At lawson middle school mr. hernandez as 90 randomly selected students from each grade level for their favorite subject and 28 chose social studies as their favorite he use this data to draw the inference that out of 250 middle school students about 20% prefer social studies did he make a reasonable inference

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 : )

step-by-step explanation:

hans did not square the 40-unit side; he merely multiplied it by 2.   incorrect.