What is the difference of the polynomials below? (-9x^3+4x+7) - (5x^2+2x+7) - 14x^3+2x
- 9x^3-5x^2+2x
- 14x^3+6x+14
- 9x^3-5x^2+6x+14
please someone show and tell me each step too

Apple pie is removed from 350 degree oven. temperature of the pie t minutes after being removed id given by the function t(t)=72+268e-0.068t

Suppose the radius of a circle is 16. what issuppose the radius of a circle is 16. what is its circumference its circumference

On a string instrument, the length of a string varies inversely as the frequency of its vibrations. an 11-inch string has a frequency of 400 cylces per second. find the frequency of a 10-icnch string.