PERGUNTA 1 Considere os conjuntos A{1, 3, 5, 7} e B{a, e, i, o) e a função fA --> B.
Assinale a função que é Bijetora:
a. f1 = {(1, a), (3, e), (5, i), (7,0)}.
O b. f2 = {(1, a) (3, a), (5, a), (7. a)}.
O c. f3 = {(1, a) (3, b), (5, a), (7, 0)}.
O d. f4 = {(1, a) (3, b), (5, a), (7, a)}.
O e. f2 = {(1, a) (3, e), (5, a), (Z, e)}.

Type the correct answer in the box. use numerals instead of words. if necessary, use / for the fraction bar. a city water tank holds 20 gallons of water. a technician empties 25% of the tank. how many more gallons of water must be removed from thetank so that it has 5 of the water that it started with: the technician must removemore gallons of water for the tank to have 5 of the water that it started with.