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4 years ago

Find the surface area of the cone to the nearest tenth.

Mathematics

2 answers:

vfiekz [6]4 years ago

7 0

Surface area = base area + side area

= pi * 7^2 + pi * 7 * 27 = 238pi = 747.7 cm^2

leonid [27]4 years ago

3 0

So i also need closure on this question actualy taking the geometry examen rn... and i figured i had to do (pi)* 7^2 = 152.938......
soooo like this is what you gone do....
(pi) * 7^2+ (pi) *7 *27
=747.6990.....
hope this helps
THE STRUGGLE IS REAL

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Please help!!!! Im so bad at math

kakasveta [241]

Answer:

-5.

Step-by-step explanation:

f(n) = 5n + 6

Just plug in -11/5 for n:

f(-11/5) = 5 (-11/5) + 6

= -11 + 6

= -5.

5 0

4 years ago

Alexis received an 85, 89, and 92 on three tests. How many points does she need to score on her next test in order to have an av

Tpy6a [65]

Alexis needs to score at least 96 points on her next test in order to have an average of at least 90.

explanation:
85+89+92+96= 360
359/4=90

6 0

3 years ago

5.75% of x = 28000<br> What is x?

kkurt [141]

Answer:

x = 486956.5217

Step-by-step explanation:

5.75% of x = 28000

Of means multiply

Change the percent to a decimal

.0575 * x = 28000

Divide by .0575 on each side

.0575/.0575 * x = 28000/.0575

x = 486956.5217

8 0

3 years ago

Seattle, WA and San Francisco, CA lie on the same longitudinal line. San Francisco is at 38° latitude and Seattle is at 47° lati

Helen [10]

Step 1.

Calculate measure of angle α:

$47^o-38^o=9^o$

Step 2.

Calculate what fraction of the angle 360° is the angle α:

$\dfrac{9^o}{360^o}=\dfrac{1}{40}$

Step 3.

Calculate the circumference of the Earth (circle):

$C=2\pi r\to C=2\pi\cdot4000=8000\pi\ mi$

Step 4.

The length of arc is equal 1/40 of the circumference:

$\dfrac{1}{40}C=\dfrac{1}{40}\cdot8000\pi=200\pi\ mi$

$\pi\approx3.14\to\dfrac{1}{40}C\approx200\cdot3.14=628\ mi$

<h3>Answer: A) 628 miles</h3>

7 0

4 years ago

What is the value of y in the equation 3(3y − 15) = 0? 5 6 7 9

mezya [45]

Y = 5
3(3y - 15) is also equal to 9y - 45, which means to find y, you have to divide 45 by 9, which is 5.

4 0

3 years ago