Chapter 5 - Exponential and Logarithmic Functions - 5.3 Exponential Functions - 5.3 Assess Your Understanding - Page 280: 17

a)$\approx21.217$ b)$\approx22.217$ c)$\approx22.440$ d)$\approx22.459$

We calculate them by using a calculator and then round them to the first $3$ decimal digits. a)$3.1^{2.7}\approx21.217$ b)$3.14^{2.71}\approx22.217$ c)$3.141^{2.718}\approx22.440$ d)$\pi^{e}\approx22.459$