8.3 × 3 = 24.9
45 + 24.9 = 69.9
Hope this helps!
Answer:
second one diagram rotated 120
Answer:
r=1/π
Step-by-step explanation:
Area of the circle is defined as:
Area = πr²
Derivating both sides
=2πr
=
x
= 2πr
If area of an expanding circle is increasing twice as fast as its radius in linear units. then we have :
=2
Therefore,
2πr
= 2 
r=1/π
Answer:
12
Step-by-step explanation:
N - 3 = 9
Add 3 on both sides,
N - 3 + 3 = 9 + 3
N = 12