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3 years ago

A newspaper reports the following changes in the temperature of a city over 4 days:

Mathematics

1 answer:

Alexeev081 [22]3 years ago

6 0

9514 1404 393

Answer:

a) (2.64 -2/9 -0.35 +5/8)/4

b) perform the sum, then the division, then round as needed

Step-by-step explanation:

a) The average of a number of items is their sum, divided by the number of items. Here, we want the average of 4 changes, so we compute it as the sum of the changes divided by 4.

average change = (2.64 -2/9 -0.35 +5/8)/4

b) My calculator is capable of adding these numbers directly. For a result rounded to the nearest hundredth, it can be a good idea to represent the fractions using at least 3 decimal digits.

So, the steps would be ...

convert fractions to their decimal equivalents, using 3 decimal digits
add up the values
divide by 4
round to hundredths

Performing these steps, we get ...

average change = (2.64 -0.222 -0.35 +0.625)/4 = 2.693/4

average change ≈ 0.67 . . . degrees

The average daily temperature change of a city was 0.67 degrees.

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