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musickatia [10]
2 years ago
7

A shirt originally cost $39.39, but it is on sale for $27.57. What is the percentage decrease of the price of the shirt?

Mathematics
1 answer:
IgorLugansk [536]2 years ago
3 0

30 percent decrease

Step-by-step explanation:

looking at this i know its a percent decrease

so how do we find percent decrease ?

first we subtract the first value 39.39 & the final value 27.57

39.39-27.57 = 11.82

then we divide 11.82 by the first value

like this 11.82÷39.39 = 0.3000

then we multiply what we got by 100

0.3000×100= 30 percent

the way that most people mess up is when they divide sometimes they might do 39.39 divided by 11.82 instead of 11.82÷39.39.

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\frac{d}{dx}x^n = nx^{n-1}

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Differentiating with respect to x,

\frac{dy}{dx}=8( x \times e^x + e^x) = 8(xe^x + e^x) = 8e^x(x+1)

2) y = 5x e^{x^4}

Differentiating w. r. t x,

\frac{dy}{dx}=5(x\times 4x^3 e^{x^4}+e^{x^4})=5e^{x^4}(4x^4+1)

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Differentiating w. r. t. x,

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7) w =\frac{2y + y^2}{7+y}

Differentiating w. r. t. y,

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