Above is a utility schedule for your grandmother. Assume the equilibrium price of Product A is $5 and the equilibrium price of Product B is $2, and your grandmother can only consume these two goods. How many units of Product B do you suggest your grandmother purchase if you want her to maximize her utility and she only has $14 to spend on both goods?

Grandmother should purchase 2 units of both products

Explanation:

Let's denote

MU = Marginal utility

P = Price

Q = Quantity

The Utility will be maximum when both unit's MU/P is equal

Product A

Q       MU     P      MU/P

1         80    $5       16

2        40    $5       8

3        30    $5       6

4        15    $5        3

5         7      $5       1.4

6         6     $5        1.2

7         5      $5         1

8         3     $5        0.6

Product B

Q       MU     P      MU/P

1         30    $2       15

2        16     $2       8

3        15     $2       7.5

4        14     $2        7

5         13    $2       6.5

6         12    $2        6

7          11    $2        5.5

8         10  $2        5

As you can see above MU/P is same when grandma purchase 2 product each to maximize utility.

ans.

heterothermic organisms include those organisms that can switch between homeothermic (having body temperature higher than environment) and poikilothermic (having variation in internal body temperature) strategies.

some migratory birds show heterothermy as they decrease their metabolic rate during cold nights to keep their body temperature low. drop in metabolic rate allows increase in production efficiency of birds that reduces the internal body temperature to make it equal to external cold temperature during cold nights.

thus, the correct answer is 'birds allow their temperature drop in order to increase their production efficiency.'