Is y=7(2/3)^x exponential growth or exponential decay

Aboat costs 19200 and decreases in value by 12% per year. how much will it cost in 5 years

Miguel’s teacher asks him to color 4/8 of his grid. he must use 3 colors: red, blue, and green. there must be more green sections than red sections. how can miguel color all the sections of his grid to follow all the rules

In triangle △abc, ∠abc=90°, bh is an altitude. find the missing lengths. ah=4 and hc=1, find bh.