The formula for the circumference of a circle is 4072-01-01-03-00_files/i0150000.jpg . determine the circumference when the radius r is 10 cm.

Jack has a piece of red ribbon that is two times as long as his piece of blue ribbon. he says that he can use two different equation to find out how long his piece of red ribbon is compared to his piece of blue ribbon is. is he correct? explain his reasoning

Determine if the equation defines y as a function of x: 2xy = 1. yes o no

In trapezoid abcd, ac is a diagonal and ∠abc≅∠acd. find ac if the lengths of the bases bc and ad are 12m and 27m respectively.