3. The line passing through points \( P ( - 1,5 ) \) and \( Q ( a , 10 ) \) is parallel to a line with gradient 4. Find the value of \( a \) .
Pregunta
Answer
a = 1/4
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Find the solution of the exponential equation \( 16 e ^ { x } = 12 \) in terms of logarithms, or correct to four decimal places. \( x = \)
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Certain radioactive material decays in such a way that the mass remaining after \( t \) years is given by the function
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