By how many ways a number can you find from the digits 3,4,5,6,7,8,9? pls someone help me solve these :')​

Are carpet coast $15 per square metre. the total delivery charge is $21 peter buys n squared metres of carpet what is the expression which represents the total cost in $

Data was collected on myrtle beach for 11 consecutive days. each day the temperature and number of visitors was noted. the scatter plot below represents this data. how many people visited the beach when the temperature was 84 degrees?

What is the upper quartile in the box plot?