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Math Help - Test Thurs having probs with some review ?

  1. #1
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    Test Thurs having probs with some review ?

    Ok Im in business calculus and I have a test on thurs. Im having some probs on my review was wondering if someone could help me solve these. some seem easy I just cant figure them out maybe someone can show me an easy step
    1. BLAH BLAH type of products are given by S(t)=60-80e^-.1t where t represents time in years. Find the rate of cange i n sales at the time when t=3
    2. Diffrentiate
    Find f'(x) for f(x)= x/7x-5?
    3. Find f'(x) for f(x)8e^+4ln(x^3)
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  2. #2
    Super Member 11rdc11's Avatar
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    Quote Originally Posted by ls1ramair19 View Post
    Ok Im in business calculus and I have a test on thurs. Im having some probs on my review was wondering if someone could help me solve these. some seem easy I just cant figure them out maybe someone can show me an easy step
    1. BLAH BLAH type of products are given by S(t)=60-80e^-.1t where t represents time in years. Find the rate of cange i n sales at the time when t=3
    2. Diffrentiate
    Find f'(x) for f(x)= x/7x-5?
    3. Find f'(x) for f(x)8e^+4ln(x^3)
    S'(t) = -80(-.1)e^{-1.1t}

    S'(t) = \frac{8}{e^{1.1t}}
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