Factor 64a^3 - 8b^3 explain all steps

On saturday a souvenir shop had 125 customers.sixty four percent of the costumers paid with a credit card. how many costumers paid with cash?

Human body temperatures have a mean of 98.20° f and a standard deviation of 0.62°. sally's temperature can be described by z = 1.4. what is her temperature? round your answer to the nearest hundredth. 99.07°f 97.33°f 99.60°f 100.45°f

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.