El banco de la república de Colombia, en un año imprime billetes nuevos. El año pasado reporto las siguientes
impresiones:
263.600.000 billetes de $1000
182.700.000 billetes de $1000
91.700.000 billetes de $5000
135.000.000 billetes de $10.000
161.000.000 billetes de $20.000
Expresarlas en notación científica​

Determine the mean and variance of the random variable with the following probability mass function. f(x)=( 729divided by 91) (1 divided by 9) superscript x baseline comma x equals 1,2,3 round your answers to three decimal places (e.g. 98.765).

Answer asap ill give ! ’ a sample of radioactive material decays over time. the number of grams, y , of the material remaining x days after the sample is discovered is given by the equation y = 10(0.5)^x. what does the number 10 represents in the equation? a. the half-life of the radioactive material, in days b. the amount of the sample, in grams, that decays each day c. the time, in days, it will take for the samples to decay completely d. the size of the sample, in grams, at the time the material was discovered

Is a square always, sometimes, or never a parallelogram