Concept explainers
Correcting a Prediction The financial analysts at the store in Example 5 corrected their projections and are now expecting the total sales for the
day of January to be
thousand dollars.
a. Let
be as in Example 5. Compute
and
b. Compare and interpret the data in part (a) as they pertain to the sales on January
Example 5:
Declining Sales:
At the end of holiday season in January, the sales at a department store are expected to fall (Fig. 3). It is estimated that for the
day of January the sales will be
thousand dollars.
a. Compute
b. Estimate the value of sale on January
and compare your result with the exact value
Solution:
a. We have,
thousand dollars.
To compute
as
The equation
and
the sales are
and are falling at the rate of
b. To estimate
Thus, our estimate of the sales on January
from the formula:
This is close to our estimate of
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EBK CALCULUS & ITS APPLICATIONS, BRIEF
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