The answer is 67.93939393939394
<span><span>
It would be 17.64 for the area</span></span>
<u><em>The correct answer here is d</em></u>
d = 3a + 3b
d - 3a = 3b
d - 3a/3 = b
<span>The correct answer is 67.5.
Explanation<span>:
10.4%=10.4/100=0.104.
We are finding 10.4% of an unknown number, so this gives us
0.104x=7.02.
To solve this, divide both sides by 0.104:
0.104x/0.104=7.02/0.104
x=67.5</span></span>
Answer:

the estimate the percent change in q when the price is raised from $2.00 to $2.10 decreases by 25%
Step-by-step explanation:
Given that:
the number of units demanded 
Taking differentiations ; we have,


Now; the price elasticity of demand using the differentials definition of elasticity is:

![E(p) =[(1-3)e^{-3p}]*[\dfrac{p}{pe^{-3p}}]](https://tex.z-dn.net/?f=E%28p%29%20%3D%5B%281-3%29e%5E%7B-3p%7D%5D%2A%5B%5Cdfrac%7Bp%7D%7Bpe%5E%7B-3p%7D%7D%5D)

(b) Use your answer from part (a) to estimate the percent change in q when the price is raised from $2.00 to $2.10.
The estimate of the percentage change in price is :

= 5%
From (a)

Now at p = $2.00
E(2) = 1 - 3 (2.00)
E(2) = 1 - 6
E(2) = -5
The percentage change in q = -5 × 5%
The percentage change in q = -25%
Thus; we can conclude that the estimate the percent change in q when the price is raised from $2.00 to $2.10 decreases by 25%