What are. the coordinates of the quadrilateral STUV when reflected over the X-axis. S(3,4), T(3,1), U(-2,1, V(-2,4) ​

Anyone know? will mark brainliest if you're correct!

What is the solution to the equation? k/6.4=8.7 2.3 5.568 15.1 55.68

A33 gram sample of a substance that's used to detect explosives has a k-value of 0.1473. n = noekt no = initial mass (at time t = 0) n = mass at time t k = a positive constant that depends on the substance itself and on the units used to measure time t = time, in days