Question

< Desmos Scienti... Pearson Sign In my lab math ans... Pearson's MyLab... log calcu Math 1314 College Algebra Summer 2020 Hartman Homework: Section 5.4 Homework Score: 0.5 of 1 pt x 5.4.141 A pot of boiling water with a temperature of 100°C is set in a room with a temperature of 20°C. The temperature T of the water after x hours is given by T(x) = 20 + 80 e -. (a) Estimate the temperature of the water after 3 hours. (b) How long did it take the water to cool to 70°C?

Answer 1

2 * T(2) = 204806 -3 Il ca) at 2 = 3; T(3) = 20+80 € 23.98 = 24°C b) |(7) = 40° to a . 20 + 802 2 50 - 80 e en = vol op In(1.6) x = 0.47 hours ř 28, 2 minutes