Answer:
Correct answer: x = 50 seconds
Step-by-step explanation:
The given function g(x) = (1/20) · x · (x - 100) is actually quadratic function:
g(x) = (1/20) · x² - 5 · x or parabola
The standard form of a quadratic function is:
y = ax² + bx + c
For which x is the minimum of the parabola we can find with this formula:
x = - b / 2 a
in this case a = 1/20 and b = - 5
x = -(-5) / 2 ·(1 / 20) = 5 / (1 / 10) = 5 · 10 = 50 seconds
x = 50 seconds
God with you!!!
