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sveta [45]
3 years ago
12

Which is closest to the surface area of a cone with dimensions as shown?

Mathematics
2 answers:
vredina [299]3 years ago
4 0

Answer:

B

Step-by-step explanation:

A=πr(r+h2+r2)=π·3·(3+42+32)≈75.39822

iogann1982 [59]3 years ago
3 0

Answer:

75.39 mm²≈ 75 mm²

Step-by-step explanation:

A=πrl+πr²

l=\sqrt{r^2+h^2}

A=πr(r+\sqrt{r^2+h^2})=π·3·(3+\sqrt{4^2+3^2})≈75.39 mm²

75.39 mm² ≈ 75 m²

If my answer is incorrect, pls correct me!

If you like my answer and explanation, mark me as brainliest!

-Chetan K

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HELP QUICK. I WILL THUMBS UP
Ugo [173]

A diagram would be nice. The quick answer is C.

The first answer makes AE 8 which is twice as long as AC. I don't think the intent of the question is to use an external point.

The second one is also incorrect. This time E is in a place such that it makes AC and AE both equal and that too isn't possible.

The third one is the answer because D and E are both 1/2 the distance between the end point of the line containing them.

D is wrong because E is the midpoint of AC but D is not the midpoint of AB.

5 0
3 years ago
Read 2 more answers
Write these as normal numbers.
ELEN [110]

Answer:

a) 510000000 c) 24.4 d) 502.3

Step-by-step explanation:

7 0
3 years ago
–4.36 − 1.6g + 7.4 = 0.3g + 6.46
Art [367]

Answer:

g = 10.82

_______ or 5.694736842105263

-1.9

Step-by-step explanation:

- 1.6g - 0.3g = 6.46 + 4.36

-1.9g = 10.82

g = 10.82

_____

-1.9

5 0
3 years ago
Sara says that median does not have to be one of the numbers in a set.
VladimirAG [237]

Answer:

I think she is correct !

Step-by-step explanation:

3 0
3 years ago
(2 points) An article in the Washington Post on March 16, 1993 stated that nearly 45 percent of all Americans have brown eyes. A
lara31 [8.8K]

Answer: a) z=1.43

b) 0.1528

Step-by-step explanation:

The given set of hypothesis :

H_0:p=0.45

H_a:p\neq0.45

Since the alternative hypothesis H_a is two-tailed , so we perform two-tailed test.

Also, it is given that : A random sample of n=76 Americans found 28 with brown eyes.

Sample proportion: \hat{p}=\dfrac{28}{76}=0.3684

a) The z-statistic would be :-

z=\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}

\Rightarrow\ z=\dfrac{0.3684-0.45}{\sqrt{\dfrac{0.45(1-0.45)}{76}}}=-1.4299121397\approx-1.43

b) P-value for two-tailed test = 2P(Z>|z|)= 2P(z>|-1.43|)

=2P(z>1.43)

=2(1-P(z≤1.43)

=2-2P(z≤1.43)

= 2-2(0.9236)[Using standard z-table]

= 2-1.8472=0.1528

Hence,  the P-value of the test= 0.1528

6 0
4 years ago
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