For a science experiment, Mr. Duncan mixed 0.00055 pounds of sulfur and 0.00104 pounds of iron powder in a test tube before heating it. What is the total weight of the mixture in the test tube?
A.
6.54 × 10-4 pounds
B.
6.54 × 103 pounds
C.
1.59 × 10-4 pounds
D.
1.59 × 10-3 pounds
C. 1.59 × 10-4 pounds
To find the total weight of the mixture, you would simply add the weights of the sulfur and iron powder together:
0.00055 pounds (sulfur) + 0.00104 pounds (iron powder) = 0.00159 pounds
Converting this to scientific notation gives 1.59 × 10-4 pounds.