The temperature at 7pm was 45 degrees Fahrenheit. From 7pm to 11pm the temperature decreased 5 degrees each hour. Which equation can be used to find t, the temperature at 11pm?

t = 45 - 5(11-7)
t = 45 - 5(11+7)
t = 45 / 5(11-7)
t = 45 + 5(11-7)