Search over 10,000 free study notes

Answers could include:Thinning of alveoli walls to reduce the size of the alveoli air sacsSacs lose their elasticity leading to a difficulty in expelling carbon dioxide and taking in oxygenDecrease in dif...

A strong introduction provides your examiner with a strong first impression. It introduces your writing style, and should establish the direction that your essay will take.

Begin by highlighti...

a) Using log rules, a^x=b becomes log(a)b=x. If we take ln of both sides, we get ln(e^(3x-9))=ln8. ln(e) =1, so we just get 3x-9=ln8. Now we can simply manipulate this to get x=(9+ln8)/3=3+(1/3)ln8. Anoth...

Start with a). Looking at this equation, the trig identity screaming out is cosx^2+sinx^2=1--> cosx^2=1-sinx^2. Substituting this into the LHS of the equation, and with a bit of algebraic rearrangement...

The key to solving simultaneous equations is trying to reduce them into one equation. You can see that one of these equations is quadratic, so you should be thinking there will be 2 answers for x and y. Y...