Answer:
D
Step-by-step explanation:
R(x) = -x^2+122x+400
C = sqrt(e/m)
You can get this by first dividing away the m and then taking the square root of both sides.
The solution to the given equation is x = ±7. The correct option is d. x = ±7
<h3>Solving quadratic equations </h3>
From the question, we are to determine the solution to the given equation
The given equation is
x²-49 = 0
NOTE: I assumed the variable is x
Solving the equation
x²-49 = 0
Writing in the form ax²= c
x² = 49
∴ x = ±√49
x = ±7
Hence, the solution to the given equation is x = ±7
Learn more on Solving quadratic equations here: brainly.com/question/24334139
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8x40=320 (+) 8x7=56 (=) 376.
A=40
hope this helped
D. 1mm/10cm is the correct answer choice.
