The answer is 12.58 rounded up it would be 13 so the correct answer is A
The function that is a tangent to the graph of f is 
<h3>What is the concept of integral?</h3>
The definite integral can be interpreted as the resulting area of a region. In addition, it is a value in its result, that is, it does not depend on the variable x, which can be exchanged for any other variable without changing the value of the integral.
Knowing that :
- 40x + y = 0 is tangent of f(x)
- slope of the line = -40
therefore, f'(x)|x=a = -40, so only look for a we have:
if, x = -2, then y = 80 (since, 40x + y = 0), therefore, f(x) passes through (-2,80), so in the equation:
Therefore,
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X^2 + 5x - 5 = 0
This is a quadratic equation that cannot be factored. It can be solved using the quadratic formula or by completing the square.
the quadratic formula is x = (-b +-sqrt(b^2 - 4ac))/2a
a is the coefficient of the x^2, b is the coefficient of the x, and c is the constant.
a = 1, b = 5, c = -5
x = (-5 +- sqrt(25+20))/2
x = (-5 +- sqrt(45))/2
x = (-5 + - 3 sqt 5))/2
x = (-5 + 3sqrt5)/2 and x = (-5 - 3sqrt5)/2
So the (1+2) could be with the 2 under the fraction or not
PEMDAS
simplify parenthasees first
then mulitplicationthen division
then addition and subtraction
6/2(1+2)
if it is
(6/2)(1+2) then go to AAAAAAAA
if it is 6/(2(1+2)) then go to BBBBBBBBB
AAAAAAAAAA
(6/2)(1+2)
simplify 6/2
2/6=3
also simplify 1+2
1+2=3
(3)(3)=9
BBBBBBBB
6/(2(1+2))
simplify inner parthenasees first
1+2=3
6/(2(3))
multiply with parenthaseess
2(3)=6
6/6=1
theh answer is either 9 or 1 depending on where the parenthasees is
