Given the following information, choose the brand that is the better buy.
brand a: $1.25 for 10 ounces
brand b: $1.47 for 12 ounces
brand c: $1.68 for 14 ounces
brand d: $1.84 for 16 ounces

If f(x)=3x+1 and f^-1=x-1/3, then f^-1(7)=

Simplify 15(x - 4)(x -1)-3(x + 4)(x - 1) with steps

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