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3 years ago

I need help with this question, thank you. EXPLAIN.

Mathematics

2 answers:

ratelena [41]3 years ago

8 0

Answer:

263.76

Step-by-step explanation:

It is 7 times 12 times 3.14. Then you round your answer

Genrish500 [490]3 years ago

3 0

The formula for the volume of a cylinder is V=πr^2h. Which is volume equals pie * radius squared * height. pie = 3.14. radius is diameter/2, 3.5 in this case, then squared which is 3.5 * 3.5. And the height is 12. You take 3.14, 3.5^2, and 12 then multiply each term. So your substituted equation would be V=3.14(3.5^2)12.

This is how it would go:

V=3.14(3.5^2)12.
3.5^2 = 12.25.
- just squared 3.5, that equals 12.25

V=3.14(12.25)12
3.14 * 12.25 = 38.465
- pie times 12.25 equals 38.465

V=38.465(12)
38.465 * 12 = 461.58
- 38.465 * 12 = 461.58

V=461.58
- Your answer is 461.58 centimeters!!

if you didn’t know,
^ is what you use for exponents
* is what you use for multiplying

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Dafna1 [17]

Answer:

18.18 /// 17.9982

Step-by-step explanation:

Multiplying by 100 means moving up the other number by two digits,

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3 years ago

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An ABC News poll asked adults whether they felt genetically modified food was safe to eat. 35% felt it was safe, 52% felt it was

Masteriza [31]

Answer:

The proportions differ from those reported in the survey.

Step-by-step explanation:

The Chi-square goodness of fit test would be used to determine whether the proportions differ from those reported in the survey.

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Assume that the significance level of the test is, α = 0.01.

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$\chi^{2}=\sum\limits^{n}_{i=1}{\frac{(O_{i}-E_{i})^{2}}{E_{i}}}$

Consider the Excel sheet provided.

The Chi-square test statistic value is 191.32.

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3 years ago

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disa [49]

Answer:

Wesley needs 32 displays for his stamp collection

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Alisiya [41]

Let the base of the ladder be x ft and the extension be y ft.

"when fully extended, a ladder is 28 feet in length."

means: x+y=28

"the extension is 4 feet shorter than the base"

means: y=x-4, that is x-y = 4, (taking y to the side of x, and -4 to the other side of x and y)

thus, we have the system of equations:

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2 years ago

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