How much would Bryce’s down payment need to be if he wanted to get his monthly payments down to $2,500 or slightly under? i need help with all those questions

What is the upper quartile in the box plot?

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

Yvaries inversely as x. y =12 when x=5. find y when x=4