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Vlad [161]
3 years ago
7

Simplify 9 to the 2nd over 9 to the 7th.

Mathematics
2 answers:
Anestetic [448]3 years ago
5 0
81/4782969
9/531441
3/177146
1/59049
antiseptic1488 [7]3 years ago
4 0

Answer:

The simplified form of \frac{9^2}{9^7} is \frac{1}{9^5}.

Step-by-step explanation:

Consider the provided information.

9 to the 2nd over 9 to the 7th

This can be written as:

\frac{9^2}{9^7}

Use the quotient rule of exponent:

\frac{a^m}{a^n}=a^{m-n}

By using the above rule.

9^{2-7}

9^{-5}

Now use the negative exponent rule: a^{-n}=\frac{1}{a^n}

By using the above rule:

9^{-5}=\frac{1}{9^5}

Hence, the simplified form of \frac{9^2}{9^7} is \frac{1}{9^5}.

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Answer:

letter D is the correct answer here.

Step-by-step explanation:

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3 years ago
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Identify the coefficients, terms, like terms, and constants in
igor_vitrenko [27]

\huge\boxed{\sf{Hello. :D}}

The coefficient is a number before a variable.

Here, the coefficient is 9.

The like terms are any terms that have the same variable.

Here, 9k and -k are like terms, and 7 and 4 are like terms as well.

Combine like terms:

8k+3

The constants are: 7 and 4 (Constants are numbers in an expression or equation)

After combining like terms, the constant became

3

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8 0
2 years ago
About 10% of the human population is left-handed. Suppose a researcher speculates that artists are more likely to be left-handed
nevsk [136]

Answer:

Given the information in the question;

a) The parameter of interest is the population of artists who are left-handed and its is 10% = (10/1000 = 0.10

b) The Null hypothesis and alternative hypothesis are;

<em>H₀ : p </em>= 0.10

<em>H₁ : p</em> > 0.10

c) The sample proportion is calculated as:

p = number of left handed artist / sample size

p = 26 / 200

p = 0.13

d) To find the p-value, The researcher should calculate the probability that the sample proportion would be 0.13 or larger for a sample of size 200 if the population proportion is actually 0.10.

4 0
4 years ago
It takes your garden hose 19 seconds to fill your 2-gallon watering can. How long in hours will it take to fill a circular infla
Marrrta [24]

Answer:

Time taken to fill the pool = 7.81 hours

Step-by-step explanation:

We are given that it takes 19 seconds to fill 2 gallons. Therefore, we can use cross multiplication to know how long will it take to fill one gallon as follows :

Time taken to fill 2 gallons of tank = 19 seconds

\text{Time taken to fill 1 gallons of tank = }\frac{19}{2}\text{ = 9.5 seconds}

Therefore, it takes 9.5 seconds to fill one gallon of water.

One gallon is equivalent to 0.133681 cubic feet

Therefore, it takes 9.5 seconds to fill 0.133681 cubic feet

Now, to find Volume of the pool :

radius of pool = 6 ft

volume of pool = pi × (radius)² × height

volume of pool = 3.14 × 6² × 3.5 

volume of pool = 395.64 cubic feet

Time taken to fill 0.133681 cubic feet of water = 9.5 sec

\text{Time taken to fill 395.34 cubic feet of water = }\frac{9.5}{0.133681}\times 395.64\\\\\implies\bf\textbf{Time taken to fill the pool = 28116.04 seconds}=\frac{28116.04}{60\times 60}\text{ hours}\\\approx 7.81\textbf{ hours}

Hence, Time taken to fill the pool = 7.81 hours

8 0
4 years ago
Does anyone know 7.05% of $225.00?
vichka [17]

Convert the percent into a decimal by moving the decimal point 2 places to the left:

7.05% = 0.0705

Now multiply $225.00 by the decimal:

225.00 x 0.0705 = 15.8625 = $15.86

8 0
3 years ago
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