Answer:
- The surface area of the sphere in terms of r is 4πr^2 square units.
- The surface area of the cylinder in terms of r is 4πr^2 square units.
- The surface area of the cylinder and sphere are the same.
Step-by-step explanation:
The surface area of the sphere is given by the formula ...
A = 4πr^2
The surface area of the cylinder is given by the formula ...
A = 2πr^2 +2πrh
Here, the height (h) is equal to r, so this simplifies to ...
A = 2πr^2 +2πr·r = 4πr^2 . . . . . the same area as the sphere
7/28 =
7/(22 × 7) =
(7 ÷ 7) / ((22 × 7) ÷ 7) =
1/22 =
1/4
Answer:
53.3 degrees
Step-by-step explanation:
∆DEF and ∆RSQ are similar. We know this, because the ratio of their corresponding sides are equal. That is:
DE corresponds to RS
EF corresponds to SQ
DF corresponds to RQ.
Also <D corresponds to <R, <E corresponds to <S, and <F corresponds to <Q.
The ratio of their corresponding sides = DE/RS = 6/3 = 2
EG/SQ = 8/4 = 2
DF/RQ = 4/2 = 2.
Since the ratio of their corresponding sides are equal, it means ∆DEF and ∆RSQ are similar.
Therefore, their corresponding angles would be equal.
Thus, m<Q = m<F
Let's find angle F
m<F = 180 - (98 + 28.7)
m<F = 53.3°
Since <F corresponds to <Q, therefore,
m<Q = 53.3°
Answer: 4x+2(2x−5)−(3−5x) = 8x-10-3+5x
Step-by-step explanation: We need to find the equivalent expression to 4x+2(2x−5)−(3−5x).
Using distributive property as follows :
a(b+c) = ab+ac
4x+2(2x−5)−(3−5x) = 4x+4x-10-3+5x
= 8x-10-3+5x
Option (e)
Hence, the correct option is (e) "8x-10-3+5x"