How far apart would Mars and Jupiter be if they were on opposite sides of the sun

Kelly is three years younger than her sister. the sum of their ages is 34 years. how old is kelly and how old is her sister?

What is the size of the matrix resulting from

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