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Math Help - Writing expression

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    Smile Writing expression

    1. It is estimated that the Earth is losing 4000 species of plants and animals every year. If S represents the number of species living last year, how many species are on Earth this year?






    2. The kinetic energy of a particle of mass m is found by taking one-half of the product of the mass (m) and the square of the velocity (v). Write an expression for the kinetic energy of a particle.
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    Quote Originally Posted by Patience View Post
    1. It is estimated that the Earth is losing 4000 species of plants and animals every year. If S represents the number of species living last year, how many species are on Earth this year?
    If you have S species one year and lose 4000 species each year then you have S - 4000 species in the following year.


    Quote Originally Posted by Patience View Post
    2. The kinetic energy of a particle of mass m is found by taking one-half of the product of the mass (m) and the square of the velocity (v). Write an expression for the kinetic energy of a particle.
    K = (1/2)mv^2
    where K is the kinetic energy and v^2 is v times v.

    -Dan
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