The company picnic cost $ 1300 for 80 employees
Solution:
Given that cost of a company picnic varies directly as the number of employees attending the picnic
Let "c" be the company picnic cost
Let "n" be the number of employees attending the picnic
Therefore,
![cost \propto \text{ number of employees attending picnic }](https://img.qammunity.org/2021/formulas/mathematics/middle-school/97mkkl7omw1sec4yk5ki4hgqejp90ro2jk.png)
![c \propto n\\\\c = kn](https://img.qammunity.org/2021/formulas/mathematics/middle-school/iz6iq6cldz88f07j4pq3ljy00j5y1wr2qy.png)
Where "k" is the constant of proportionality
c = kn ---------- eqn 1
Given that company picnic costs $487.50 for 30 employees
Therefore substitute c = 487.50 and n = 30
![487.50 = k(30)\\\\k = (487.50)/(30) = 16.25](https://img.qammunity.org/2021/formulas/mathematics/middle-school/33c879qhpul60w5u2wrmojv3u3pmbt3uze.png)
How much does a company picnic cost for 80 employees?
Substitute n = 80 and k = 16.25 in eqn 1
![c = 16.25(80) = 1300](https://img.qammunity.org/2021/formulas/mathematics/middle-school/otyg5lmbrmj7770sttji3wnjurq3ecahc5.png)
Thus $ 1300 is the cost for 80 employees