Question

determining the level of precision
what number could be added to 0.40 ml for the level of precision to be 0.01 ml? check all that apply
0.2 ml
0.154 ml
8 ml
2.02 ml
8.8331 ml

Explanation:

Step1: Understand precision concept

Precision of 0.01 mL means the result should be accurate to the hundred - ths place.

Step2: Analyze each option

When adding a number to 0.40 mL, we check the decimal places of the added number.

• For 0.2 mL (0.20 mL in hundred - ths place form), when added to 0.40 mL, the result is 0.60 mL, which has a precision of 0.01 mL.
• For 0.154 mL, when added to 0.40 mL, the result is 0.554 mL which has a precision of 0.001 mL.
• For 8 mL (8.00 mL in hundred - ths place form), when added to 0.40 mL, the result is 8.40 mL, which has a precision of 0.01 mL.
• For 2.02 mL, when added to 0.40 mL, the result is 2.42 mL, which has a precision of 0.01 mL.
• For 8.8331 mL, when added to 0.40 mL, the result is 9.2331 mL which has a precision of 0.0001 mL.

Answer:

0.2 mL, 8 mL, 2.02 mL