If Ana considers cake a substitute for Top Ramen noodles, and her quantity demanded for Top Ramen goes from 30 to 40 packets every six months when the price of cake goes from $15 to $35 a cake, what is her cross-price elasticity of demand for Top Ramen (using midpoint method)

$0.35

Explanation:

The computation of the price elasticity of demand using mid point formula is shown below:

= (change in quantity demanded ÷ average of quantity demanded) ÷ (percentage change in price ÷ average of price)

So, Change in quantity demanded would be

= Q2 - Q1

= 40 - 30

= 10

Now, Average of quantity demanded

= (40 + 30) ÷ 2

= 35

Change in price

= P2 - P1

= $35 - $15

= $20

And, the average of price would be

= ($35 + $15) ÷ 2

= $25

Cross price elasticity of demand = (10 ÷ 35) ÷ ($20 ÷ $25)

= 0.28 ÷ $0.8

= $0.35

i believe it’s b because the rest don’t make sense

15 pounds of apples and 6 cups of flour