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zimovet [89]
3 years ago
9

Applying Properties of Exponents In Exercise,use the properties of exponents to simplify the expression.

Mathematics
1 answer:
Mkey [24]3 years ago
4 0

Answer:

1.~e^{-2} \\2.~e^{\frac{7}{2}}\\3.~e^8\\4.~e^{\frac{-11}{2}}

Step-by-step explanation:

We have to simplify the given exponential exponents.

Exponential Properties:

e^0 =1\\e^a.e^b = e^{a+b}\\\\\displaystyle\frac{e^a}{e^b} = e^{a-b}\\\\(e^a)^b = e^{ab}\\\\e^{-a} = \frac{1}{e^a}

Simplification takes place in the following manner:

a)

(e^{-3})^\frac{2}{3}\\(e^a)^b = e^{ab}\\=e^{-3\times \frac{2}{3}}\\=e^{-2}

b)

(e^4)(e^{\frac{-1}{2}})\\e^a.e^b = e^{a+b}\\=e^{(4+\frac{-1}{2})} \\= e^{\frac{7}{2}}

c)

(e^{-2})^{-4}\\(e^a)^b = e^{ab}\\= e^{-2\times -4}\\=e^8

d)

(e^{-4})(e^{\frac{-3}{2}})\\e^a.e^b = e^{a+b}\\=e^{(-4+\frac{-3}{2})} \\= e^{\frac{-11}{2}}

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andre [41]
Answer: Someone who walks 60 feet in ten seconds


Explaination: if you walk 25 feet per 5 seconds you would be walking 50 feet per 10 seconds
6 0
4 years ago
What is the value of this expression when a = 4, b = -5, and c = -7?
Ganezh [65]

Answer:

The value of the given expression is -878.08.

Step-by-step explanation:

Here, the given question is INCOMPLETE.

The complete question is:

Evaluate the expression for a = 4, b = -5, and c = -7. 4a^2b^{-2}c^3

Here, substitute the vale of a  = 4, b = -5 and c = -7, we get:

4a^2b^{-2}c^3  = (\frac{4a^2c^3}{b^2})  =  (\frac{4(4)^2(-7)^3}{(-5)^2})\\= (\frac{64 \times 343}{25})   =\frac{21,952}{25} =   878.08\\\implies 4a^2b^{-2}c^3 =   878.08 ( a = 4, b = -5 ,c = -7)

Hence, the value of the given expression is -878.08.

8 0
3 years ago
The function F is defined by F(x)= 12/x + 1/2 . Use this formula to find the following values of the function.
IgorLugansk [536]

Answer:

F(3)=\frac{9}{2} \\F(-12)=\frac{-1}{2} \\F(\frac{1}{3} )=\frac{73}{2} \\F(\frac{3}{4} )=\frac{33}{2}

Step-by-step explanation:

Given: F(x)= \frac{12}{x}  + \frac{1}{2}

To find: Values of the function F(3) , F(−12) , F(\frac{1}{3}), F(\frac{3}{4})

Solution:

A function is a relation in which each and every element of the domain has a unique image in the co-domain.

To find the values of the functions F(3),F(-12),F(\frac{1}{3} ),F(\frac{3}{4} ), put x=3, -12, \frac{1}{3},\frac{3}{4} in the given function F(x)= \frac{12}{x}  + \frac{1}{2}

F(x)= \frac{12}{x}  + \frac{1}{2}\\F(3)= \frac{12}{3}  + \frac{1}{2}\\=4  + \frac{1}{2}\\=\frac{9}{2}

F(x)= \frac{12}{x}  + \frac{1}{2}\\F(-12)= \frac{12}{-12}  + \frac{1}{2}\\=-1+\frac{1}{2}\\ =\frac{-1}{2}

F(x)= \frac{12}{x}  + \frac{1}{2}\\\\F(\frac{1}{3} )= \frac{12}{\frac{1}{3}}  + \frac{1}{2}\\=36+\frac{1}{2}\\ =\frac{73}{2}

F(x)= \frac{12}{x}  + \frac{1}{2}\\\\\\F(\frac{3}{4} )= \frac{12}{\frac{3}{4}}  + \frac{1}{2}\\\\=16+\frac{1}{2}\\ \\=\frac{33}{2}

8 0
3 years ago
Read 2 more answers
A random sample of 36 observations has been drawn from a normal distribution with mean 50 and standard deviation 12. Find the pr
Gre4nikov [31]

Answer:

z= \frac{47 -50}{\frac{12}{\sqrt{36}}}=-1.5

z= \frac{53 -50}{\frac{12}{\sqrt{36}}}=1.5

And using a calculator, excel ir the normal standard table we have that:

P(47 \leq \bar X \leq 53) =P(-1.5 \leq Z \leq 1.5)

And we can calculate the probability like this:P(-1.5 \leq Z \leq 1.5) = P(zStep-by-step explanation:

A random sample of 36 observations has been drawn from a normal distribution with mean 50 and standard deviation 12. Find the probability that the sample mean is in the interval 47<=X<53. Is the assumption of normality important. Why?

Previous concepts

Normal distribution, is a "probability distribution that is symmetric about the mean, showing that data near the mean are more frequent in occurrence than data far from the mean".

The Z-score is "a numerical measurement used in statistics of a value's relationship to the mean (average) of a group of values, measured in terms of standard deviations from the mean".  

Solution to the problem

Let X the random variable that represent the variable of interest of a population, and for this case we know the distribution for X is given by:

X \sim N(50,12)  

Where \mu=50 and \sigma=12

Since the distribution for X is normal then we know that the distribution for the sample mean \bar X is given by:

\bar X \sim N(\mu, \frac{\sigma}{\sqrt{n}})

We can find the probability required like this:

z= \frac{47 -50}{\frac{12}{\sqrt{36}}}=-1.5

z= \frac{53 -50}{\frac{12}{\sqrt{36}}}=1.5

And using a calculator, excel ir the normal standard table we have that:

P(47 \leq \bar X \leq 53) =P(-1.5 \leq Z \leq 1.5)

And we can calculate the probability like this:

P(-1.5 \leq Z \leq 1.5) = P(z

4 0
3 years ago
Which shape has no parallel sides?<br> rectangle<br> trapezoid<br> square<br> triangle
nadezda [96]

Answer:

Triangle

Step-by-step explanation:

all of them have parallel sides except triangle

5 0
3 years ago
Read 2 more answers
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