Forty five children attend a preschool. the number of two year olds is one half of the number of three year old's. the number of four year olds is the same number as the number of three year old's. how many two year old's are there? how many three year old's are there? how many four year old's are there?

Given a circle with a radius of 2 which is the length of an arc measuring 75

Which of the following is a proper fraction? a. 9⁄8 b. 5⁄6 c. 7⁄3 d. 4⁄2

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