Question

Titus works at a hotel. Part of his job is to keep the complimentary pitcher of water at least half full and always with ice. When he starts his shift, the water level shows 8 gallons, or 128 cups of water. As the shift progresses, he records the level of the water every 10 minutes. After 2 hours, he uses a regression calculator to compute an equation for the decrease in water. His equation is W –0.414t + 129.549, where t is the number of minutes and W is the level of water. According to the equation, after about how many minutes would the water level be less than or equal to 64 cups?

Answer 1

Help me please

Answer 2

So what you do is that you have your equation. Which is W= –0.414t + 129.549
So you want to find when it is less than or equal to 64.
So...
\[64\ge-.414t+129.549\]
Solve for t to find the answer