A student receives 83.2 points, 44.6 points, 74.4 points, and 52.3 points on each of four tests. Determine the student's test av

Question

xeze [42]

3 years ago

6

A student receives 83.2 points, 44.6 points, 74.4 points, and 52.3 points on each of four tests. Determine the student's test av

erage with the correct significant digits.

Chemistry

1 answer:

kow [346] · Answer 1 · 2022-05-17T12:11:23+03:00

Answer:

The average is 63.6

Explanation:

Step 1: Calculate the total points of all tests together

The total of the 4 tests is : 83.2 points + 44.6 points + 74.4 points + 52.3 points = 254.5 points

Step 2: Calculate the average points

We have 4 tests so we divide the total number by 4

254.5 points / 4 = 63,625 points

Step 3: take significant digits into account

Sum or difference : Add or subtract in the normal way, then round the answer to the LEAST number of places to the decimal point of any number in the problem

⇒ in this case : 83.2 + 44.6 + 74.4 + 52.3 = 254.5

Multiplication and division: the answer is reported in such a way that it reflects the reliability of the least precise operation. Your answer cannot be MORE precise than the least precise measurement.

254.5 / 4 = 63.6