Fill in the missing percent, decimal, and/or fraction for each of the following (in the attachment)

What is the number 321,000,000 in scientific notation? also what is the number? ?

Which of the following equations are equivalent to -2m - 5m - 8 = 3 + (-7) + m? -15m = -4m -7m - 8 = m - 4 -3m - 8 = 4 - m m - 4 = -7m - 8 -8 - 7m = -4 + m -8 - 3m = 4 - m

What rotation was applied to triangle def to create d’e’f’?