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Mathematics 9 Online
Aliciaa:

help again pls

Aliciaa:

Aliciaa:

Aliciaa:

@toga

toga:

To find the volume V of the pyramid, we can use the formula: V = (1/3)Bh We know that the height h of the pyramid is 10 meters. Substituting the given value of h, we get: V = (1/3)B(10) Substituting the value of B from the given equation B = x² - 4x - 12, we get: V = (1/3)(x² - 4x - 12)(10) Multiplying and simplifying, we get: V = (10/3)x² - (40/3)x - 40 Therefore, the polynomial equation that represents the volume of the pyramid V with height 10 meters is: V = (10/3)x² - (40/3)x - 40

Aliciaa:

wht abt the part b

Aliciaa:

nvm I got it ty

toga:

@aliciaa wrote:
nvm I got it ty
To find the volume of the pyramid when x = 12 m, we can use the polynomial equation for V that we derived earlier: V = (10/3)x² - (40/3)x - 40 Substituting x = 12 into this equation, we get: V = (10/3)(12)² - (40/3)(12) - 40 Simplifying, we get: V = (10/3)(144) - (480/3) - 40 V = 480 - 160 - 40 V = 280 Therefore, the volume of the pyramid is 280 cubic meters when x = 12 m.

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