Plz asap ill u back i promise

Number 18 should be h.

Idon’t know the answer to the first one but i do know the answer to the second one.
can you give me brainliest answer for you?
answer:
19. c
explanation:
in order to solve this question, you need to create a proportion.
first, add up all the marbles.
15+18+12+16+14=75
then, put the amount of yellow marbles over the total amount of marbles. now to find the percent.
do 12/75 = x/100
solve the proportion.
1200=75x
divide both sides by 75.
75 cancels out and you get the answer
16=x
16/100 is equivalent to 16%

811 cubic inches