Isaid 1000 divvied by 440 is 2.12 i got this wrong. i have to correct for homework. what did i do wrong and how can i solve it right?

The weights of players in a basketball league are distributed normally. the distance (d) of each player's weight (w) from the mean of 86 kilograms was computed as follows: d = |w - 86| if d is greater than 7 for approximately 5% of the players, what is the approximate standard deviation of the players' weights? a. 1.75 kilograms b. 3.5 kilograms c. 4.3 kilograms d. 7 kilograms

If 10 men take 18 days to mow 60 acres of grass, how long will 15 men take to mow 80 acres?

1mile equals approximately 1.6 kilometers. which best approximates the number of miles in 6 kilometers?