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dem82 [27]
3 years ago
7

A certain forest covers an area of 2500 km2 . Suppose that each year this area decreases by 8.75% . What will the area be after

5 years? Use the calculator provided and round your answer to the nearest square kilometer.
Mathematics
1 answer:
jok3333 [9.3K]3 years ago
8 0
The answer to the question should be 1406.25
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Find the exact value of cos(sin^-1(-5/13))
son4ous [18]

bearing in mind that the hypotenuse is never negative, since it's just a distance unit, so if an angle has a sine ratio of -(5/13) the negative must be the numerator, namely -5/13.

\bf cos\left[ sin^{-1}\left( -\cfrac{5}{13} \right) \right] \\\\[-0.35em] ~\dotfill\\\\ \stackrel{\textit{then we can say that}~\hfill }{sin^{-1}\left( -\cfrac{5}{13} \right)\implies \theta }\qquad \qquad \stackrel{\textit{therefore then}~\hfill }{sin(\theta )=\cfrac{\stackrel{opposite}{-5}}{\stackrel{hypotenuse}{13}}}\impliedby \textit{let's find the \underline{adjacent}}

\bf \textit{using the pythagorean theorem} \\\\ c^2=a^2+b^2\implies \pm\sqrt{c^2-b^2}=a \qquad \begin{cases} c=hypotenuse\\ a=adjacent\\ b=opposite\\ \end{cases} \\\\\\ \pm\sqrt{13^2-(-5)^2}=a\implies \pm\sqrt{144}=a\implies \pm 12=a \\\\[-0.35em] ~\dotfill\\\\ cos\left[ sin^{-1}\left( -\cfrac{5}{13} \right) \right]\implies cos(\theta )=\cfrac{\stackrel{adjacent}{\pm 12}}{13}

le's bear in mind that the sine is negative on both the III and IV Quadrants, so both angles are feasible for this sine and therefore, for the III Quadrant we'd have a negative cosine, and for the IV Quadrant we'd have a positive cosine.

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3 years ago
On a science exam, Jackson scored 85 out of 100 possible points. There were 20 questions on the exam. Each question was worth th
d1i1m1o1n [39]
Do 85÷20 and then add it to 100
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expeople1 [14]

Answer: 15 times 12 i think maybe so 180

Step-by-step explanation:

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Step-by-step explanation:

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The graph shows f(x)and its transformation(x).
andre [41]

Using translation concepts, the equation for function g(x) given in the graph is:

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<h3>What is a translation?</h3>

A translation is represented by a change in the function graph, according to operations such as multiplication or sum/subtraction either in it’s definition or in it’s domain. Examples are shift left/right or bottom/up, vertical or horizontal stretching or compression, and reflections over the x-axis or the y-axis.

The parent function for this problem is given as follows:

f(x) = 2^x

From the graph, function g(x) was shifted 2 units left, hence x -> x + 2 and the definition is:

g(x) = 2^{x + 2}

More can be learned about translation concepts at brainly.com/question/28098112

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