Chapter 16.2, Problem 60E

Solar Emissions The following model gives the flux of radio emission from the Sun¹⁸:

$F\left(t\right)=49.6\sin \left[0.602\left(t-1.48\right)\right]+111,$ where $t$ is the number of years since January 1, 1997, and $F\left(t\right)$ is the average flux of solar emissions of a specified wavelength at time t. Compute and interpret $F\text{'}\left(5.5\right)$.