Suppose you manage a delivery company and you must choose between two transportation methods: (a) truck or (b) train. (a)trucks: costs u$ 26,000 upfront. for each mile it runs it costs u$ 2.00 in gas. maintenance costs u$ 4,000 per year and additional u$ 1.00 per mile run. (b)train: to lease a container that carries the same volume of orders as the truck it costs u$ 10.000 per year. in addition it costs u$ 4.00 per mile to move orders around. suppose you had to transport packages over 5000 miles in 2017. what's your average cost for that year ?
a: u$ 6.60 for (a) truck and us 2.80 for (b) train.
b: u$ 9.00 for (a) truck and u$ 6.00 for (b) train.
c: u$ 3.00 for (a) truck and u$ 4.00 for (b) train.
d: u$ 6.00 for (a) truck and u$ 2.00 for (b) train.

The correct answer is (B) U$ 9.00 for (a) truck and U$ 6.00 for (b) train.

Explanation:

Average Cost = Total Cost/ Total miles Run = Total Cost/ 5000

Total Miles Run = 5000

a) Calculations FOR TRUCK

Data that is given:

$ 26,000 upfront;

U$ 2.00 in gas per mile run

Maintenance costs U$ 4,000 per year

Additional U$ 1.00 per mile run

Total Miles Run = 5000

 Total Cost = 26000 + 2*Total Miles Run + 4000 + 1*Total Miles Run = 26000+2*5000+4000+5000= $45000

⇒Average Cost of a TRUCK = Total Cost/5000 = 45000/5000 = $9

b) Calculations for train:

It costs U$ 10.000 per year

$ 4.00 per mile to move orders around

Total Cost for Train = 10000 + 4*Total Miles Run = 10,000 + 4*5000 = 30,000.

⇒Average Cost of Train for That year = Total Cost of Train/ 5000 = 30,000/5,000 = $6

So, $9.00 for truck and $6.00 for train.

n

explanation:

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.'