What hour should each influencer post to get exactly 64,500 likes?

Rihanna: L(t) = -1² +13t-20

Drake: L (t) = -2t² + 17.5t - 10

YoungBoy: L (t)=-² +30t-150

Answer should be in hours

Rihanna

Drake

Young Boy

A :: Hour 13 (1:00pm)

B :: Likes won't reach exactly 64,500

C :: Hour 18.24 (6:14pm)

Match with them