Which shows the algebraic representation of the phrase
"Twenty-eight plus the product of five and a number and its value when a = 4.27
A 28 - Sn when n = 4.2 the value is 7
B 28 +3n when n = 4.2 the value is 49
C 28-3n when n= 4.2 the value is 112.6
D 28+ Sn when n = 4.2 the value is 122.6

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 4 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?