P(t)=25(2)1.06tThe number of yeast cells, P(t), in a culture after t days is modeled by the equation shown. After how many days will the population double in size?(Round your answer to the nearest hundredth.)
Q. P(t)=25(2)1.06tThe number of yeast cells, P(t), in a culture after t days is modeled by the equation shown. After how many days will the population double in size?(Round your answer to the nearest hundredth.)
Identify initial population and doubling condition: Identify the initial population and the condition for doubling.The initial population is given by P(0), which is 25 since t=0 makes the exponent zero, and 20=1. To double, the population needs to reach 2×25=50.
Set up equation for population doubling: Set up the equation to solve for the time when the population doubles.We need to find such that . So we set up the equation 505050 = 252525(222)^{\frac{t}{111.060606}}.
Isolate exponential part of the equation: Divide both sides of the equation by 252525 to isolate the exponential part.\newline5025=25(2)(t1.06)25\frac{50}{25} = \frac{25(2)^{\left(\frac{t}{1.06}\right)}}{25}2550=2525(2)(1.06t) simplifies to 2=2(t1.06)2 = 2^{\left(\frac{t}{1.06}\right)}2=2(1.06t).
Take logarithm of both sides: Take the logarithm of both sides to solve for ttt.\newlineUsing the property of logarithms that logb(ax)=xlogb(a)\log_b(a^x) = x \log_b(a)logb(ax)=xlogb(a), we apply the logarithm base 222 to both sides: log2(2)=log2(2(t1.06))\log_2(2) = \log_2(2^{(\frac{t}{1.06})})log2(2)=log2(2(1.06t)).
Simplify logarithmic equation: Simplify the logarithmic equation.\newlineSince log2(2)=1\log_2(2) = 1log2(2)=1, we have 1=t1.061 = \frac{t}{1.06}1=1.06t. Now we just need to solve for ttt.
Multiply both sides to find ttt: Multiply both sides by 1.061.061.06 to find the value of ttt.1×1.06=t1.06×1.061 \times 1.06 = \frac{t}{1.06} \times 1.061×1.06=1.06t×1.06 gives us t=1.06t = 1.06t=1.06.
Round answer to nearest hundredth: Round the answer to the nearest hundredth as instructed.\newlineThe value of ttt is already at the hundredth place, so rounding is not necessary. t=1.06t = 1.06t=1.06.
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