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Scuba Regulator, Diving Regulators And Equipment

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The percent of sunlight,s, that reaches a scuba diver under water can be modelled by the equation?

August 25, 2008 | By Admin In Mathematics |
scuba diver
Rr R asked:


………by the equation 0.8^d X 1000% where d is the depth of the diver, in metres

a) At what depth does 64% of sunlight reach the diver?
b) What percent of sunlight reaches the diver at a depth of 10 m, to the nearrest percent?

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1 Comment so far

  1. fount on August 27th, 2008

    a)
    S = .8^d * 1000%
    64% = .8^d * 1000%
    .064 = .8^d
    log .064 = d* log .8
    d = 12.32m

    b)
    S = .8^(10)*1000%
    s = .8^(10) * 1000%
    S = 1.0737
    S = 107% (which can’t possibly be right)

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