Please its really urgent, step by step working out

What is the celsius temperature that is equal to 94 degrees fahrenheit using the formula f=9/5 c+32

What is 20+(5 x 2/5 )+ 3 show your work

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