The diameter of a circle is 86 kilometers. What is the circle's area? use 3.14 for pi or 22/7
Please help me lol

Noor brought 21 sheets of stickers. she gave 1/3 of a sheet to each of the 45 students at recess. she wants to give teachers 1 1/2 sheets each.

Which of the following vectors are orthogonal to (2,1)? check all that apply

Need plz been trying to do it for a long time and still haven’t succeeded