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ankoles [38]
3 years ago
15

What is the radius of a sphere with a surface area of 100 pi cm2

Mathematics
2 answers:
deff fn [24]3 years ago
7 0
I think it is around 23
Ksenya-84 [330]3 years ago
6 0
The surface area of a sphere is 4r^2pi, so dividing 100 by 4pi gives a result of 25/pi.  Taking the square root and rationalizing the denominator, we have 5sqrt(pi)/pi as the radius of the sphere.
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If the 6th term of an A.P. is 46, find the sum of first 11 terms.​
zaharov [31]

Answer:

506

Step-by-step explanation:

:. t6 = 46 ... [ Given ]

tn = a+(n-1) d ... [ Formula ]

:. t6 = a+(6-1) d

:. 46 = a+5d ... [1]

Sn = n/2 [2a+(n-1)d] ... [ Formula ]

:. S11 = 11/2 [2a+(11-1) d]

:. S11 = 11/2 [2a+10d]

:. S11 = 11/2x2 [a+5d]

:. S11 = 11[46] ... [ From (1)]

:. S11 = 506

5 0
3 years ago
3/7 of the people living in the apartment building are men. 5/8 of the remaining are women. The rest are children. A total of 27
Vladimir [108]
People in building ---- x (men, women and children)
children --- y
men + women + children = x
(3/7)x + (5/8)(4/7)x + y = x
3x/7 + 5x/14 + y = x
times 14
6x + 5x + 14y = 14x
14y = 3x

y + 220 =x
sub into the other one
14y = 3(y+220)
11y = 660
y = 60
then 14(60) = 3x ---> x = 280

So we have 280 people in the building.

check: 3/7 of 280 are men = 120
leaving 160 women and children
5/8 of these ot 100 are women

so we have 120 men, 100 women and 60 children!

hope this is right! have a great. day
7 0
3 years ago
Sub to me at kalelowsdoes12 and I will sub to you on 5 accounts anyone
garri49 [273]

Answer:

okay i will dont sub to me

Step-by-step explanation:

can i have brainliest

6 0
3 years ago
Read 2 more answers
Rx+9/5=h solve for x
Vika [28.1K]
When solving the equation, you first have h- 9/5. So it would by x=(h - 9/5). But you are not done yet. you still have to divide it by R to get x. So the final equation is x=(h - 9/5) ÷ R
7 0
3 years ago
Translate the following into an equation <br> “the sum of the number and three is fivem
guapka [62]

Answer:

n+3=5m

Step-by-step explanation:

3 0
3 years ago
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