Find the length of side cif a = 3 m and b = 7 m

What is the best approximation for the area of a circle with a radius of 4 m ? use 3.14 to approximate pi

Worth 100 points need the answers asap first row -x^2 2x^2 (x/2)^2 x^2 x is less than 2 x is greater than 2 x is less than or equal to 2 x is greater than or equal to 2 second row -5 -5/2 4 5 •2 is less than x& x is less than 4 •2 is less than or equal to x & x is less than or equal to 4 •2 is less than or equal to x& x is less than 4 •2 is less than x& x is less than or equal to 4

What are two numbers that add up to -9 and multiply to -10 best answer gets branliest and 100 extra points