Given: f(x) = 2x^2 +5sqrt(x-2)
Evaluate this for x=6:
f(6) = 2(6)^2 + 5sqrt(6-2) = 72 + 5(2) = 72 + 10 = 82 (answer)
Apply the standard equation of a circle:
(x-h)²+(y-k)²=R²
== (x-3)²+(y+2)²=25
Answer
a) y | p(y)
25 | 0.8
100 | 0.15
300 | 0.05
E(y) = ∑ y . p(y)
E(y) = 25 × 0.8 + 100 × 0.15 + 300 × 0.05
E(y) = 50
average class size equal to E(y) = 50
b) y | p(y)
25 | 
100 | 
300 | 
E(y) = ∑ y . p(y)
E(y) = 25 × 0.4 + 100 × 0.3 + 300 × 0.3
E(y) = 130
average class size equal to E(y) = 130
c) Average Student in the class in a school = 50
Average student at the school has student = 130
17/30, The peanuts by a dollar per pound (peanuts cost $3, walnuts cost $2), $21, 40072/100 (and I'm not sure how you would reduce it) Good luck!
B. ) Unless you're missing some data.