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Mathematics 19 Online
kristine16:

can someone explain exponential functions

luhivqqcherry:

Exponential functions are an essential concept in mathematics that captures the continuous growth or decay of a quantity over time. These functions play a crucial role in various disciplines, including economics, biology, physics, and finance. In this essay, we will explore the characteristics and applications of exponential functions, shedding light on their significance in the real world. To begin with, an exponential function is a mathematical expression of the form f(x) = a * b^x, where 'a' and 'b' are constants, and 'x' represents the independent variable. The base 'b' is a positive real number greater than one, which controls the rate of growth, while the constant 'a' determines the initial value or magnitude of the function. Exponential functions are different from linear functions as they have a constant ratio of output to input, resulting in rapid growth or decay.

luhivqqcherry:

Exponential functions also exhibit an intriguing property known as the "doubling time." The doubling time refers to the amount of time it takes for the initial quantity to double in value. It can be determined by solving the equation b^x = 2. By applying logarithms, we can find that the doubling time is equal to log2/log(b). This property is particularly useful in scenarios where exponential growth needs to be predicted or calculated, such as population growth, investment returns, or the spread of diseases.

kristine16:

can you help me with this word problem due to exponential functions The price of a new car depreciates 8% each year after its purchased. How much will a car cost after 10 years, if the initial price is $24,999

luhivqqcherry:

what are the choices?

kristine16:

its a word problem

luhivqqcherry:

ohhh so there arent any choices?

kristine16:

no

luhivqqcherry:

alr give me a second

kristine16:

these questions are going to be on my EOC in january and i really need to pass it

luhivqqcherry:

ohhh yess

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