2) The area of a circle varies directly as the square of its circumference. What is the constant of variation

What is the answer in 5x8 i need you ​

Mr.rivera and the boys spent php 725.50 for food and php 125.25 for transportation during the science fair camp if they had php 1000.00 to spend how much money was left? what is asked in the problem what are the given facts? what is the process to be used? write the mathematical sentence? write the complete answer?

Azookeeper has enough feed for 85 birds for 20 days. if 17 birds flew away and did not return, how long will the feeds last?