If one of our zeros is 4, then the factor is x-4. If the second zero is 5i, then the conjugate root theorem says there HAS to be a root that is -5i. So our 3 factors are (x-4)(x+5i)(x-5i). We will FOIL out these factors to get the polynomial. Let's start with the ones that contain the imaginary numbers. Doing that mutliplication we get x^2-25i^2. i^2 is equal to -1, so what that expression simplifies down to is

. Now we will multiply in that last factor of (x-4):

. FOILing out we have

. There you go!
The answer is in the photo, sorry if it isn’t correct
2- and 3- not sure though
A=LW
7x^3-42x^2=L(7x^2)
7x^2(x-6)=L(7x^2)
divide both sides by 7x^2
x-6=L
legnth=x-6
13. biased becasue they call documentary boring and action movie exiting, that is subjective, they should say, documentary or action movie, and not dexscribe it
14. survey in health club
helathy peopel probably don't drink alot of differnt beverages (maybe only sports drinks or water)
biases
12. L=x-6
13. biased
14. biases