Select the correct answer.
the area (a) of a circle is a function of its radius (r) and is given by the function a = f(r) = πr2. what is the domain of this function?
a.
all positive real numbers
b.
all real numbers
c.
all positive real numbers including 0
d.
all real numbers excluding fraction

Describe all the numbers that when rounded to the nearest thousand are 645,000

Afarmer has a large field that is x feet in length. he wants to fence in a rectangular section in the middle of the field , leaving a length of 100 feet of open field behind each end of the fenced rectangle.he also wants the width of the fenced-in space to be 100 feet less than its length. find the expressions to represent the length and width of the fenced section of the field

Set up and solve a proportion for the following application problem. if 55 pounds of grass seed cover 404 square feet, how many pounds are needed for 7272 square feet?