Answer:
The cost per month is increasing at a rate $365.
Explanation:
Differentiation Formula
Given that,
A manufacturer of handcrafted wine racks has determined that the cost to produce x units per month is given by
.
Again given that,
the rate of changing production is 13 unit per month
i.e 
To find the cost per month, we need to find out the value
when production is changing at the rate 13 units per month and the production is 70 units.

Differentiating with respect to t




Plugging 


[ plugging x=70]
=364
[ The unit of c is not given. Assume that the unit of c is dollar.]
The cost per month is increasing at a rate $365.
<span>the answer for this question is 10.50%</span>
Answer: a. 11.5%
Explanation:
Fad followers are those investors who follow a trend when it emerges and as such their betas will be less than that of informed traders because the informed traders would have acted first.
Using the Capital Asset Pricing Model to calculate expected return.
Er = Rf + b( Rm - Rf)
Er = Expected return
Rf = Risk Free Rate
b = Beta
Rm = Market Return.
The Expected Return for the Informed Investors is,
= 4% + 1.4 ( 10% - 4%)
= 4% + 1.4 ( 6%)
= 12.4%
With the Fad followed expected to have a lower beta and therefore a lower expected return than the Informed Investors, the only suitable option is the 11.5%.