Respuesta :

#4) 0.3r = 2.1
       0.3      0.3
r = 7. The answer is C
#5 Idk the answer.
I got 6 and it's not an answer choice.

Hope this helps :)
#4.) 0.3r/.3 = 2.1/.3
R=7
#5.) (3)4w = 2/3 (3)
12w = 2
12w/12 = 2/12
W = 2/12
So #4 is C and #5 is A