<gh_stars>0
# Note that this code uses scientific notation to define large numbers. 
# 4.445e8 is equal to 4.445 * 10 ** 8 which is equal to 444500000.0.

# The current volume of a water reservoir (in cubic metres)
reservoir_volume = 4.445e8
# The amount of rainfall from a storm (in cubic metres)
rainfall = 5e6

# decrease the rainfall variable by 10% to account for runoff
decrease = 0.1 * rainfall



# add the rainfall variable to the reservoir_volume variable
add = rainfall + decrease



# increase reservoir_volume by 5% to account for stormwater that flows into the 
# reservoir in the days following the storm
increase = 0.05 * add



# decrease reservoir_volume by 5% to account for evaporation
decrease_reservoir_volume = 0.05 * increase


# subtract 2.5e5 cubic metres from reservoir_volume to account for water that's piped to 
# arid regions.
subtract = decrease_reservoir_volume - 2.5e5



# print the new value of the reservoir_volume variable
print (subtract)
# Note that this code uses scientific notation to define large numbers. 
# 4.445e8 is equal to 4.445 * 10 ** 8 which is equal to 444500000.0.

# The current volume of a water reservoir (in cubic metres)
reservoir_volume = 4.445e8
# The amount of rainfall from a storm (in cubic metres)
rainfall = 5e6

# decrease the rainfall variable by 10% to account for runoff
decrease = 0.1 * rainfall



# add the rainfall variable to the reservoir_volume variable
add = rainfall + decrease



# increase reservoir_volume by 5% to account for stormwater that flows into the 
# reservoir in the days following the storm
increase = 0.05 * add



# decrease reservoir_volume by 5% to account for evaporation
decrease_reservoir_volume = 0.05 * increase


# subtract 2.5e5 cubic metres from reservoir_volume to account for water that's piped to 
# arid regions.
subtract = decrease_reservoir_volume - 2.5e5



# print the new value of the reservoir_volume variable
print (subtract)
# Note that this code uses scientific notation to define large numbers. # 4.445e8 is equal to 4.445 * 10 ** 8 which is equal to 444500000.0. # The current volume of a water reservoir (in cubic metres) # The amount of rainfall from a storm (in cubic metres) # decrease the rainfall variable by 10% to account for runoff # add the rainfall variable to the reservoir_volume variable # increase reservoir_volume by 5% to account for stormwater that flows into the # reservoir in the days following the storm # decrease reservoir_volume by 5% to account for evaporation # subtract 2.5e5 cubic metres from reservoir_volume to account for water that's piped to # arid regions. # print the new value of the reservoir_volume variable