Question

@satellite73
What is the surface area of a sphere with a radius of 30 m?
A)900π m2
B)90,000π m2
C)3,600π m2
D)1,800π m
https://pwnd9373-ndscholarship-ccl.gradpoint.com/Resource/630568,72F,0,0,0,0,0/Assets/testitemimages/geometry_b/surface_area_and_volume/mc101-1.jpg

Answer 1

\[S.A = 4 \pi r ^{2}\]
Substitute and solve.

Answer 2

\[4(3.14)(30^2)=11304\]

Answer 3

No don't substitute pi just do it pi(4)(900) = ?

Answer 4

\[(4)(900)=600\]

Answer 5

No , what is 4 x 9 ?

Answer 6

i said 3600 for the answer but 4 time 9 is 36

Answer 7

\( SA_{sphere} = 4 \pi r^2 \)

\( SA_{sphere} = 4 \pi (30 ~m)^2 \)

\( SA_{sphere} = 4 \pi (900 ~m^2) \)

\( SA_{sphere} = 3600 \pi ~m^2 \)

Answer 8

@mathstudent55 hello i appreciate you helping me

Answer 9

https://pwnd9373-ndscholarship-ccl.gradpoint.com/Resource/630568,72F,0,0,0,0,0/Assets/testitemimages/geometry_b/circles/mc073-1.jpg
what is the length of AC

Answer 10

When two secants are drawn to a circle from a point outside the circle, the product of one secant and its external segment is equal to the product of the other secant and its external segment.

Answer 11

honestly am still confused on this whole issue

Answer 12

this is what the problem is

Answer 13

\( BC \times AC = DC \times EC \)

Answer 14

\[BC * AC=DC *EC\]

Answer 15

Right. Now plug in the three numbers you know and solve for AC.

Answer 16

6*x=60=6x/6=60/6
10=x
correct

Answer 17

can you help me with this problem please
https://pwnd9373-ndscholarship-ccl.gradpoint.com/Resource/630568,72F,0,0,0,0,0/Assets/testitemimages/geometry_b/right_triangles_and_trigonometry/mc051-1.jpg

Answer 18

in triangle ABC ,AB=3 and AC=9 what M<B to the nearest degree

Answer 19

You are correct.
This is how you write it:

\(BC \times AC = DC \times EC\)

\(6 \times AC = 5 \times 12\)

\(6(AC) = 60 \)

\(AC = 10\)

Answer 20

Start a new post for each new problem. Close this one.