Answer:
A. F(x)=x^2
Step-by-step explanation:
Quadratic function is the function which has degree two
Degree is the highest power of a polynomial
In option B we have |x| in which degree is one hence, discarded
In option C we have in which degree is three hence, discarded
In option D we have x which is a linear function being of degree one. Hence, discarded.
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Subtract 30, then factor the equation.
... x² = 30
... x² - 30 = 0
... (x -√30)(x +√30) = 0
By the zero product rule, the solutions are values of x that make a factor be zero.
... x - √30 = 0 . . . . the first factor is zero
... x = √30
... x + √30 = 0 . . . . the second factor is zero
... x = -√30
The solutions are . . .
... x = ±√30 . . . . . matches your 3rd choice
Final Answer: 
Steps/Reasons/Explanation:
Question: Solve for 
. 
. = ?
<u>Step 1</u>: Divide both sides by 
.
<u>Step 2</u>: Simplify 
to 
.
~I hope I helped you :)~
It should be 78.54.
Double check that.
Formula: V=πr2h/3
r2 is R squared
