If cyanide in a stream next to a gold mine increases from 240 ppm to 360 ppm, what percent increase is this?

Given :

Initial concentration , 240 ppm .

Final concentration , 360 ppm .

To Find :

Percent increase.

Solution :

Percentage increase is given by :

Therefore , percent increase is 50 % .

Hence , this is the required solution .

The maximum number of toys you can afford to buy is 40

Step-by-step explanation:

Let

x -----> the number of toys

we have the compound inequality

Divide into two inequalities

-----> inequality A

----> inequality B

Solve the inequality A

Divide by 11 both sides

Rewrite

Solve the inequality B

Divide by 11 both sides

The solution for x is the interval  ----> [13,40}

Remember that the number of toys must be a whole number

The domain is all whole numbers greater than or equal to 13 toys and less than or equal to 40 toys

therefore

The maximum number of toys you can afford to buy is 40