Date le rette \( r:\left\{\begin{array}{l}3 x+y+z=4 \\ x-y+2 z=-1\end{array}\right. \) s: \( \left\{\begin{array}{l}x=t-1 \\ y=2 t+1 \text { dire se: } \\ z=-t+2\end{array}\right. \) Answer a. sono incidenti b. sono sghembe c. sono parallele

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. (Type an ordered pair.)

\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}

(Unit-AL) Uma célula esférica se dividiu em duas, preservando o volume total. Usando-se \( \sqrt[3]{2} \cong 1,26 \), se preciso, é correto estimar que o raio de cada uma das novas células será, em comparação com o da célula original, cerca de A. \( 20 \% \) menor. B. \( 30 \% \) menor. C. \( 40 \% \) menor. D. \( 50 \% \) menor. E. \( 60 \% \) menor.

The coordinates of triangle ABC are \( \mathrm{A}\left(-4 \frac{1}{2},-2 \frac{1}{2}\right), \mathrm{B}\left(-4 \frac{1}{2},-1\right) \), and \( \mathrm{C}(6,-1) \). a. What is the distance between points A and B ? b. Give the coordinates for two points that are 4 units from point C . a. Points A and B are \( \square \) units apart. (Type an integer, fraction, or mixed number.)

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. \[ 10 \mathrm{~cm} \times 9 \mathrm{~cm} \]