11. State the temperature shown on the thermometer in the form: measurement \( \pm \) uncertainty 12. The uncertainty for the speedometer of a vehicle is \( 5 \% \) of the speedometer's reading. Calculate the minimum speed a vehicle could be travelling if its speedometer reads 60

What is \(\frac { 4} { 20} \) simplified?

5. Escribir \( >,<0= \) según corresponda: \( \begin{array}{llllll}\text { a. }-8 & 40 & \text { b. } 8 & -3 & \text { c. }-2 & -12 \\ \text { 6. Realizar las siguientes operaciones: } & & \text { d. } 100 & -1000\end{array} \) \( \begin{array}{llllll}\text { a. } 512+22 & \text { b. } 150-25 & \text { C. }(-300)+(-976) & \text { d. }(-80)+(-120) & \text { e. }(-48)+9 & \text { f. }(-98)+27 \\ \text { g. }(-83)+29 & \text { h. }(-20)+(+20) & \text { i. } 7+5+(-4)+(-24) & \text { j. }(-32)+23+(-11) & \text { k. } 12+(-4)+(-10)+(-9)\end{array} \)

A store sells 2.75 liters of juice in one bottle and 1.25 liters in another. How many liters of juice do you have altogether?

Calcola il valore dell'espressione. \( \left(\frac{1}{7}+\frac{2}{3}\right)-\left[\frac{1}{6}+\left(\frac{2}{3}-\frac{2}{4}\right)-\left(\frac{1}{6}+\frac{2}{4}\right)\right]+\frac{2}{7}-\frac{3}{2}+\left(\frac{1}{21}+\frac{3}{2}\right. \)

3 A rectangular block has a volume of \( 40 \mathrm{dm}^{3} \). The base area is \( 20 \mathrm{dm}^{2} \). How tall is the rectangle?