Suppose that y varies directly with x , and =y24 when =x15 .
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The value of t is 6.65
<h3>What is exponential function?</h3>An exponential function is a mathematical function of the following form: f ( x ) = a^x. where x is a variable, and a is a constant called the base of the function.
Given:
A= 210 million
P= A e^(kt)
225 = 210 * e ^ (0.0069t)
225/210= e ^ (0.0069t)
1.07 = e ^ (0.0069t)
Taking log on both side
log 1.047 = 0.0069 t log e
t= log ( 1.047) / 0.0069
t= 6.65
Hence, value of t is 6.65.
Learn more about this exponential function here:
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