2006-09-13 20:10:59 · 9 answers · asked by Wasiq 1 in Science & Mathematics ➔ Mathematics
2*(28)^1/2 / 7=2*(4*7)^1/2 / 7=2(+/-2) / 7
+/-4(7)^1/2 / 7=+/-4 rt 7 / 7
however if 28/7 is under root your answer of 4 is right
2*(28/7)^1/2=2*(4)^1/2=+/-4
2006-09-13 20:27:37 · answer #1 · answered by raj 7 · 1⤊ 0⤋
No.
â28 = 5.29150262
2 *â28 = 10.5830052
(2*â28)/7 = 1.51185789
2006-09-14 03:15:28 · answer #2 · answered by sheijin 2 · 0⤊ 1⤋
in order for the answer to be 4 then it sgould be expressed.
2*sqrt (28/7) = 2 *sqrt (4) = 2 *2 =4
please be more carefull
2006-09-14 03:23:13 · answer #3 · answered by Emmanuel P 3 · 1⤊ 0⤋
if ans is 4 then the question should be 2*sqrt(28/7) = 2*sqrt(4) = 2*2 =4
but value od current expression is 2*2sqrt(7)/7 = 4/sqrt(7)
2006-09-14 04:50:08 · answer #4 · answered by Mein Hoon Na 7 · 0⤊ 0⤋
hi,
in order to solve this porblem, 1st find the square root of 28. teh square root of 28 = 5.29150262 . multiply this answer by 2. ( 2 * 5.29150262 = 10.58 ) . u do this as this is gievn in parenthesis (brackets) . now divide the answer by 7.... that is .... (10.58 / 7) = 1 . 511 is the answer . and i am sorry, your anser is wrong .
2006-09-14 03:20:12 · answer #5 · answered by Alen 4 · 0⤊ 1⤋
type 2 on ur calculator followed by th multiplication sign x then type th root sign followed by 28. get th answer of that then divide by 7th final answer shld b 1.51
2006-09-14 05:22:16 · answer #6 · answered by smart_eluh 4 · 0⤊ 0⤋
2*sqrt(28)/7=4*sqrt(7)/7=1.511857
2006-09-14 03:14:39 · answer #7 · answered by priestlake22 2 · 0⤊ 1⤋
I agree with Sheijin.
He did a great job of explaining it step by step.
I think he has the qualities of a great math teacher.
The answer is 1.5118578...
2006-09-14 03:21:12 · answer #8 · answered by Anonymous · 0⤊ 1⤋
its 4/root(7)
2006-09-14 03:13:38 · answer #9 · answered by Anonymous · 0⤊ 1⤋