# Solid Mensuration: Prismatoid

## New forum topics

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- Make the curve y=ax³+bx²+cx+d have a critical point at (0,-2) and also be a tangent to the line 3x+y+3=0 at (-1,0).
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- Minima Maxima: y=ax³+bx²+cx+d

## $A_1 = 8 \times 7 = 56 ~

$A_1 = 8 \times 7 = 56 ~ \text{ft}^2$

$A_2 = 14 \times 11 = 154 ~ \text{ft}^2$

$A_m = \dfrac{8 + 14}{2} \times \dfrac{7 + 11}{2} = 99 ~ \text{ft}^2$

$L = 12 ~ \text{ft}$

$V = \frac{1}{6}L(A_1 + 4A_m + A_2)$