Question

Three measurements are made as 18.425 cm, 7.21 cm and 5.0 cm. The addition should be written as (A) 30.635 cm (B) 30.64 cm (C) 30.63 cm (D) 30.6 cm​

Answer 1

(D) 30.6 cm

Step-by-step explanation:

Given the following data;

Measurement A = 18.425 cm

Measurement B = 7.21 cm

Measurement C = 5.0 cm.

To find the total measurement;

Total measurement = A + B + C

Total measurement = 18.425 + 7.21 + 5

Total measurement = 30.635 cm

However, an additional sum requires that all the numbers have a equal number of decimal points; 1 decimal point for 5.0 would be chosen.

Hence, we would round up the answer to 1 decimal point.

Total measurement = 30.6 cm