Lucas and david and measure the length of the school garden who's his measurement is 11.3 m in devin's measurement is 113 cm could both be correct explain

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

Use the frequency distribution, which shows the number of american voters (in millions) according to age, to find the probability that a voter chosen at random is in the 18 to 20 years old age range. ages frequency 18 to 20 5.9 21 to 24 7.7 25 to 34 20.4 35 to 44 25.1 45 to 64 54.4 65 and over 27.7 the probability that a voter chosen at random is in the 18 to 20 years old age range is nothing. (round to three decimal places as needed.)

Apositive number a or the same number a increased by 50% and then decreased by 50% of the result?