(x+8)^(2) + (y+9)^(2) = 169
(x+8)^(2) + (y+9)^(2) = 13^2
h = -8
k = -9
r = 13
answer
A. center (-8,-9)
radius = 13
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(x-7)^2 + y^2 = 225
(x-7)^2 + y^2 = 15^2
h = 7
k = 0
r = 15
answer
B. center (7,0)
radius = 15
50% since you have a half chance of getting 1 to 4 and other half is 4-8
The correct formula to use when finding the area of this triangle is A= 1/2(b)(h). Hope this helps.
The dog food food will last for 16 days
16x8=128
