Estimate the sum by rounding each number to the nearest hundred first

What is the equation of the graph below? y=sec(x)-4

If f(x)= 3x+6 which of the following is the inverse of f(x)

Asquare has a side that measures 11 units. what is the area of a circle with a circumference that equals the perimeter of the square? use 3.14 for π, and round your answer to the nearest hundredth. 1519.76 units2 379.94 units2 616.56 units2 154.14 units2