Question

a laboratory technician made a measurement and got a result of 257.842. however, the doctor wanted measurements to the nearest tenth. what measurement should be reported to the doctor? 1 257.7 2 257.8 3 258.0 4 257.84

Explanation:

Step1: Identify the digit in the tenths place

The number is 257.842. The digit in the tenths place is 8.

Step2: Look at the digit in the hundredths place

The digit in the hundredths place is 4.

Step3: Apply the rounding - off rule

Since 4 < 5, we do not round up the digit in the tenths place. We drop the digits after the tenths place.

Answer:

B. 257.8