A cylindrical water tank 4 ft. in diameter is on its side and has
water in it with a depth of 1 ft. at its deepest point. What % of
the tank's capacity is being used?

it happens during combustion and impacts the environment because the plants and trees take in that and it can cause them to die.

hello from mrbilldoesmath!

answer:   x^2 + y^2 = 1024

discussion:

the equation of a circle with center (h,k) and radius "r" is

(x-h)^2 + (y-k)^2 = r^2.

in our case

(x-0)^2 + (y-0) ^2 = 32^2 = 1024

you,

mrb