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2 years ago

93.34 divided by x = 18.69

Mathematics

1 answer:

jeka57 [31]2 years ago

3 0

Answer: 4.99 (answer would be 5 if rounded)

Step-by-step explanation:

93.34/18.69=x

x=4.99

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Max used 3 7/8 pounds of yellow potatoes and 2 5/8 pounds of sweet potatoes to make a potato salad. How many more pounds of yell

Talja [164]

Answer:

3 7/8-2 5/8

31-21

=10/8

=1 1/4 more

5 0

2 years ago

Read 2 more answers

the half life of c14 is 5730 years. Suppose that wood found at an archeological excavation site contains about 35% as much C14 a

Furkat [3]

Answer:

The wood was cut approximately 8679 years ago.

Step-by-step explanation:

At first we assume that examination occured in 2020. The decay of radioactive isotopes are represented by the following ordinary differential equation:

$\frac{dm}{dt} = -\frac{m}{\tau}$ (Eq. 1)

Where:

$\frac{dm}{dt}$ - First derivative of mass in time, measured in miligrams per year.

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

$m$ - Mass of the radioactive isotope, measured in miligrams.

Now we obtain the solution of this differential equation:

$\int {\frac{dm}{m} } = -\frac{1}{\tau}\int dt$

$\ln m = -\frac{1}{\tau} + C$

$m(t) = m_{o}\cdot e^{-\frac{t}{\tau} }$ (Eq. 2)

Where:

$m_{o}$ - Initial mass of isotope, measured in miligrams.

$t$ - Time, measured in years.

And time is cleared within the equation:

$t = -\tau \cdot \ln \left[\frac{m(t)}{m_{o}} \right]$

Then, time constant can be found as a function of half-life:

$\tau = \frac{t_{1/2}}{\ln 2}$ (Eq. 3)

If we know that $t_{1/2} = 5730\,yr$ and $\frac{m(t)}{m_{o}} = 0.35$ , then:

$\tau = \frac{5730\,yr}{\ln 2}$

$\tau \approx 8266.643\,yr$

$t = -(8266.643\,yr)\cdot \ln 0.35$

$t \approx 8678.505\,yr$

The wood was cut approximately 8679 years ago.

5 0

2 years ago

If the value of the blur radius is _____, no shadow will appear

vladimir1956 [14]

The value of the Blur radius is zero

Then no shadow will appear.

4 0

2 years ago

There were 567 children eating lunch there was 323 children drinking milk and 136 children drinking orange juice the rest of the

ahrayia [7]

Answer:

108 children were drinking apple juice. $432 were spent on pizza.

Step-by-step explanation:

How many children were drinking apple juice:

567 - 323 - 136 = 108

How many children were eating pizza:

108 * 2 = 216

How much was spent on pizza:

216 * $2 = $432

7 0

3 years ago

I need help please.

12345 [234]

-3x^2 X=4

4^2= 4x4=

16(-3)= -48

5 0

2 years ago