Required information NOTE: This is a multi-part question. Once an answer is submitted, you will be unable to return to this part. A toypowered tractor pushes a book across a table to the right. Which of the following is the correct free-body diagram for the book?

Find the product. \( \left.\begin{array}{ll}4 & -5\end{array}\right]\left[\begin{array}{c}-2 \\ -1\end{array}\right] \) Select the correct choice below and, if necessary, fill in the answer box to complete your choice. A. \( \square \) (Simplify your answer.) B. The matrix product is not defined.

\( 2.6 .2 x - \frac { x - 1 } { 2 } = 3 \)

Iett torgstand ligger en melon som văger 1 kg . Under solen torkar den tills den förlorat halva sin vikt. En färsk melon har en vattenhalt pá \( 90 \% \). Hur stor ăr vatrenhalten nu?

70 Un ragazzo ha legato il suo zaino di \( 5,0 \mathrm{~kg} \) con una fune lunga \( 1,25 \mathrm{~m} \) e lo fa ruotare. Sapendo che esercita una forza centripeta di 64 N , a quale velocità sta ruo- tando? \( [4,0 \mathrm{~m} / \mathrm{s}] \)

64. ¿Cuántos electrones, protones y neutrones tiene cada uno de los siguientes átomos? \( \begin{array}{ll}\text { a. }{ }_{55}^{132} \mathrm{Cs} & \text { c. }{ }^{163} \mathrm{Tm} \\ \text { b. }{ }_{29}^{59} \mathrm{Co} & \text { d. }{ }_{30} 30 \mathrm{Zn}\end{array} \)