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pentagon [3]
3 years ago
7

Can someone help please

Mathematics
2 answers:
Goryan [66]3 years ago
8 0
The formula for S.A. of a cylinder: S.A. = 2πr² + 2πrh (given).

r is radius, which is half the diameter. The diameter is 6 in, thus the radius is 3 in. h is height; the height of this cylinder is 8 in. Let's plug in our numbers and solve.

S.A. = 2π3² + 2π(3)(8)
S.A. = 2π9 + 2π24
S.A. = 18π + 48π
S.A. = 66π

Since the question says not to round, we must leave the answer in terms of pi.

Answer:
S.A. = 66π
tresset_1 [31]3 years ago
6 0
I dont really know but my guess is 48?

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To help consumers assess the risks they are taking, the Food and Drug Administration (FDA) publishes the amount of nicotine foun
QveST [7]

Answer:

We conclude that  the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

Step-by-step explanation:

We are given the following in the question:  

Population mean, μ = 31.7 milligrams

Sample mean, \bar{x} = 28.5 milligrams

Sample size, n = 9

Alpha, α = 0.05

Sample standard deviation, s =  2.8 milligrams

First, we design the null and the alternate hypothesis

H_{0}: \mu = 31.7\text{ milligrams}\\H_A: \mu < 31.7\text{ milligrams}

We use One-tailed t test to perform this hypothesis.

Formula:

t_{stat} = \displaystyle\frac{\bar{x} - \mu}{\frac{s}{\sqrt{n}} }

Putting all the values, we have

t_{stat} = \displaystyle\frac{28.5 - 31.7}{\frac{2.8}{\sqrt{9}} } = -3.429

Now, t_{critical} \text{ at 0.05 level of significance, 8 degree of freedom } = -1.860

Since,                  

t_{stat} < t_{critical}

We fail to accept the null hypothesis and accept the alternate hypothesis. We conclude that  the mean nicotine content is less than 31.7 milligrams for this brand of cigarette.

3 0
3 years ago
The length of a rectangle is 24 units. Can the perimeter x of the rectangle be 60 units when its width y is 11 units? (1 point)
zlopas [31]
The first choice is correct. No, the rectangle cannot have x=60 and y=11 because x=48+2y.

Perimeter is x=2w+2y. Therefore x=2(24)+2(11) which equals 70 not 60.
7 0
3 years ago
What is the distance around a triangle that has sides measuring 2/18 feet 3/12 feet and 2/12 feet
Minchanka [31]
The distance around an object is called the perimeter. To get the perimeter, you add up the sides. So, 2/18 + 3/12 + 2/12 = your answer.


4 0
3 years ago
Ellipsis a set of three dots at the end of a number used to indicate that the number will infinitely continue in the same patter
alexdok [17]

Answer:

Match the vocabulary words to the proper definition.

1. a decimal that ends  

2

repeating decimal  

2. a decimal whose digits to the right of the decimal point repeat indefinitely  

1

terminating decimal  

3. a set of three dots at the end of a number used to indicate that the number will infinitely continue in the same pattern  

4

irrational number  

4. a horizontal bar used in mathematical notation; in fractions, it is the bar that separates the numerator from the denominator; in repeating decimals, it indicates a group of repeating numbers  

6

vinculum  

5. a number that can be written as a ratio in fraction form  

3

ellipsis  

6. a number that, when in decimal form, does not terminate or repeat  

5

rational number

Step-by-step explanation:

3 0
3 years ago
HELP ME!!!T^T
andreev551 [17]
I'm pretty sure there where 64 teams in the start of the tournement
4 0
3 years ago
Read 2 more answers
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