A quater has a diameter of 24 milimters. what is the area of the quarter?

144 mm²

Step-by-step explanation:

First you find the radius which is the diameter. The radius is which equals twelve. Then you find the area using the equation where A is the area and r is the radius. Substituting 12 for r, you get 144 mm²

hello from mrbilldoesmath!

answer:

a(n) - a(n-1) -3

discussion:

this ones a bit interesting. given a(n) = 5 - 3n consider this:

a(n-1) = 5 - 3(n-1)

          = (5 - 3n) + 3             => but a(n) = 5 - 3n, the first term

          = a(n)   + 3                 => subtract 3 from both sides

a(n-1) -3 = a(n)  

or

a(n) - a(n-1) -3

you,

mrb

the answer is 1/4

step-by-step explanation: