.- La madre de Juan lo envía a la panadería a comprar 500 gramos de pan. ¿Qué instrumento considera usted que debe utilizar el panadero para entregarle a Juan
la cantidad exacta de pan que su madre le envió a comprar?

sup bro, im dumb, but this is what i found xd

"the ozone layer acts as a filter for the shorter wavelength and highly hazardous ultraviolet radiation (uvr) from the sun, protecting life on earth from its potentially harmful effects. when the sky is clear, there is an inverse relationship between stratospheric ozone and solar uvr measured at the earth's surface"