Each of the numbers in the following calculation represents a quantity measured by a student in the laboratory.
P =
After performing the calculation,the student's calculator appeared as shown below:
To the correct number of significant figures what is the value of P?
A)2
B)2)43
C)2)430
D)2)430094

Question

Each of the numbers in the following calculation represents a quantity measured by a student in the laboratory.
P = 
After performing the calculation,the student's calculator appeared as shown below:
To the correct number of significant figures what is the value of P? 
A)2 
B)2)43 
C)2)430 
D)2)430094

Quizplus · Accepted Answer

Based on the values given, we can see that the only change in the calculation result occurred in the digit immediately after the decimal point. Therefore, we can assume that the value of P should be rounded to two decimal places. The digit in the third decimal place is 5 or greater, so the second decimal place should be rounded up. This means that the correct value for P is 2.43. The best choice among the given options is therefore C: 2)430, which represents 2.43 rounded to two decimal places.

Each of the Numbers in the Following Calculation Represents a Quantity