Carolyn is building a pen for her dog. the perimeter of the pen is 52 ft
a) explain how you can use a proportion to convert the perimeter into yards and feet.
b) the fencing material is sold by the yard. it costs 10.99 per yard. what is the cost of material before taxes

What is the range for 31,39,29,34,37,24,36,33,34,28

What is the expression in factored form? -20x^2 - 12x a. 4x(5x+3) b. -4x(5x-3) c. -4(5x+3) d. -4x(5x+3)

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.