of estimating can get you to the correct answer without a calculator.

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2 years ago

The highest recorded temperature during the month of July for a given year in Death Valley, California has an approximately norm

S_A_V [24]

Answer:

$P(X$

And we can find this probability using excel or the normal standard tabe and we got:

$P(z$

Step-by-step explanation:

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".

Solution to the problem

Let X the random variable that represent the temperatures of a population, and for this case we know the distribution for X is given by:

$X \sim N(123.8,3.1)$

Where $\mu=123.8$ and $\sigma=3.1$

We are interested on this probability

$P(X$

And the best way to solve this problem is using the normal standard distribution and the z score given by:

$z=\frac{x-\mu}{\sigma}$

If we apply this formula to our probability we got this:

$P(X$

And we can find this probability using excel or the normal standard tabe and we got:

$P(z$

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3 years ago

A company sells widgets. The amount of profit, y, made by the company, is related to the selling price of each widget, x, by the

GaryK [48]

Answer:

So profit is denoted by Y
Selling price is denoted by X

Hencd we have Y= X + B

Where Be can be a constant for example how much he already sold or etc.

Rate positively and give brainlist

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2 years ago

Divide.

In-s [12.5K]

Hii

The answer us - 5/4

Sorry if incorrect

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2 years ago

Read 2 more answers

Show the work and answer for 5550÷10 to the third power

emmainna [20.7K]

Well I know the answer is 555 because when ever you are dividing by ten move the decimal place u move the decimal 1 place to the left or just take out the 0 at the end

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2 years ago