5,12,13
5X5=25
12X12=144
25+144=169
answer: square root 169=13
Answer is C. Definitely not d right off the bat because both exponents are negative so cross that out. After that its just counting zeros.
Two meters is greater because there are about 79 inches in two meters and when you do 6 x 12 you get 72 inches, so six feet are less than two meters. Vice versa if you wanted the smaller length.
Jamie's age is n. (given)
Brian's age is 2n. (given)
Half of Brian and Jamie's present age is (n +2n)/2 = 3n/2.
Let m represent Morgan's age now. Then
... m + 8 = 2 + 3n/2 . . . . . in 8 years, Morgan's age will be 2 more than ...
Subtract 8 to find Morgan's present age:
... m = 3n/2 - 6 . . . . Morgan's present age
