Answer:
The expected value of a ticket is of -$5.
Step-by-step explanation:
The expected value of the ticked is the probability of earning each prize multiplied by the prize, and subtracted by the value of the ticket.
Value of the ticket:
$10.
100 tickets are sold. They will award one first prize of $300, one second prize of $150, and one third prize of $50.
Thus, 1/100 probability of earning $300, 1/100 probability of 150 and 1/100 probability of 50. So

The expected value of a ticket is of -$5.
Answer:
Which gas creates the longest wavelength?
→Argon gas
Which gas creates the shortest wavelength?
→ Fluorine gas
Explaination:
1.0×10^-6 > 1.0×10^-7 > 1.0×10^-10 (a^-n =1/a^n)