Exponential functions

Problem 1. Evaluate the following correct to 4 decimal places, using a calculator:

0.0256(e5.21 − e2.49)

0.0256(e5.21 − e2.49) = 0.0256(183.094058 . . .− 12.0612761 . . .) = 4.3784, correct to 4 decimal places.