Helena foi a feira com certa quantia. Gastou metade dessa quantia na banca de frutas e um terço dessa quantia na banca de verduras e legumes. Que fração da quantia inicial, sobrou para Helena?
1 ponto
a) cinco sextos
b) um sexto
c) um meio
d) três quintos

Given this information, which expression must represent the value of b?

Apackage of bacon holds 15 strips of bacon. the pancake house uses 17 packages of bacon in the morning and 21 packages in the afternoon. how many more strips were used in the afternoon than the morning?

2people are trying different phones to see which one has the better talk time. chatlong has an average of 18 hours with a standard deviation of 2 hours and talk-a-lot has an average of 20 hours with a standard deviation of 3. the two people who tested their phones both got 20 hours of use on their phones. for the z-scores i got 1 for the chatlong company and 0 for talk-a-lot. what is the percentile for each z-score?