Answer:
the answer is B
Zero real roots:
f(x) = x^2-x+1
f(x) = x^2+2x+3
One real root:
Two real roots:
f(x)=x^2+2x+1
f(x)=x^2-3x+2
Step-by-step explanation:
These were determined by using the quadratic formula.
300t = 350(t-1)
300t = 350t-350
-50t=-350
t = -350 /-50
t = 7 hours
