Answer:
Step-by-step explanation:
This problem is just really long- it's trying to confuse you with complicated wording. Here's it demystified:
a) 
t = 0 degrees Celsius
d = 1500 meters
Find the temperature, T.
b)
d = 300 meters
T = 26 degrees Celsius
Find the ground temperature, t.
NOTE: The temperatures are different! T is the final temperature and t is the ground temperature.
 
        
             
        
        
        
Answer:

Step-by-step explanation:

Multiply the numerator and denomiator of 1/16 by 2 so that the denominators are equal and we can subtract.

Then, subtract

 
        
             
        
        
        
Answer:
0.4%
Step-by-step explanation:
We have two independent events
- The athlete who is being tested for drugs actually is using steroids.
- The test went wrong indicating a false result.
The probability of 1) to happen is 0.04 because "4% of all registered athletes use steroids".
The probability of 2) ti happen is 0.1 because "The imperfect test gives positive results (indicating drug use) for 90% of all steroid-users"
Then the probability of 1) and 2) to happen is given by 
 =0.4%
=0.4%
 
        
             
        
        
        
Step-by-step explanation:
The choices are not given but the graph looks like the above picture.