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3 years ago

How to find the percent of change of 37,065 to 26,102

Mathematics

2 answers:

Oxana [17]3 years ago

6 0

Answer:

70.42233122%

Step-by-step explanation:

A good way to do these is to make what you want to find in an English sentence. for example if you wanted to find out what 40% of 800 was, you'd say, "40% of 800 is...blank." For this problem, you would say, "26,102 is ___% of 37,065."

In these sentences, "of" indicates that you should multiply, "is" indicates that you should divide. Make sure you use the first of the two that comes in the sentence. For our 40% of 800 question, you would be multiplying because you used "of." DO NOT perform percentage operations without changing the percent to a decimal by dividing the percent by 100. So, we would get 0.4*800 which equals 320. Therefore, 320 is 40% of 800. Notice how "is" is used, and that 320/0.4=800.

Now for the real problem. 26,102 is ___% of 37,065. "is" is our first operation word, so we will be dividing. If the first operation word is between a value and a variable/blank, then skip it and go to the next value. So, 26,102/37,065 is our operation. We get 0.7042223122. Remember to multiply by 100 to get a percentage, so our final answer is ≈70.42%.

Vesnalui [34]3 years ago

4 0

Answer:

just subtract and u should get 10,963

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HELP!

olchik [2.2K]

C.35cm
Should be the right answer

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2 years ago

Two different radioactive isotopes decay to 10% of their respective original amounts. Isotope A does this in 33 days, while isot

Andrews [41]

Answer:

The approximate difference in the half-lives of the isotopes is 66 days.

Step-by-step explanation:

The decay of an isotope is represented by the following differential equation:

$\frac{dm}{dt} = -\frac{t}{\tau}$

Where:

$m$ - Current mass of the isotope, measured in kilograms.

$t$ - Time, measured in days.

$\tau$ - Time constant, measured in days.

The solution of the differential equation is:

$m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$

Where $m_{o}$ is the initial mass of the isotope, measure in kilograms.

Now, the time constant is cleared:

$\ln \frac{m(t)}{m_{o}} = -\frac{t}{\tau}$

$\tau = -\frac{t}{\ln \frac{m(t)}{m_{o}} }$

The half-life of a isotope ( $t_{1/2}$ ) as a function of time constant is:

$t_{1/2} = \tau \cdot \ln2$

$t_{1/2} = -\left(\frac{t}{\ln\frac{m(t)}{m_{o}} }\right) \cdot \ln 2$

The half-life difference between isotope B and isotope A is:

$\Delta t_{1/2} = \left| -\left(\frac{t_{A}}{\ln \frac{m_{A}(t)}{m_{o,A}} } \right)\cdot \ln 2+\left(\frac{t_{B}}{\ln \frac{m_{B}(t)}{m_{o,B}} } \right)\cdot \ln 2\right|$

If $\frac{m_{A}(t)}{m_{o,A}} = \frac{m_{B}(t)}{m_{o,B}} = 0.9$ , $t_{A} = 33\,days$ and $t_{B} = 43\,days$ , the difference in the half-lives of the isotopes is:

$\Delta t_{1/2} = \left|-\left(\frac{33\,days}{\ln 0.90} \right)\cdot \ln 2 + \left(\frac{43\,days}{\ln 0.90} \right)\cdot \ln 2\right|$

$\Delta t_{1/2} \approx 65.788\,days$

The approximate difference in the half-lives of the isotopes is 66 days.

4 0

3 years ago

Read 2 more answers

Help me quickkkk!!<br> A = 1/2(a+b)h solve for b

nasty-shy [4]

Answer:

2A/h - a = b

Step-by-step explanation:

Using A= 1/2(a+b)h

Divide both side by h

⇒A/h = 1/2(a + b)

Mutiply both sides by 2

⇒2A/h = a + b

Take the 2 over to the other side

2A/h - a = b

Keep in mind, that the (a) is not on the bottom, rather on its own

3 0

3 years ago

On interchanging two digits of the number 2643, it decreased by 180. Which two digits of 2643 might have been interchanged?

iris [78.8K]

Answer: D. 6 and 4

Explanation:

2643 - 180 = 2463 the 6 changes to a 4, and the 4 changes to a 6.

8 0

2 years ago

Which of the following compositions will map the red figure onto the blue figure?<br> 6lB<br> ATA

melisa1 [442]

Answer:

Point A is translated to A" by T(0, -6), since A has been shifted 6 units down

check the picture, the translated triangle is A"'B"'C"'.

clearly the angle between B"'A"' and B"A"' is 90 degrees, so we can complete the transformation by a 90° clockwise rotation or a 270° counterclockwise rotation.

from the choices given, we see that is is a 270° counterclockwise rotation.

Answer: A.(o,-6). Ra,270

Read more on Brainly.com - brainly.com/question/4238499#readmore

Step-by-step explanation:

7 0

3 years ago