Help pls this is my first question on here and I need help with this pls. I will give you the brainliest and a thanks :)))

Circumference = pi x diameter

Pi = 3.142

Answer for Q1 = 18.852

6 x 3.142 = 18.852

Answer for Q4 = 25.136

As it gives the radius, you gotta double the radius to get the diameter of the circle

8 x 3.142 = 25.136

Hope this helps :]

< i think this is the answer unless i did my math wrong

20y5 times 2 is 1010 times -2 is -20, plus y