Question

What is the proper number of significant figures, round properly, and use scientific notation where appropriate for the expression (82.5) + (1.902) div 0.00050 ?

a) (8.4 x 10⁴)
b) (8.40 x 10⁴)
c) (8.395 x 10⁴)
d) (8.396 x 10⁴)

Answer 1

To determine the proper number of significant figures and round the expression (82.5) + (1.902) ÷ 0.00050.

Step-by-step explanation:

To determine the proper number of significant figures and round the expression (82.5) + (1.902) ÷ 0.00050, we need to perform the calculations step by step:

First, perform the division: (1.902) ÷ 0.00050 = 3804.

Next, add 82.5 + 3804 = 3886.5.

Lastly, round the result to the appropriate number of significant figures: 3886.5 rounded to 3 significant figures is 3890.

Therefore, the expression (82.5) + (1.902) ÷ 0.00050 equals (8.39 x 10^4). The correct answer is option C.