You can't say he is correct. 3:1 in when mixing a solution is not the same as 1:3. if you change the direction of the ratio you change the formula. 1 part cleaner to 3 parts water is totally different than
3 parts cleaner to 1 part water

step-by-step explanation:

if you want to solve percent error follow these steps.

1. subtract the accepted value from the experimental value.

2. take the absolute value of step 1.

3. divide that answer by the accepted value.

4. multiply that answer by 100 and add the % symbol to express the answer as a percentage.

if you want to solve percent of change just do this.

1. work out the difference (increase) between the two numbers you are comparing.

2. divide the increase by the original number and multiply the answer by 100. if your answer is a negative number then this is a percentage decrease.

hope this : )

hint: which coefficient is a multiple of 360°?

step-by-step explanation: