The range of a set of data is 122 and the minimum value is 87. To display this data in a histogram, Nat chose intervals of 20 starting with 80–99.
How many intervals will her histogram have?
answers
a. 10
b. 9
c. 7
d. 8

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

We just started the introduction into circles and i have no idea how to do this.

42. if 20 men can eat 200 kg of wheat in 40 days, then 10 men can eat 300 kg of wheat in how many days? a) 120 days b) 60 days c) 80 days d) none of these