18 that question is confusing so I guessed sorry dude
A=pi(r)^2
45=pi(r)^2 divide by pi (3.14)
14.33=r^2 square root both sides
3.79=r round
r=4
Fist we find the legnth of the diagonal
a^2+b^2=c^2
3^2+4^2=c^2
9+16=c^2
25=c^2
c=5
now the other diagonal
11^2+5^2=c^2
121+25=c^2
146=c^2
sqrt both sides12.083
closest is B
Answer: second option
Step-by-step explanation:
The standard form of a quadratic equation is:

Then, to write the quadratic equation given in the problem in standard form, you must substract 1 from both sides of the equation. Then you have:

Given the quadratic equation above, to find the value of
you must substitute:
a=2; b=5 and c=-1 into
Thenrefore, you obtain the following result:
