Answer:
D. 221.7 cm
Step-by-step explanation:
Surface area of a sphere is: 
'r' - radius
We are given the radius of 4.2 centimetres.
221.5584 ≈ 221.6
The closest answer is Option D, therefore it should be the correct answer.
Answer:
1
Step-by-step explanation:
It’s c because the x is exterior angles
Sorry for the way it came out but the Answer:
2
x
+
5
=
43
∘
3
x
−
10
=
47
∘
Explanation:
A complementary angles means angles that add up to
90
degrees. The two angles given in the question are complementary angles.
So
Our first angle
(
2
x
+
5
)
plus the second angle
(
3
x
−
10
)
is equal to
90
degrees
(
2
x
+
5
)
+
(
3
x
−
10
)
=
90
Now we solve for
x
, first we add up the like terms
2
x
+
3
x
+
5
−
10
=
90
5
x
−
5
=
90
Add
5
to both sides
5
x
=
95
Divide both sides by
5
we get
x
=
19
Now and after we find
x
we substitute it to get our two angles
2
x
+
5
=
2
(
19
)
+
5
=
43
∘
3
x
−
10
=
3
(
19
)
−
10
=
47
∘
Hope it helps :)
Step-by-step explanation:
all we can really cancel is one of the (x-5) and the "x", is all.
