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STatiana [176]
3 years ago
13

What is the scientific notation for 140000

Mathematics
1 answer:
vampirchik [111]3 years ago
6 0
You move the decimal point forward until it reaches the one so it looks like this:

1.4 x 10⁵ 

the exponent, 5, just tells you how many spaces the decimal point moved.
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Identify the property. ( x + y ) + z = x + ( y + z )
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Answer: Associative Property

Step-by-step explanation:

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3 years ago
Use the exponential decay​ model, Upper A equals Upper A 0 e Superscript kt​, to solve the following. The​ half-life of a certai
Akimi4 [234]

Answer:

It will take 7 years ( approx )

Step-by-step explanation:

Given equation that shows the amount of the substance after t years,

A=A_0 e^{kt}

Where,

A_0 = Initial amount of the substance,

If the half life of the substance is 19 years,

Then if t = 19, amount of the substance = \frac{A_0}{2},

i.e.

\frac{A_0}{2}=A_0 e^{19k}

\frac{1}{2} = e^{19k}

0.5 = e^{19k}

Taking ln both sides,

\ln(0.5) = \ln(e^{19k})

\ln(0.5) = 19k

\implies k = \frac{\ln(0.5)}{19}\approx -0.03648

Now, if the substance to decay to 78​% of its original​ amount,

Then A=78\% \text{ of }A_0 =\frac{78A_0}{100}=0.78 A_0

0.78 A_0=A_0 e^{-0.03648t}

0.78 = e^{-0.03648t}

Again taking ln both sides,

\ln(0.78) = -0.03648t

-0.24846=-0.03648t

\implies t = \frac{0.24846}{0.03648}=6.81085\approx 7

Hence, approximately the substance would be 78% of its initial value after 7 years.

5 0
2 years ago
What is the hypothesis of the following statement if a figure is a square,then it has four sides
Tanya [424]
Conditional statement 
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3 years ago
Write the linear inequatlity shown in the graph.The gray area represents the shaded region
MArishka [77]

In mathematics a linear inequality is an inequality which involves a linear function. A linear inequality contains one of the symbols of inequality: < is less than.

so the answer should be A.

5 0
3 years ago
The number of picces of art at the musem is shown in the table.
densk [106]

Answer:

<u>The solution is multiple:</u>

<u>A. 15 artists with 2 paintings per artist.</u>

<u>B. 10 artists with 3 painting per artist.</u>

<u>C. 6 artists with 5 painting per artist.</u>

<u>D. 5 artists with 6 paintings per artist.</u>

<u>E. 3 artists with 10 paintings per artist.</u>

<u>F. 2 artists with 15 paintings per artist.</u>

Statement and question complete:

The number of pieces of art at a museum is shown in the table.

Oil paintings 30

Photographs 24

Sketches 21.

The museum is hosting a show for July that features the oil paintings and each artist will show more than 1 painting. How many artists could be featured in the show?

Source: https://educationexpert.net/mathematics/929012.html

Step-by-step explanation:

x = Number of paintings per artist

y = Total number of paintings

x ≥ 2

xy = 30

<u>The solution is multiple:</u>

<u>A. 15 artists with 2 paintings per artist.</u>

<u>B. 10 artists with 3 painting per artist.</u>

<u>C. 6 artists with 5 painting per artist.</u>

<u>D. 5 artists with 6 paintings per artist.</u>

<u>E. 3 artists with 10 paintings per artist.</u>

<u>F. 2 artists with 15 paintings per artist.</u>

8 0
3 years ago
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