Determine the values of k so that the equation has two real roots.

x^2+8x+k=0

k must be less than 16.

Step-by-step explanation:

For the equation to have 2 distinct real roots the discriminant (b^2 - 4ac) must be greater than 0 zero.

So we have the inequality  8^2 - 4*1*k > 0.

Note if k is equal to 16 it will have duplicate roots ( both equal to 4).

4k < 64

k < 16  (answer).

answer: 19 is   2

step-by-step explanation: i just looked at your answer and wrote it down

(a) the volume of the cone is 20/3 in3

hence, option a is correct.