Question

A funny joke is spreading through the office. The speed that it is spreading can be modelled by the equation f(x) = 4 + e^x, where x is the time in minutes and x \geq 0.
a Find out many employees heard the joke initially
b Find how many minutes it took before 150 employees heard the joke

Answer 1

Explicación paso a paso:

In t= 0 there are 4 people hearing.

To get to 150 people:

150 = 4 + e^x

e^x = 146

x = loge(146)= 5 minutes