Tvaries inversely as the square root of u.
t = 3 when u = 4.
find t when u = 49.

t =

Step-by-step explanation:

Given that t varies inversely as the square root of u then the equation relating them is

t = ← k is the constant of variation

To find k use the condition t = 3 when u = 4, thus

k = t = 3 × = 3 × 2 = 6

t = ← equation of variation

When u = 49, then

t = =

The length would be 9cm

Step-by-step explanation:

Because the perimeter is 76, you have to add 29 to 29 which equals 58, then you have to subtract 58 from 76, which is 18. The last episode is divide 18 by 2 because re are two sides remaining. So  answer would be 9. To check the answer you can add 29+29+9+9