Answer:
Hi,
Step-by-step explanation:
I don't know the name in Enghish but in French it is "une règle de 3"
(may be linear rule)
arc length= 2*π*r/360*100=50*π/9
area= π*r²*100/360=250*π/9
Ion even kno, i’m just doin this so i can get help
I know 6% of $3000 is $180
But I don't understand the rest of the question.

solve for "a", to get the coefficient, and then plug it back in the equation.