Question

In a northern European country, the formula

y=0.036x 2 −2.8x+62.56

models the number of deaths per year per thousand people, y , for people who are x years old, 40¡Üx¡Ü60 . Approximately how many people per thousand who are 57 years old die each year? For the purposes of this problem, please round your answer to a whole number.

Approximately ___________ people per thousand who are 57 years old die each year.

Answer 1

just plug x = 57 into your equation and evaluate.
Surely you have a calculator.

you probably meant:
y=0.036x^2 −2.8x+62.56 , remember to square 57 first, then multiply by .036
Also be mindful that y is per thousand people, so you have to multiply your final answer by 1000.
At this point you realize that no rounding is needed.

Answer 2

thank you
is the answer 65

Answer 3

Does it sound plausible to you that in an entire country only 65 died in one year ?

how did you possible get 65?
show me your steps so I can see where you went wrong.

Answer 4

0.036^2-2.8x+62.56=57^2

Answer 5

.036(57^2) - 2.8(57) = 62.56
= 116.964 - 159.6 + 62.56
= 19.924 , but that is in thousands, so ....

19924

looks like you couldn't read your own writing, look at your first term