Answer:
Area: 7850 square cm
Perimeter: 314 cm.
Step-by-step explanation:
The area is 
. With r=50, 
=2500π which is about (2500)(3.14)=7850.
The perimeter is 
which is the same as (diameter)(π). The diameter is 100, so 
which is about (100)(3.14)=314.
Answer:
$40 in interest and $240 in total
Step-by-step explanation:
find 5% of 200: 200 x 0.05=10
it's for four years, so multiply times four: 10x4=40
that's the amount of interest so now add that to her original 200 and you get 240!
Answer:
GH = 6 units
Step-by-step explanation:
Calculate GC using Pythagoras' identity in right triangle GCE
GC² = 9² + 12² = 81 + 144 = 225 ( take the square root of both sides )
GC = 
= 15
GH + HC = GC ← HC is the radius of the circle and HC = 9, thus
GH + 9 = 15 ( subtract 9 from both sides )
GH = 6
Answer:x=18
Step-by-step explanation:
3(x-5)=x+21
Distribute the 3
3x-15=x+21
Add 15 to each side
3x=x+36
Subtract x from each side
2x=36
Divide each side by 2
x=18
