de 72 lanzamiento de penales, Cristiano Ronaldo falló en 10, mientras que Lionel Messi falló en 10, pero de 56 penales. ¿Quién tiene mayor efectividad en los tiros penales? ¿Porqué?

Lance lived in portugal and brazil for a total of 14 months to learn portuguese. he learned an average of 130 new words per month when he lived in portugal, and an average of 150 new words per month when he lived in brazil. in total he learned 1920 new words. write a system of equations to represent the situation. use x to represent portugal, and y to represent brazil

The first-serve percentage of a tennis player in a match is normally distributed with a standard deviation of 4.3%. if a sample of 15 random matches of the player is taken, the mean first-serve percentage is found to be 26.4%. what is the margin of error of the sample mean? a. 0.086% b. 0.533% c. 1.11% d. 2.22%

P= price tax is 4% added to the price. which expression shows the total price including tax?