D(n)D, left parenthesis, n, right parenthesis models the duration (in seconds) of the time it took for Hailey to run her n^{th}n th
n, start superscript, t, h, end superscript lap.

step-by-step explanation:

x^2 -12x + 36 + y^2 = 36

x^2 + y^2 = 12x

r^2 = 12rcos(theta)

r = 12 cos(theta)

the equation cos(35) =a/25 can be used to find the length of bc what is the length of bc? round to the nearest tenth

step-by-step explanation: