Please help me

e(t) models the daily amount of energy (in kilojoules, kj) that a solar panel in pago pago generates, t days
after the autumn equinox. here, t is entered in radians.
e(t) = 624 sin
27
-t) + 8736
365
what is the first day after the autumn equinox that the solar panel generates 8400 kj?
round your final answer to the nearest whole day.
no