Answer:
6 knots
Step-by-step explanation:
Let the velocity be v knots
thus, the time required to traverse 500 M is given by 500 / v hours
Fuel consumption per hour is equal to 216 plus half the cube of the speed (v^3).
Let F denote the fuel consumption for the journey
= [500/v][216 + 0.5v^3]
= 500[216/v + 0.5v^2]
The derivative of F with respect to v is: dF/dv = 500[ - 216/v^2 + v]
The second derivative, d^2F/d^2v = 500[432/v^3 + 1], indicates positivity.
Setting dF/dv to zero helps find the minimum.
500[ -216/v^2 + v] = 0
or v = 216/v^2
or v^3 = 216
By solving, we arrive at v = [216]^(1/3) = 6 knots
The equation Y - (-8) = -6 (x-2) is accurate, but the rest are not.
This simplifies to y + 8 = -6x + 12.
Then, applying the subtraction of 8 yields y = -6x + 4, which is the correct slope-intercept form.
Response:
B. 255 m
Detailed breakdown:
utilize similar triangles
L / 60 = 85 / 20
L = (85 * 60) / 20
L = 255 m
When rounding 243.875: to the nearest tenth, it becomes 243.9; to the nearest hundredth, it is 243.88; to the nearest ten, it rounds down to 240; and to the nearest hundred, it rounds down to 200. The general rule in rounding states that if the decimal is less than 5, the number remains the same; if it is 5 or more, you round up.
Answer:
C. 4x^3 - 14x^2y + 14xy^2 - 4y^3
Step-by-step explanation:
Given:
Multiplication of 2x^2 – 3xy + y^2 and 2x – 4y
Multiplication refers to the product
(2x^2 – 3xy + y^2) (2x – 4y)
Expand the brackets
= 4x^3 - 8x^2y - 6x^2y + 12xy^2 + 2xy^2 - 4y^3
Combine like terms
= 4x^3 - 14x^2y + 14xy^2 - 4y^3
The result is
C. 4x^3 - 14x^2y + 14xy^2 - 4y^3