For the graph below, what should the domain be so that the function is at least 300?

a.) x≥0
b.) -5≤x≤30
c.) 0≤x≤25
d.) all real numbers

Option C. 0≤x≤25

Step-by-step explanation:

we know that

The function f(x) of the graph is a vertical parabola open down

If the function is at least 300

then

The solution is the shaded area above the solid line f(x)=300

In the graph plot f(x)=300 and find the value of x

The values of x are

see the attached figure

therefore

The interval is ------> [0,25]

All real numbers greater than or equal to zero and less than or equal to 25

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step-by-step explanation:

the answer is ! ?