2 years ago

What is the area of a rectangle if the length is 12 cm and the width is 7 cm?

Mathematics

2 answers:

Zepler [3.9K]2 years ago

8 0

Answer:

Step-by-step explanation:

you would multiply the length versus the width

frozen [14]2 years ago

8 0

Answer:

12×7==========N

Step-by-step explanation:

12×7=84, cause the formula of looking for the area is A=L×W

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Step-by-step explanation:

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y = 29.4/1.75

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Determining Exponential Growth and Decay in Exercise, use the given information to write an exponential equation for y. Does the

scZoUnD [109]

Answer:

$y=20e^{-\frac{2}{3}t}$

Exponential decay

Step-by-step explanation:

We are given that

$\frac{dy}{dt}=-\frac{2}{3}y$

y=20 when t=0

$\frac{dy}{y}=-\frac{2}{3}dt$

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$lny=-\frac{2}{3}t+C$

Using formula $\int \frac{dx}{x}=lnx,\int dx=x$

$y=e^{-\frac{2}{3}t+C}$

Using formula

$lnx=y\implies x=e^y$

$y=e^C\cdot e^{-\frac{2}{3}t}$

$e^C=Constant=C$

$y=Ce^{-\frac{2}{3}t}$

Substitute y=20 and t=0

$20=C$

Substitute the value of C

$y=20e^{-\frac{2}{3}t}$

When t tends to infinity then

$\lim_{t\rightarrow\infty}=\lim_{t\rightarrow\infty}20e^{-\frac{2}{3}t}=0$

When time increases then the value of function decrease

Hence, the function is exponential decay.

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3 years ago