6. From 1 litre of cool drink you can fill \( 4 \frac{1}{2} \) glasses. How many litres of cool drink do you need if you want to pour one glass of cool drink for each of your 18 friends?

1. ENCONTRAR EL PERIMETRO DE UN TERRENO IRREGULAR, QUE TLENE LAS SIGUIENTES ME DIOAS: 400 M 80OM, 500 M Y 50 m . (HACER OPERACIONES)

Beweise, dass wenn \( \overline{A B} \) der Durchmesser des Umkreises des Dreiecks \( \Delta_{A B C} \) ist, dann gilt \( \varangle A C B=90^{\circ} \).

Suppose a large shipment of microwave ovens contained \( 14 \% \) defectives. If a sample of size 278 is selected, what is the probability that the sample proportion will differ from the population proportion by less than \( 5 \% \) ? Round your answer to four decimal places.

Radon-222 decays at a continuous rate of \( 17.3 \% \) per day. How much will 130 mg of Radon- 222 decay to in 4 days? NOTE: Round your answer to 4 decimal places.

3- \( \frac{3}{5} a-\frac{1}{6} b+\frac{2}{5} c \) por \( -\frac{5}{3} a c^{2}= \)