Three equal cubes are played adacentiy in a row. find the ratio of total surface area of the new cuboid to that of the sum of the surface area of the three cubes

What is the value of the expression below? (81^2)^1/8

Each month, a shopkeeper spends 5x + 14 dollars on rent and electricity. if he spends 3x−5 dollars on rent, how much does he spend on electricity? for which value(s) of x is the amount the shopkeeper spends on electricity less than $100? explain how you found the value(s).

School has 204 sixth grade students. if the sixth grade is 30% of the total school, how many students are in the middle school?