If Point A located at (-3,6) is reflected across the y axis, and then across the x axis, where will Point A' be located?

(3.6)

Step-by-step explanation:

for this the y cordinates are the same while the x points are the opposite signs

Write an exponential function that models the decay of this material.
The material half-life is 37 days and the original mass is 477 kg. Using an=ao(r)^t the function made would be:
an=ao(r)^t
an=477(1/2)^(t/37)

After 6 days the amount would be: 
an=477(1/2)^(t/37)
an=477(1/2)^(6/37)
an=477(1/2)^(t/37)
an=477* 0.89368470454= 426.28kg