Answer:

Step-by-step explanation:
21 trillion =
21,000,000,000,000 =
21 followed by 12 zeros =

Answer:
0.24930286...
Step-by-step explanation:
Answer: C. y + 4 = 1/2(x - 1)
Step-by-step explanation:
point slope form is y - y1 = m(x - x1) where m is the slope and (x1, y1) is a point on the line.