La vida media de un isótopo radiactivo es el tiempo que le toma a una cantidad cualquiera del isótopo reducirse a la mitad de su masa inicial. si comenzamos con gramos de un isótopo radiactivo, ¿cuánto quedará después de vidas medias? utilizar la calculadora proporcionada y redondear la respuesta al gramo más cercano.

Carlos y yo somos de canada a. somos canadieses b. eres canadiese c. son canadieses

When traveling in the spanish-speaking countries, it's very important to be able to understand directions in spanish, so that you can find out how to get from place to place. but what happens if you need to give a friend directions? would you be prepared? in this project you'll practice giving directions to places in panama city.

Question 11 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. tú estudias answer for blank 1: question 12 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. raúl estudia answer for blank 1: question 13 (fill-in-the-blank worth 1 points) change this verb from the present tense to the preterite tense. nosotros pagamos answer for blank 1: question 14 (fill-in-the-blank worth 1 points) fill the blank with the preterite tense of the verb in parentheses. usted a la tienda por teléfono. (llamar) answer for blank 1: question 15 (fill-in-the-blank worth 1 points) fill the blank with the preterite tense of the verb in parentheses. lolita pablo en la fiesta anoche. (hablar) answer for blank 1: