All categories

3 years ago

PLEASE HELP! :( What is the surface area of the right cone below?

Mathematics

2 answers:

AleksandrR [38]3 years ago

6 0

Answer:

A≈606.32

Step-by-step explanation:

you need to use this equation: A=πr(r+h^2+r^2) to figure it out...

just plug your length, height, and radius in, and u have ur answer!!

ur answer shud be A≈606.32

Hope this helps!!

DaniilM [7]3 years ago

3 0

The surface area of the right cone is 176π sq unit. Option C.

Step-by-step explanation:

Given,

The radius (r) of the cone = 8 unit

Slant height (l) = 14 unit

To find the surface area of the right cone.

Formula

The surface area of the right cone = πrl+πr² sq unit

Now,

The surface area of the right cone = π×8×14+π×8² sq unit

= 112π+64π = 176π sq unit.

You might be interested in

The difference 3 1/2 minus 1 1/2 must be between and

bija089 [108]

Answer:

Step-by-step explanation:

3 1/2 - 1 1/2 = 2

PLS GIVE BRAINLIEST

5 0

3 years ago

I can't find the answer

Rudik [331]

Answer: what grade is this

Step-by-step explanation:

3 0

3 years ago

The above figure is:

kow [346]

Answer:

non-convex polygon

Step-by-step explanation:

5 0

3 years ago

Two competing headache remedies claim to give fast-acting relief. An experiment was performed to compare the mean lengths of tim

DaniilM [7]

Answer:

$t = 0.875$

Step-by-step explanation:

Given

Brand A Brand B

$n_ 1= 12$ $n_2 = 12$

$\bar x_1 = 21.8$ $\bar x_2 = 18.9$

$\sigma_1 = 8.7$ $\sigma_2 = 7.5$

Required

Determine the test statistic (t)

This is calculated as:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

Calculate s using:

$s = \sqrt{\frac{(n_1-1)*\sigma_1^2+(n_2-1)*\sigma_2^2}{n_1+n_2-2}}$

The equation becomes:

$s = \sqrt{\frac{(12-1)*8.7^2+(12-1)*7.5^2}{12+12-2}}$

$s = \sqrt{\frac{1451.34}{22}}$

$s = \sqrt{65.97}$

$s = 8.12$

So:

$t = \frac{\bar x_1 - \bar x_2}{s\sqrt{\frac{1}{n_1} + \frac{1}{n_2}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{12} + \frac{1}{12}}}$

$t = \frac{21.8 - 18.9}{8.12 * \sqrt{\frac{1}{6}}}$

$t = \frac{21.8 - 18.9}{8.12 * 0.408}}$

$t = \frac{2.9}{3.31296}}$

$t = 0.875$

3 0

3 years ago

The circumference of a standard baseball is about 9in. About how many square inches of horsehide are required to cover 100 balls

Marta_Voda [28]

This is the concept of area of solid materials, we are required to calculate the total area of horsehide that is required to cover 100 balls with each having a circumference of 9 in.
The area of hide required will be given by:
area=(area of each ball)*(total number of balls)
area of each ball is given by:
SA=4πr^2
given that the circumference is 9in, we are required to find the radius of the ball
Circumference, c=2πr
thus;
9=2πr
r=9/(2π)
r=1.4 in
Therefore the surface area will be:
SA=4π*1.4^2=24.6 in^2
Therefore the area of horsehide required to cover 100 balls will be:
Area=24.6*100=2,460 in^2.

5 0

3 years ago