5. One gallon of gas is used for 16 miles. A driver went 240 miles. How many liters of gas
were used? Round to the nearest tenth, if
necessary. (Hint: 1 gallon ~ 3.8 liters)

Galen sold tickets of his church’s carnival for a total of $2,820. children’s tickets cost $3 each and adult tickets cost $5 each. the number of children’s tickets sold was 30 more than 3 times the number of adult tickets slod. how many children’s ticket and how many adult tickets did he sell?

Afactory makes propeller drive shafts for ships. a quality assurance engineer at the factory needs to estimate the true mean length of the shafts. she randomly selects four drive shafts made at the factory, measures their lengths, and finds their sample mean to be 1000 mm. the lengths are known to follow a normal distribution whose standard deviation is 2 mm. calculate a 95% confidence interval for the true mean length of the shafts. input your answers for the margin of error, lower bound, and upper bound.

How many sides does a regular polygon have if each exterior angle measure is 45 degrees explain your answer, i really don't understand this.