The surface area of a cone is 25.6π in2 and the slant height is 2.4 in. what is the radius of the cone?
a. 2 in.
b. 1.2 in.
c. 4 in.
d. 5 in.

Multiply −2x(6x^4−7x^2+x−5) express the answer in standard form. enter your answer in the box.

3382-299=3383- ? fill in the blank?

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0