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3 years ago

Need help on this.:(

Mathematics

1 answer:

kifflom [539]3 years ago

3 0

90°
This is because of the fact that a square always has four 90° angles

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Is the sum of two polynomials always a polynomial

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The sum of two polynomials (polynomial plus polynomial) will always result in another polynomial

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3 years ago

A pizza dlivery car can travel 11 km for every gallon of gasoline it uses. If the driver's average speed is 28 km/h, how many ho

Svetlanka [38]

Answer:

13.75 hours

Step-by-step explanation:

First, find how many km the driver can travel:

11(35)

= 385

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What the median number for 4, 8 10 5 9

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Actually, the median is not the same as the average.
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3 years ago

Read 2 more answers

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Mademuasel [1]

The equation that models the data on pandas is FV = 25(1.066)^t.

<h3>What models the data?
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The formula for calculating future value of the pandas is:

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2 years ago

A breeder reactor converts uranium-238 into an isotope of plutonium-239 at a rate proportional to the amount of uranium-238 pres

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where $k>0$ is constant. Separating variables and integrating both sides gives

$\dfrac{\mathrm dU}U=-k\,\mathrm dt\implies\ln|U|=-kt+C\implies U=Ce^{-kt}$

Suppose we start some amount $u$ . This means that at time $t=0$ we have $U(0)=u$ , so that

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We're given that after 10 years, 99.97% of the original amount of uranium remains. This means (if $t$ is taken to be in years) for some starting amount $u$ ,

$0.9997u=ue^{-10k}\implies k=-\dfrac{\ln(0.9997)}{10}$

The half-life is the time $t_{1/2}$ it takes for the starting amount $u$ to decay to half, $0.5u$ :

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or about 23,101 years. Notice that it doesn't matter what the actual starting amount is, the half-life is independent of that.

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3 years ago