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3 years ago

Need to know the area of the composite figure.

Mathematics

1 answer:

MariettaO [177]3 years ago

4 0

Answer:

Step-by-step explanation:

you can figure out the area by using two formulas: area of a circle (on each end are two semi circles which when combined, make a circle) and area of a rectangle

Acircle: pi(r^2) = pi(5^2) = 25pi

Arectangle: length*width = 20*10 = 200ft^2

area of composite figure: (25pi ft^2) + 200ft^2

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Explain the difference between observed frequency and expected frequency as it relates to Chi-Square test.

emmasim [6.3K]

Answer:

Step-by-step explanation:

A Chi-square test is used to test the test of independence between rows and columns, contingency tables. It is a test related to frequencies. The observed frequency is a given statistical frequency known as the actual frequency, the expected frequency is known as the theoretical frequency is derived from the study by using the sum total of the row and total in the column divided by their corresponding sample size.

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3 years ago

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Annette [7]

Answer:

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Step-by-step explanation:

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3 years ago

6(n-4)=3n<br> I need help I’m not good with math

lina2011 [118]

Answer:

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Step-by-step explanation:

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3 years ago

Read 2 more answers

Give an example of this when adding two rationalnumbers with different signs and provide the product.

kolezko [41]

ANSWER:

$\begin{gathered} \frac{4}{5}+-\frac{8}{3}=-\frac{28}{15} \\ \frac{4}{5}\cdot-\frac{8}{3}=-\frac{32}{15} \end{gathered}$

STEP-BY-STEP EXPLANATION:

Rational numbers are all numbers that can be expressed as a fraction, that is, as the quotient of two whole numbers.

Therefore, an example would be:

$\begin{gathered} \frac{4}{5}\text{ and - }\frac{8}{3} \\ \text{adding} \\ \frac{4}{5}+-\frac{8}{3}=\frac{4}{5}-\frac{8}{3} \\ \frac{4}{5}-\frac{8}{3}=\frac{4\cdot3-5\cdot8}{5\cdot3}=\frac{12-40}{15}=-\frac{28}{15} \\ \text{ product} \\ \frac{4}{5}\cdot-\frac{8}{3}=-\frac{4\cdot8}{5\cdot3}=-\frac{32}{15} \end{gathered}$

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1 year ago

If a stock falls from $14.89 to $6.47, then what is its percentage of change?

maxonik [38]

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Step-by-step explanation:

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3 years ago