Answer: c
Step-by-step explanation:
Heya!!!
Answer is...
15 numbers have 5 in them....
Numbers are....
5
15
25
35
45
50
51
52
53
54
55
56
57
58
59
HOPE IT HELPS YOU '_'
You cant solve but u can simplify which would be 2b=14
32^(2c)=8^(c)+7
2^10c=2^3c+21 im gonna assume 7 is in the exponent
10c=3c+21
7c=21
c=3