princess bought 7 items from a candy shop . She purchased chocolate bars for $1.50 each and bags of gummy bears for $3 each . If she spend a total of $13.50 , how many chocolate bars did she buy ?

An architect is designing a water fountain for a park she uses the given function to model the water jet flowing from the fountain nozzles where h(x) gives the height of the water jugs in feet x feet from the starting point h(x)=-1/20x+x+15

What is always true about a positive integer raised to a negative odd power?

Scores on a university exam are normally distributed with a mean of 78 and a standard deviation of 8. the professor teaching the class declares that a score of 70 or higher is required for a grade of at least “c.” using the 68-95-99.7 rule, what percentage of students failed to earn a grade of at least “c”?