Determinare un punto \( D \) dello spazio complanare con \( A(2,1,-4), B(4,1,0), C(1,1,4) \) Answer \( \begin{array}{ll}\text { a. } D(1,-1,-1) \\ \text { b. } D(3,1,0) \\ \text { c. } D(-2,-1,0) \\ \text { Clear my choice }\end{array} \) \( \begin{array}{ll}\text { b }\end{array} \)

\begin{tabular}{l}6.2 A cylinder has a radius of 7 cm and height of 10 cm . \\ C.2.1 Calculate the volume of the cylinder. (if \( \pi=3,14 \) ) \\ \hline\end{tabular}

Defina o que é o raio de um círculo e como ele se relaciona com o diâmetro.

\begin{tabular}{l} 6.2. A cylinder has a radius of 7 cm and height of 10 cm . \\ \( \square \) \\ \hline \( .2 .1 \quad \) Calculate the volume of the cylinder. (if \( \pi=3,14 \) ) \end{tabular}

We desea eartriif una cala sin lapa y que almacene dial mayor volumen. para ello se dispone de una lamina d carton con las siguientes medidas. \[ 10 \mathrm{~cm} \times 9 \mathrm{~cm} \]

a. Points A and B are 1.5 units apart. (Type an integer, fraction, or mixed number.) b. Give the coordinates of one point that is 4 units from point \( C \) in the x-direction. \( \square \) (Type an ordered pair.)