Na calculadora, apertei algumas teclas. Depois, pressionei tres vezes a tecla =, e apareceu a sequência:

420

a-) Quais teclas apertei inicialmente?

b-) Se eu apertar mais três vezes a tecla =, que números aparecerão?

Mozart lenses inc. recently introduced seelites, a thinner lens for eyelasses. of a sample of 800 eyeglass wearers, 246 said they would purchases their next pair of eyeglasses with the new lenses. lenses inc. estimates that the number of people who purchase eyeglasses in a year is 1,700,000. most eyeglasses wearer buy one new pair of eyeglasses a year. what is the annual sales potential for the new lenses.

Which equation represents the function on the graph?

In a class, there are 12 girls. if the ratio of boys to girls is 5: 4 how many boys are there in the class