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Seth was studying a population of fruit flies. The population, 
P, after 
t days of the study is modeled by the function 
P(t)=10e^(0.5 t).
What function could sech use to find 
D, the day the number of fruit flies reached a given value, 
p ?
A. 
D=(1)/(10)ln(2p)
B. 
D=(1)/(5)ln(b)
c. 
D=(1)/(2)ln(10 p)
D. 
D=2ln((p)/( 10))

ED=10 ln((p)/(2))

Seth was studying a population of fruit flies. The population, P P , after t t days of the study is modeled by the function P(t)=10e0.5t P(t)=10 e^{0.5 t} .\newlineWhat function could sech use to find D D , the day the number of fruit flies reached a given value, p p ?\newlineA. D=110ln(2p) D=\frac{1}{10} \ln (2 p) \newlineB. D=15ln(b) D=\frac{1}{5} \ln (b) \newlinec. D=12ln(10p) D=\frac{1}{2} \ln (10 p) \newlineD. D=2ln(p10) D=2 \ln \left(\frac{p}{10}\right) \newlineE.D=10ln(p2) E. D=10 \ln \left(\frac{p}{2}\right)

Full solution

Q. Seth was studying a population of fruit flies. The population, P P , after t t days of the study is modeled by the function P(t)=10e0.5t P(t)=10 e^{0.5 t} .\newlineWhat function could sech use to find D D , the day the number of fruit flies reached a given value, p p ?\newlineA. D=110ln(2p) D=\frac{1}{10} \ln (2 p) \newlineB. D=15ln(b) D=\frac{1}{5} \ln (b) \newlinec. D=12ln(10p) D=\frac{1}{2} \ln (10 p) \newlineD. D=2ln(p10) D=2 \ln \left(\frac{p}{10}\right) \newlineE.D=10ln(p2) E. D=10 \ln \left(\frac{p}{2}\right)
  1. Set Population Equation: Seth has the function P(t)=10e0.5tP(t) = 10e^{0.5t} which models the population of fruit flies after tt days. To find the day DD when the population reaches a given value pp, we need to solve for tt in terms of pp.
  2. Isolate Exponential Term: First, we set P(t)P(t) equal to pp to solve for tt.\newlinep=10e(0.5t)p = 10e^{(0.5t)}
  3. Take Natural Logarithm: Next, we divide both sides of the equation by 1010 to isolate the exponential term.\newlinep10=e0.5t\frac{p}{10} = e^{0.5t}
  4. Simplify Exponential Term: Now, we take the natural logarithm (ln\ln) of both sides to solve for tt. The natural logarithm is the inverse function of the exponential function, which allows us to solve for the exponent.\newlineln(p10)=ln(e0.5t)\ln(\frac{p}{10}) = \ln(e^{0.5t})
  5. Solve for tt: Using the property of logarithms that ln(ex)=x\ln(e^x) = x, we can simplify the right side of the equation.\newlineln(p10)=0.5t\ln(\frac{p}{10}) = 0.5t
  6. Express as Day D: Finally, we solve for tt by dividing both sides of the equation by 0.50.5.t=(2ln(p10))t = \left(2 \cdot \ln\left(\frac{p}{10}\right)\right)
  7. Express as Day D: Finally, we solve for tt by dividing both sides of the equation by 0.50.5.t=2ln(p10)0.5t = \frac{2 \cdot \ln(\frac{p}{10})}{0.5}We can now express tt as DD, the day the number of fruit flies reached the given value pp.D=2ln(p10)D = 2\ln(\frac{p}{10})

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