Plz asap check if my answers are right plz!

Prove that 3: 8 is equivalent to 12: 32.a. use diagrams to support your answer.

Aproduction manager test 10 toothbrushes and finds that their mean lifetime is 450 hours. she then design sales package of this type of toothbrush. it states that the customers can expect the toothbrush to last approximately 460 hours. this is an example of what phase of inferential statistics

Which inequality statement describes the two numbers on a number line? "? 7 and a number 5 units to the right of ? 7"