I NEED HELP HURRY 12 times 123,456,789

In the polynomial below, what number should replace the question mark to produce a difference of squares? x2 + ? x - 36

What is the volume of the cone to the nearest cubic millimeter? (use π  = 3.14) a) 46 mm3 b) 128 mm3 c) 183 mm3 d) 275 mm3 diameter = 5 mm height = 7 mm how do you do this problem step by step?

Indicate the formula for the following conditions: p^c(n, r)=