Circumference is given by

Area is given by

figure out the radius of the circle, then use it to find area
Answer:
A
Step-by-step explanation:
Im pretty sure its A because
55ish plus 15ish equals 70 which is their ages combined
55-60 is also 4 x 15
Ok so, this one is a confusing one for me but what I recomend is going on a website call desmos , they have a graphing area there and use y=-4x-7 if I’m right, I do not know so don’t trust me on this
Answer:
Step-by-step explanation:
part A)
given

so y in terms of x would be

part b)
in order to find intervals of function, we determine the intervals where the function has a positive first derivative . To find intervals, first we find the critical values, or points at which the first derivative of the function is equal to zero. For the given function the intervals would be
put zero in equation


put 1

put 2

put 3

hence we can see that the interval is from zero to positive infinity
(PINF)