The excretory system is related to the increase or decrease in the consumption of water by an animal. The increase or decrease is due to the variation in the antidiuretic hormones in the humans. The retention and excretion of excess water and ions are performed by the kidneys, which is a part of the excretory system.
Answer:
represents the TOTAL revenue at time 
.
Explanation:
is the revenue at the time at the first restaurant.
is the revenue at the time at the second restaurant.
If we want to know the TOTAL revenue at the time , we would sum these quantities:
TOTAL revenue = 
So represents the TOTAL revenue at time .
Answer:
D) Susie would buy more massages and fewer rounds of golf,as predicted by the substitution effect.
Explanation:
Let's check the utility that Susie gets from consuming these products.
The second round of golf gives her 20 units of satisfaction at $20 = 20/20 = 1
The third massage gives her 30 units of satisfaction at $30 = 30/30 = 1
But now the price the price for massage has come down to $15. The ratio of their prices would be
20/15 = 1.333
1.3 is greater than 1
So she should substitute golf for massages
Answer:
Money serves as a medium of exchange, as a store of value, and as a unit of account.
