1. Find the length of a

19.20 would be length a

Step-by-step explanation:

we would use the pythagorean theorem a^2+b^2=c^2

12^2+15^2=c^2

144+225=c^2

369=c^2

√369=c

19.20=c

It would be greatly appreciated if you gave me the brainlest

the correct answer is the second option

sinn is the total amount of students now and m were the students before, you subtract them both (n-m) and divide that by m. then, since to get a percentage from a fraction you have to multiply by 100, your answer should look like this: n-m/m*100

step-by-step explanation: