Which of the following is closest to the area of the shaded region below?

What is the axis of symmetry of the function f(x)=-(x+ 9)(x-21)

The customer price index(cpi), which measures the cost of a typical package of customer goods,was 208.8 in 2011 and 244.1 in 2016.let x=11 corresponding to the year 2011 an estimate to cpi into 2013 and 2014. assume that the data can be modeled by a straight line and the trend to continue idenfinitely.use data points to find such a line and then estimate the requested quantities

If the perimeter of the garden is 37 ft. the width is x and the length is 15 ft. what is the width of the garden in feet?