2 years ago

Calculate the % loss Cost price of an article =$28 Selling price of the article=$21

Mathematics

1 answer:

just olya [345]2 years ago

5 0

The % loss of your problem is 25%

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A radioactive substance decays exponentially. A scientist begins with 190 milligrams of a radioactive

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Answer: 65.1 (mg)

Step-by-step explanation:

$y=190*e^{-a*t}\\\\Calculate\ a:\\\\t=33,y=95(mg)\\\\190*e^{-a*33}=95\\\\e^{-a*33}=0.5\\\\-a*33=ln(0.5)\\\\a=\dfrac{ln(\dfrac{1}{2}) }{-33} \\\\a=0,02100... \approx{0.021}\\\\If\ t=51\ h, y=190*e^{-0.02100*51}=65.09167...\approx{65.1}$

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3 years ago

Determine the point on the hyperbola 3x^2−10y^2=20 closest to the point (0, -7).

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Step-by-step explanation:

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3 years ago

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FinnZ [79.3K]

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3 years ago

Read 2 more answers

757.923 expanded form

tamaranim1 [39]

The expanded form is adding all the digits so the answer is
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3 years ago

Can you help me pls, this doesn't make any sense

Gala2k [10]

Area of the larger square = 12² = 144 cm²
Area of the smaller square = 7² = 49 cm²
Area of the section = 144-49 = 95 cm²

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4 years ago