What is the correct scientific notation form for 106.3?

What is the common difference in the following arithmetic sequence? 7,3,-1,-5

What is the order of operations for 2 + (3 - 9) ÷ -3 · 4 in number order 1. subtraction 2. division 3. addition 4. multiplication

Which of these numbers of simulations of an event would be most likely to produce results that are closest to those predicted by probability theory? 15, 20, 5, 10