Question

the answer i get in the back of my question book is the 2square root 13, the answer i get is square root 56, can someone tell me how it is that i'm suppose to obtain the description of the value, and i'm not aloud to use a calculator.

Answer 1

i get is square root 56,
what problem are you working on?
if you got sqrt(52) you could say sqrt(13*4)= 2*sqrt(13)

Answer 2

the question says a balloon is rising at 4m/s and the wind is blowing at rate of 6m/s parallel to the ground, find its resulting speed and its angle of point of descent

Answer 3

yes, your book is correct.

Answer 4

how did you sqrt(56)?

Answer 5

4^2+6^2=56

Answer 6

they both amount to the same value

Answer 7

you added wrong. check again

Answer 8

sorry thats 52 squared

Answer 9

now factor 52 into 2*2*13 so sqrt(52) becomes 2*sqrt(13)

Answer 10

whats a fast way to obtain those factors of this value

Answer 11

learn some rules:
if a number is even, the divisible by 2
sum of digits div by 3, then div by 3 ex: 126= 1+2+6=9/3 so 126/3
last 2 digits div by 4, then div by 4
end in 0 or 5, div by 5
div by 2 and 3, then div 6
sum of digits div by 9, then div by 9

plus, memorize the prime numbers, as many up to 100 as you can

Answer 12

ok its been a while since ive had to do this but that jolts the memory a bit. noe i've got another question regarding vectors, do you want that one here or should i post it

Answer 13

the angle