Irecently paid $45.75 for 12.2 gallons of gas. what was the cost per gallon of gas? how many gallons did i buy per dollar?

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.

Rewrite the following quadratic functions in intercept or factored form. show your work. y = 5x^2 + 10x

Unaware that 35% of the 10000 voters in his constituency support him, a politician decides to estimate his political strength. a sample of 200 voters shows that 40% support him. a. what is the population? b. what is the parameter of interest? state its value c. what is the statistics of the interest? state its value d. compare your answers in (b) and (c) is it surprising they are different? if the politician were to sample another 200 voters, which of the two numbers would most likely change? explain