Answer:
78.5 units²
Step-by-step explanation:
Area of a circle = πr²
r = 5
∴ Area of a circle = π5² = 25π = 25*3.14 = 78.5
Not quite sure about #1 but x=58°
By Pythagoras Theorem,
Length= (20^2 - 15^2)^0.5= (175)^0.5=5√7
Answer:
I think the answer is C. 13.
Step-by-step explanation:
(-2)^2-(-8)+1
4+8+1
12+1
13