Answer:

Step-by-step explanation:
The area of the triangle.





The surface area formula for any sphere is 4(pi)(radius)^2
The radius is half of the diameter.
18.6 / 2 = 9.3
So, plug into the formula and solve.
4(3.14)(9.3)^2 = 1086.3 mm^2
There are 23 nickles in her purse
Answer:
44
Step-by-step explanation:
The angle subtends the arc with measure of 88 degrees, so it has to be 88/2 which is 44.