Search 7,000+ topics

Practice problem

Word Problems with Quadratic Inequalities

By Evan Fang
+1 contributors
Contributors

Suppose f(x)=−x2+2019x−1100f(x) = -x^2+2019x-1100. On Monday, Francis learns of a watermelon challenge involving ff. The next day, on Tuesday, Francis will buy f(1)f(1) watermelons, then on Wednesday he'll buy f(2)f(2) watermelons, and so on. In particular, the following Monday he will buy f(7)f(7) watermelons.

Francis keeps buying f(x)f(x) watermelons xx days after the first Monday, until f(x)f(x) is less than 00. What day of the week is the first day Francis will stop buying watermelons?

Choose one answer

Type a concept, like “slope” or “photosynthesis”.

↑ ↓ to choose · Enter to openSearch explanations and problems