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A new car is purchased for 22300 dollars. The value of the car depreciates at 7% per year. To the nearest tenth of a year, how long will it be until the value of the car is 8200 dollars? Answer:

A new car is purchased for 2230022300 dollars. The value of the car depreciates at 7% 7 \% per year. To the nearest tenth of a year, how long will it be until the value of the car is 82008200 dollars?\newlineAnswer:

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Each year, Francesca earns a salary that is 2% 2 \% higher than her previous year's salary. In her first 55 years at this job, she earned a total of $187,345 \$ 187,345 .\newlineWhat was Francesca's salary in her 1st  1^{\text {st }} year at this job?\newlineRound your final answer to the nearest thousand.\newlinedollars
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Posted 10 months ago

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The following formula gives the temperature's measure in degrees Fahrenheit F F , where C C is the measure in degrees Celsius:\newlineF=95C+32 F=\frac{9}{5} C+32 \newlineRearrange the formula to highlight the measure in degrees Celsius.\newlineC= C=
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Since 20102010, the town of Fall River has been experiencing a growth in population.\newlineThe relationship between the elapsed time, t t , in years, since 20102010 and the town's population, P(t) P(t) , is modeled by the following function.\newlineP(t)=36,800⋅2t25 P(t)=36,800 \cdot 2^{\frac{t}{25}} \newlineAccording to the model, what will the population of Fall River be in 20202020 ?\newlineRound your answer, if necessary, to the nearest whole number.\newlinepeople
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A huge ice glacier in the Himalayas initially covered an area of 4545 square kilometers. Because of changing weather patterns, this glacier begins to melt, and the area it covers begins to decrease exponentially.\newlineThe relationship between A A , the area of the glacier in square kilometers, and t t , the number of years the glacier has been melting, is modeled by the following equation.\newlineA=45e−0.05t A=45 e^{-0.05 t} \newlineHow many years will it take for the area of the glacier to decrease to 1515 square kilometers?\newlineGive an exact answer expressed as a natural logarithm.\newlineyears
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Posted 10 months ago

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Enzo is studying the black bear population at a large national park.\newlineHe finds that the relationship between the elapsed time t t , in years, since the beginning of the study, and the black bear population B(t) B(t) , in the park is modeled by the following function.\newlineB(t)=2500⋅20.01t B(t)=2500 \cdot 2^{0.01 t} \newlineAccording to the model, what will the black bear population be at that national park in 2525 years? Round your answer, if necessary, to the nearest whole number.\newlinebears
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Posted 10 months ago

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Find the following trigonometric values.\newlineExpress your answers exactly.\newlinecos⁡(150∘)=sin⁡(150∘)= \begin{array}{l} \cos \left(150^{\circ}\right)= \\ \sin \left(150^{\circ}\right)= \end{array}
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Posted 10 months ago

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Valeria is playing with her accordion.\newlineThe length of the accordion A(t) A(t) (in cm \mathrm{cm} ) after she starts playing as a function of time t t (in seconds) can be modeled by a sinusoidal expression of the form a⋅cos⁡(b⋅t)+d a \cdot \cos (b \cdot t)+d .\newlineAt t=0 t=0 , when she starts playing, the accordion is 15 cm 15 \mathrm{~cm} long, which is the shortest it gets. 11.55 seconds later the accordion is at its average length of 21 cm 21 \mathrm{~cm} .\newlineFind A(t) A(t) .\newlinet t should be in radians.\newlineA(t)=□ A(t)=\square
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Posted 10 months ago

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On the first day of spring, an entire field of flowering trees blossoms. The population of locusts consuming these flowers rapidly increases as the trees blossom. The locust population gains 87% 87 \% of its size every 22.44 days, and can be modeled by a function, L L , which depends on the amount of time, t t (in days).\newlineBefore the first day of spring, there were 11001100 locusts in the population.\newlineWrite a function that models the locust population t t days since the first day of spring.\newlineL(t)= L(t)=
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Posted 10 months ago

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Aleksandra started studying how the number of branches on her tree grows over time. Every 11.55 years, the number of branches increases by an addition of 27 \frac{2}{7} of the total number of branches. The number of branches can be modeled by a function, N N , which depends on the amount of time, t t (in years).\newlineWhen Aleksandra began the study, her tree had 5252 branches.\newlineWrite a function that models the number of branches t t years since Aleksandra began studying her tree.\newlineN(t)=□ N(t)=\square
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Posted 10 months ago

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Carbon−14-14 is an element which loses 110 \frac{1}{10} of its mass every 871871 years. The mass of a sample of carbon−14-14 can be modeled by a function, M M , which depends on its age, t t (in years).\newlineWe measure that the initial mass of a sample of carbon−14-14 is 960960 grams.\newlineWrite a function that models the mass of the carbon- 1414 sample remaining t t years since the initial measurement.\newlineM(t)= M(t)=
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