The first one is d I believe and The second is B and C
I dont know the rest
To check, we can solve how much sunscreen is in a family sized bottle first. We need to find what is 20% of 12. First, turn 20% into a decimal: 20%/100= 0.2. Now, multiply 0.2 by 12, which is 2.4. Then, you add this to 12 because it is 20% more. 12+2.4= 14.4. Multiply this by 4: 14.4*4=57.6. Since his number is close to 50, he is kinda correct, but a much more reasonable answer would be closer to 60. Hope this helped!
The answer would be : 0.6875
Although if you want the simplified version, it would be : 0.69 or 0.688 depending on what unit you’d want it simplified to.