What is the rate of savings (%) if the original price of

the vacuum is $99.99

(whole) and the sale price,

$79, is $20.99 less (part)?

answer   download the app called socratic on your phoner:

step-by-step explanation:

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