Friday
December 6, 2013

# Posts by marcus

Total # Posts: 208

physics
A weightlifter has a basal metabolic rate of 80.0 W. As he is working out, his metabolic rate increases by about 650 W. (a) How many hours does it take him to work off a 450-Calorie bagel if he stays in bed all day? (b) How long does it take him if he’s working out? (c) C...

precalculus
My book says a way for me to graph/plot points for my function is to write it in exponential form. For example. "Graph (fx)= log base 2(x-2) y=log base 2 (x-2) x-2=2^y x=2^y + 2 So now I can just plug any y value in to get my x value to graph my translated graph. So I was...

precalculus
When asked to sketch the graph of g(x)= -e^(x+1) +1, how do I turn this equation into exponential form? Or can I? I always get confused on what to do especially when I need to the x part of the equation out of the exponent.

precalculus
My book tells me to solve each exponential equation. I am given a lot of problems such as 6^x+1 = 4^2x-1 where I use In in the problem to help get my answer. However, in the same section, the book starts giving me problems such as 3(2)^x-2 +1=100 and .05(1.15)^x =5 etc. Where ...

precalculus
e^3x-7 x e^-2x =4e First step I get e^1x-7 =4e For the example in my book, the next step they divided by e. But I have no idea how to do this, or what involves?

precalculus
log_6(2x + 4)=2? 5 In x=10? log(x+25)=1+ log(2x-7)?

precalculus
No reason, basically the equation is supposed to read 3^log base 3^8?

precalculus
x= 3^log_3_^8 ? The log being in the exponent is throwing me off.

Precalculus
Solve (log x)^2 = log x Also, when will their be a possibility that an equation will have an extraneous solution? Like if you got two solutions for a log equation, will a negative solution for x automatically be extraneous?

Pre calculus
Okay, I'm really fuzzy about my log and exponential chapter. For example, solving some exponential equation such as e^3x-7 x e^-2x=4e I assume I start this equation by taking the natural log of both sides, but how will I know just by looking at an equation weather I need t...

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