consider a polynomial ax^4-bx^2+x+5. suppose of a(-3)^4 - b(-3) + 5= 2. what is the numerical value of a(3)^4 + b(3) + 5
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Expert's answer
2013-02-26T11:05:55-0500
Suppose, the top of the light house is H metres high. The distance to the ship: L = H/tan(alpha) alpha - the angle of depression The speed of the ship equals: V = S/t = H( 1/tan(alpha1) - 1/tan(alpha2) ) /t In our case, alpha1= 30, alpha2 = 45 t = 10 minutes V = H( Sqrt[3] - 1)/ t the ship reach the light house after time: T = S/V = H/ (tan(alpha2) *V ) = H/V Therefore: T = t / ( Sqrt[3] - 1) = 10/( ( Sqrt[3] - 1) min = 13.66 minutes
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