Question

P(r)=r^2-0.1
144
What is the approximate value of P(3)?
A.0.20
B.0.034
C.0.062
D.0.041

Answer 1

What is the 144 in the posted problem?

Answer 2

It's supposed to be divide by 2-0.1/144

Answer 3

@ambermarie151

Would you click on the blue DRAW tab and write the equation as it appears in your text? Thanks.

Answer 4

The equation is probably

\[\Large P(r) = \frac{r^2-0.1}{144}\]

but that's just an educated guess

Answer 5

Yes that's it

Answer 6

ok so you just replace every copy of r with 3
\[\Large P(r) = \frac{r^2-0.1}{144}\]
\[\Large P({\color{red}{r}}) = \frac{({\color{red}{r}})^2-0.1}{144}\]
\[\Large P({\color{red}{3}}) = \frac{({\color{red}{3}})^2-0.1}{144}\]
then you evaluate the right side

Answer 7

hopefully that makes sense @ambermarie151

Answer 8

So would you do 3•3 -0.1 then divide by 144 ?

Answer 9

correct since 3^2 means 3*3

Answer 10

I am still confused

Answer 11

I get a decimal

Answer 12

what decimal value did you get?

Answer 13

it's perfectly normal in this case to get a decimal value