Donald buy some fabric to make place mats. she needs 1/5 yard of each type of fabric. she has nine different types of fabric to make her design. use the following equation. write the number in the line to make the statement true.

Acircle has a circumference of 28.36 units what is the diameter of the circle

Ascientist wants to use a model to present the results of his detailed scientific investigation. why would a model be useful? a )because the model makes the concepts easier to understand b) because the model is easy to put together and to use c) because the model prevents other scientists from asking questions d) because the model requires the audience to pay full attention to it i don't know what to choose because between a and d a is much more likely than d because it only wants to get the attention of the audience. i'm confuse.

*let m∠cob = 50°30’, m∠aob = 70° and m∠aoc = 20°30’. could point c be in the interior of ∠aob? why?