13) A fresh juice stand in Montreal sells a large glass of orange juice for 4.50 Canadian dollars. If you buy 4 glasses, how much have you spent in (U.S.) dollars? 14) Recently, one U.S. dollar was worth about 12.73 Mexican pesos. How much would 235 U.S. dollars be worth in Mexican pesos? 15) Assume that you breathe once every 10 seconds. How many breaths do you take in 3 weeks?

Una espira de radio \( \mathrm{R}=5 \mathrm{~cm} \) por la que circula una corriente eléctrica en sentido horario de 30 a se encuentra situada en el plano de la pantalla. ¿Cuál es el campo magnético en el centro de la espira? ¿Que cara de la espira estariamos viendo?

Find the perimeter and area of the figure. 9) A rectangle with a length of 2 yards and a width of 9 yards

(1 point) Solve the equation involving absolute value. If there is more than one answer, en list. If there is no solution enter DNE. \( |x-5|=0 \). \( x=\square \) help (numbers)

Fill in the blanks of the table that shows logarithmic growth base 6 . -

15. Calcular las derivadas de las funciones dadas a continuación usando derivación logarítmica: \( \begin{array}{ll}\text { (a) } f(x)=(\operatorname{sen} x)^{x} & \text { (d) } f(x)=3^{\operatorname{sen}(3 x)} \\ \text { (b) } f(x)=\left(x^{3}-7\right)^{x^{2}+6} & \text { (e) } f(x)=(3 x)^{e^{x}} \\ \text { (c) } f(x)=(\cos x)^{\operatorname{ten} x} & \text { (f) } f(x)=x^{x^{x}}\end{array} \)