Question

During a flu epidemic in a small town, a public health official finds that the total number of people P who have caught the flu after t days is closely approximated by the formula
P = −t2 + 24t + 131,
where 1 ≤ t ≤ 13.
(a) How many have caught the flu after 7 days?
people

Answer 1

replace t by 7 and compute
\[-7^2+24\times 7+131\]

Answer 2

i get 250 but it is late

Answer 3

isn't it 549?

Answer 4

oh no because don't forget that
\[-7^2=-7\times 7=-49\] and not
\[(-7)^2=49\]

Answer 5

i checked twice, still get 250

Answer 6

ohhyeah I did the second thing -_- n okey dokey thanks:D

Answer 7

It's right :D:D