Can somebody plz help answer both questions correct (only if u know how) WILL MARK BRAINLIEST WHOEVER ANSWERS THEM FIRST.. promise :DD

Which of the following is true for the relation f(x)=2x^2+1

Noel is hoping to make a profit (in $) on the school play and has determined the function describing the profit to be f(t) = 8t – 2654, where t is the number of tickets sold. what does the number 8 tell you?

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.