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MrSnuffleBuns4277
01.03.2021 •
Mathematics
Match the expression with its name. 9X4 - 3x + 4
A. cubic binomial
B. quadratic monomial
C. not a polynomial
D. fourth-degree trinomial
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Ответ:
Ответ:
Find the maximum height by solving for when the derivative of f(x) = 0 and the sign changes from positive to negative:
f(x) = -16x² + 2x + 48
Find the derivative of each term:
f'(x) = -32x + 2
Set the equation equal to 0:
0 = -32x + 2
-2 = -32x
x = 1/16 sec
Validate that the derivative changes from + to - at this value by plugging in values into the derivative formula on both sides of 1/16:
f'(0) = 2, +
f'(2) = -62, -
Therefore, there is a maximum at x = 1/16 because the function changes from positive to negative. Find the height at x = 16 seconds. (Plug it into the original equation)
f(1/16) = -16(1/16)² + 2(1/16) + 48
f(1/16) = -1/16 + 2/16 + 48
f(1/16) = 1/16 + 48
f(1/16) = 48 1/16 or 48.0625 ft
Round to nearest hundredth: ≈48.06 feet.