For this case we have that by definition, an equation of the second degree is given by:
[tex]ax ^ 2 + bx + c = 0[/tex]
We have the following equation:
[tex]0.3x ^ 2 + 5x-7 = 0[/tex]
Then, according to the definition above, we have to:
[tex]a = 0.3\\b = 5\\c = -7[/tex]
Thus, b equals 5.
Answer:
[tex]b = 5[/tex]
Option C
