Answer:

Step-by-step explanation:
Surface area ⇒ area of 2 triangles + area of 3 rectangles

I think its -40 because it looks like you have negative 40 then ur adding 10
The length of the minor arc AB is 6.3cm
It took me awhile but I got it
m= -2/7
b=5 5/7
or
y=-2/7x+5 5/7