Lena received a 70 gift card for a coffee store. she used it in buying some coffee that cost 8.63 per pound. after buying the coffee, she had 44.11 left on her card. how many pounds of coffee did she buy?

Solve each quadratic equation by factoring and using the zero product property. 10x + 6 = -2x^2 -2

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”?

Aschool had an election where the candidates received votes in the ratio 1: 2: 3. if the winning candidate received 210 votes, how many total people voted in the election?