Find the distance between the points (8,9) and (0,4). Write your answer as a whole number or a fully simplified radical expression. Do not round.

___ units

If y varies directly as x2 and y=6 when x=6, find the constant of variation.

Acircle has a circumference of 7.850 units. what is its radius?

He ! a group of farmers planned to clean 80 acres of wheat per day to finish the work on schedule. right before the work started, they received a new piece of machinery that them clean 10 more acres per day than originally planned. as a result of increased productivity in the last day before the deadline they only had to clean 30 acres. how many acres of wheat did the group of farmers have to clean?