PLEASE HELP ME FAST!The balance in two separate bank accounts grow each month at different rates. The growth rates for both accounts are represented by the functions f(x)=3^x and g(x)=5x+25. In what month is the f(x) balance greater than the g(x) balance? Show your work!βP.S Whoever gives me a good answer and shows their work I will make as Brainliest!
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Answer:From fourth month onwards, the growth rate of [tex]f(x)[/tex] is greater than that of [tex]g(x)[/tex].Step-by-step explanation:Given:The growth rates of both bank accounts are given as:[tex]f(x)=3^x\\g(x)=5x+25[/tex]Now, as per question, we need to find the value of 'x' when the value of [tex]f(x)>g(x)[/tex]. Or,[tex]3^x>5x+25[/tex]Now, we can do this by checking the values of 'x' by hit and trial method.Let [tex]x=1[/tex]. The inequality becomes:[tex]3^1>5(1)+25\\3>30(False)[/tex]Let [tex]x=2[/tex]. The inequality becomes:[tex]3^2>5(2)+25\\9>35(False)[/tex]Let [tex]x=3[/tex]. The inequality becomes:[tex]3^3>5(3)+25\\27>40(False)[/tex]Let [tex]x=4[/tex]. The inequality becomes:[tex]3^4>5(4)+25\\81>45(True)[/tex]Therefore, the value of 'x' for which [tex]f(x)>g(x)[/tex] is 4. So, from the fourth month onwards, the balance in [tex]f(x)[/tex] becomes greater than [tex]g(x)[/tex].The graphical solution is shown below to support the same. From the graph, we can conclude that after the 'x' value equals 3.4, the graph of [tex]f(x)[/tex] lies above of [tex]g(x)[/tex]. Hence, [tex]f(x)>g(x)[/tex] for [tex]x>3.4[/tex]
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10 months ago
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