Respuesta :
Answer:
Step-by-step explanation:
Let:
Lala be l
Polina be P
Goffy be G
the respective ratio is 6:5:3
Given that Polina's loudness is 420 decibels then the total loudness will be calculated as follows:
Total ratio=6+5+3=14
hence total loudness will be:
14/5×420
=1,176 decibels
Answer: 252 decibels
given:
6:5:3 = ratio of L to P to G
P=90
one unit is 90/5 because the five represents a smaller version of 90
one unit = 18
answer=18(6+5+3)=252
brainliest please im sorry this one is late