Answer:
An equivalent hydroelectric plant can provide up to 8.2 million homes in the United States.
Explanation:
According to the U.S. Energy Information Administration, a typical U.S. home has an average yearly consumption of 
in 2018. The quantity of house that can be provided is:
An equivalent hydroelectric plant can provide up to 8.2 million homes in the United States.
Answer:
Answered in Python
for i in range(21):
for j in range(i):
print(i, end=' ')
print(" ")
Explanation:
This iteration iterates from 1 to 20
for i in range(21):
This iteration iterates from 1 to current number
for j in range(i):
This prints the current number in the a number of times equal to itself
print(i, end=' ')
This enables printing on new line
print(" ")
