A piece of lead for a mechanical pencil is 3.15 × 10–4 meter in diameter. What is the diameter of the lead in standard notation?
A.
31,500,000 meters

B.
3,150 meters

C.
0.000315 meter

D.
0.0000315 meter

Tom is making a punch that contains 80% cranberry juice and the rest ginger ale. the punch has 2 liters of ginger ale. part a: write an equation using one variable that can be used to find the total number of liters of cranberry juice and ginger ale in the punch. define the variable used in the equation and solve the equation. hint: 0.8x represents the number of liters of cranberry juice in the punch. (5 points) part b: how many liters of cranberry juice are present in the punch? show your work.

Which equation matches the graph shown ?

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form