Answer:
Use Heron's formula; see below.
Step-by-step explanation:
Use Heron's formula.
Let the sides of the triangle have lengths a, b, and c.


Example:
A triangle has side lengths 3, 4, and 5 units.
Find the area of the triangle.








1.4/7 in simplest form is 0.2/1 because you divide each side by 7.
The answer is D. all you have to do is solve for y.
Answer:
Susie must be willing to pay $35 for it to be efficient for government to produce the third unit
Step-by-step explanation:
We have given marginal cost MC = $100
For government it is efficient to provide public good when Marginal benefit from good = MC of good.
MC = $ 100 so MB from all people must be equal to 100
MB = 40 + 25 + x
MC = MB
100 = 40 + 25 + x
x = 35
So Susie must be willing to pay $35 for it to be efficient for government to produce the third unit
So option (a) is correct answer