What 1+1 im serious but yeah just got

Select all the correct answers. what is 221,000,000,000,000,000,000 expressed in scientific notation?

Solve for b. ab + c= d b= a + old ob=allc-ch b= (d-c/a

Nour and rana are shopping for a christmas tree. they are deciding between 2 22 different types of trees (real and fake) and 4 44 colors for the ornaments (white, silver, gold, and purple). they each created a display to represent the sample space of randomly picking a type of tree and a color for the ornaments. whose display correctly represents the sample space?