Alottery offers two options for the prize. option a: $1000 a week for life. option b: $600 000 in one lump sum. which option would the winner choose if s/he expects to live for another 50 years?

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Se tiene en una caja de canicas 10, 4 blancas y 6 negras ¿cual es la probabilidad que en 2 extracciones con reemplazo sean blancas? ¿cual es la probalidad que en 2 extracciones sin reemplazo sean negras?

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.