Find the perimeter. Simplify the 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

How to write four times a number, minus 6,is equal to theee times the number+8 as an equqtion

Shannon drove for 540 minutes. if she traveled 65 miles per hour, how many total miles did she travel?