Agate is made up of a rectangle and a semicircle as shown. find the area of the gate

Ricardo ran the 400 meter race 3 times his fastest time was 54.3 seconds his slowest time was 56.1 seconds if his average time was 55.0 seconds what was his time for the third race

What is 32+4 x (16 x 1/2) -2 show your work}

Find the multiplicative inverse of 8-12i