Solve for r using factoring:
Solve for r:
r^2 - 8 r - 33 = 0
The left hand side factors into a product with two terms:
(r - 11) (r + 3) = 0
Split into two equations:
r - 11 = 0 or r + 3 = 0
Add 11 to both sides:
r = 11 or r + 3 = 0
Subtract 3 from both sides:
Answer: r = 11 or r = -3
The submarine would be 900 below the ocean surface after 12 minutes assuming it started its descent at the surface of the ocean.
K(x)=moles
p(x)=rollls
subsitute k(x) for x in p(x)
p(k(x))=2(x-1)+3=2x-2+3=2x+1
that is
p(x)=2x+1 for
p(x)=rolls
and x is toes
