The heights of a group of professional basketball players are summarized in the frequency distribution below. Find the standard deviation.
Height in inches Frequency
70-71 3 72-73 7 74-75 16 76-77 12 78-79 10 80-81 4 82-83 1

Mr and mrs smith buy tickets for themselves and their four children. the cost of an adult ticket is ? 6 more than the adult ticket. the total cost of the six tickets is ? 40.50 work out the cost of an adult ticket. in your working let c be the cost of the child ticket and a be the cost of the adult ticket.

In the equation sqrt(n+5)-sqrt(11-10)=1. what is the value of n

Long division setup showing an incomplete calculation. 12 is in the divisor, 6839 is in the dividend, and 5 hundreds and 6 tens is written in the quotient. 6000 is subtracted from 6839 to give 839. an unknown value represented by a box is being subtracted from 839. what number should be placed in the box to complete the division calculation?