Could somebody give me a walkthrough for this problem?
The number of hours h needed to cook a pot roast that weighs p pounds can be approximated by using the formula h = 0.9p^0.6.
b. If pot roast A weighs twice as much as pot roast B, then roast A should be cooked for a period of time that is...
I'm homeschooled, but it's gotten to the point that my Mom doesn't know how to do what she's teaching me anymore. So now I'm teaching myself with just a textbook and no one to explain it to me. I'm stuck on an issue probably simple, but I still need help. I believe I messed up on the last lines...
I did this problem on paper but my calculator doesn't agree with the result. Can somebody tell me where I'm going wrong and how to do it right?
(7-sqrt3a)(7+sqrt3a)
= (7-sqrt3a)7+(7-sqrt3a)sqrt3a
= (7•7-7sqrt3a)+(7sqrt3a-sqrt3asqrt3a)
= 49-7sqrt3a+7sqrt3a-3a
= 49+3a-14sqrt3a
Even before I...