A. 3 and 4
B. 4 and 6
C. 4 and 9
D. 4.7 and 5.7
E. 8 and 27
correct answer with explanation will be chosen as best answer!
2007-07-11 16:39:55 · 5 answers · asked by Moohlah. 2 in Science & Mathematics ➔ Mathematics
x^5.4 is the square of x^2.7
When you square a number already raised to an exponent, you multiply the exponent times 2.
(x^2.7)^2 = x^(2.7 * 2) = x^5.4
2 < x^2.7 < 3 square everything to get
? < x^5.4 < ?
(2^2) < x^2.7 < (3^2)
4 < x^5.4 < 9
2007-07-11 16:45:59 · answer #1 · answered by bedbye 6 · 0⤊ 0⤋
2 < x^2.7 < 3
x^5.4 = x^(2.7*2) = (x^2.7)^2
So square the entire inequality:
2^2 < x^5.4 < 3^2
4 < x^5.4 < 9
2007-07-11 23:42:38 · answer #2 · answered by whitesox09 7 · 1⤊ 0⤋
2 < x^2.7 < 3,
take square of each side
4
Answer:
C. 4 and 9
2007-07-11 23:43:40 · answer #3 · answered by iyiogrenci 6 · 0⤊ 0⤋
x^5.4=(x^2.7)^2
So we just square 2 and 3 and get 4 and 9. Answer C.
2007-07-11 23:41:49 · answer #4 · answered by Red_Wings_For_Cup 3 · 1⤊ 0⤋
The anser is F. I have no clue :) there is a guy here at my job who might no the answer but he's not here right now.
2007-07-11 23:42:25 · answer #5 · answered by Trish 5 · 0⤊ 2⤋