Antara berikut, yang manakah bukan ungkapan kuadratik dalam satu pemboleh ubah?
A
- 5
B 3x2 + x-2
CP(3 - 2p)
D
-k² + 4k​

Can someone me with my hwplz(only the circled ones)

See attachment below and find the equivalent of tan(∠qsr)

Aparking garage charges $1.12 for the first hour and 0.50 for each additional hour. what is the maximum length of time tom can park in the garage if we wishes to play no more than $5.62