The value of the card was $13 when he originally purchased it.
Answer:
Step-by-step explanation:
P = 2(3x-20) + 2(2x+4) = (6x-40) + (4x+8) = 10x-32
Answer: 0.1037
Step-by-step explanation:
Given : Mean : 
Standard deviation : 
The formula to calculate the z-score is given by :-

For x = 97 miles per day ,

For x = 107 miles per day ,

The P-value =

Hence, the probability that a truck drives between 97 and 107 miles in a day = 0.1037