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3 years ago

URGENT!!! Can someone help me with this? It’s volume of cones!!!

Mathematics

1 answer:

LiRa [457]3 years ago

8 0

Answer:

1232 m^3 to nearest whole number.

Step-by-step explanation:

The volume of a cone = 1/3 π r^2 h where r = radius of base and h = height.

The radius of the base = 1/2 * 14 = 7m.

The height can be found by using the Pythagoras theorem:

25^2 = h^2 + 7^2

h^2 = 625 - 49 = 576

h = √576 = 24m

So the volume = 1/3 π * 7^2 * 24

= 1231.504 m^3.

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A university with a high water bill is interested in estimating the mean amount of time that students spend in the shower each d

Bas_tet [7]

Answer: $(4.0845,\ 6.5755)$

Step-by-step explanation:

As per given , we have

n = 11

$\overline{x}=5.33\\\\ s=1.33$

Since population standard deviation is missing, so we use t-test.

Critical t-value for 99% confidence :

$t_{\alpha/2,\ n-1}=3.106$ [using two-tailed t-value table]

Confidence interval :

$\overline{x}\pm t_{\alpha/2}\dfrac{s}{\sqrt{n}}\\\\= 5.33\pm (3.1060)\dfrac{1.33}{\sqrt{11}}\\\\\approx5.33\pm1.2455\\\\=(5.33-1.2455,\ 5.33+1.2455)\\\\=(4.0845,\ 6.5755)$

Hence, 99% confidence interval for the mean amount of time that students spend in the shower each day.= $(4.0845,\ 6.5755)$

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2 years ago

Two angles are supplementary if the sum of their measure is 180 degrees. If one of the two supplementary angles measures 85 degr

ale4655 [162]

Answer:

95 degrees.

Step-by-step explanation:

Their sum is 180. You will subtract 85 to get the other half of the whole.

180 - 85 = 95

The other angle is 95 degrees.

4 0

2 years ago

Help asap !<br><br> -100x - 100 = 0<br> -100x = ?<br> x = ?

marin [14]

Answer:

-100x = 10 x = 1

Step-by-step explanation:

I did the math and this is what I got

6 0

2 years ago

a rectangular park has an area of 2/3 square miles the length of the park is 2 and 2/3 the width of the park what is the Widht o

r-ruslan [8.4K]

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3 years ago

What is the slope of the line that passes through the points listed in the table?

Rama09 [41]

Answer:

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Step-by-step explanation:

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2 years ago