When adding fractions you need a common denominator so lets look at what "fractions" we are dealing with:2/3 1/6 and 1/4.
Answer:
3 e^t/2 + 4 = 27
e^t/2 = 23 / 3
Taking natural log of both sides
t/2 = ln 23/3 = ln 7.667 = 2.037
t = 4.074
Check:
3 e^4.074/2 + 4 = 27
27 = 27
There are 17 girls in the club. I subtracted 4 from 38, which gave me 34. Then I divided that by 2.
The last one is 54aquare units