Heee i have no idea how to do !

you are building an 8000-square-foot rectangular pen with three sides fenced along a river. the side parallel to the river faces nice homes and must be built using cedar costing $5 per foot. the other two sides can be built using chain link costing $2 per foot. what dimensions will minimize the cost of the fence?

i really need can someone show me step by step : ( !

the infinity sign

step-by-step explanation:

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:

i think the answer is b

hello from mrbilldoesmath!

answer:   x (x+6)^2, choice b

discussion:

factor x out of the equation:

x^3 + 12x^2 + 36x = x (x^2 + 12x + 36).

note that 6+6 = 12 and 6*6 = 36 so the above factors into:

x (x+6)^2

which is choice b

you,

mrb