Answer:
s ≈ 6.17
Step by step solved:
To find the length of side s, we can use the law of cosines:
s^2 = t^2 + u^2 - 2tu cos(S)
where S is the angle opposite to side s.
Plugging in the given values, we get:
s^2 = 1.3^2 + 3.5^2 - 2(1.3)(3.5) cos(159°)
s^2 = 14.69 + 12.25 + 11.165
s^2 = 38.105
Taking the square root of both sides, we get:
s ≈ 6.17
Therefore, the length of side s to the nearest tenth of an inch is 6.2 inches.