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Fiesta28 [93]
4 years ago
11

SOMEBODY HEEEEELLLLLLLLLPPPPPP ME WITH THIS PROBLEM!!What exponential function represents the data in the table?

Mathematics
2 answers:
ehidna [41]4 years ago
8 0

Answer:

The correct option is 4.

Step-by-step explanation:

It is given that the table represents an exponential function.

Let the exponential function is

f(x)=ab^x

From the table it is noticed that the function passing through the points (2,25), (3,125) and (4,625). It means the function must be satisfied by the points.

25=ab^2               .... (1)

125=ab^3             ..... (2)

Divide equation 2 by equation 1.

\frac{125}{25}=\frac{ab^3}{ab^2}

5=b

The value of b is 5. Put this value in equation (1).

25=a(5)^2

25=25a

Divide both sides by 25.

a=1

The required function is

f(x)=(1)(5)^x

Therefore the exponential function is f(x)=5^x. Option 4 is correct.

goldenfox [79]4 years ago
4 0
F(2)=25=5²
f(3)=125=5³
f(4)=625=55⁴
..............
So,
f(x)=(5^x)>>>>=required exponential function
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Preeta’s book has 300 pages. Each day she reads 10 more pages than the day before. She finishes her book in 6 days. How many pag
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Step-by-step explanation:

1. if the number of pages in the 1st day is 'x', then the 2d day - 'x+10', the 3d day - 'x+20', the 4th day - 'x+30', the 5th day - 'x+40' and the last day - 'x+50' pages;

2. if the sum of all the pages is 300, then it is possible to make up the equation:

x+x+10+x+20+x+30+x+40+x+50=300;

3. x=25, it means:

1st day - 25;

2d day - 35;

3d day - 45;

4th day - 55;

5th day - 65;

6th day - 75 pages.

3 0
2 years ago
5x + 900 = 1100<br> What is X?<br> My last question.
Elenna [48]

Answer:

x = 40

Step-by-step explanation:

5x + 900 = 1100

=> 5x = 1100 - 900

=> 5x = 200

=> x = 40

Hoped this helped.

8 0
2 years ago
Read 2 more answers
Can someone help me? I’ll mark you!
Vilka [71]

Answer: B

Step-by-step explanation:

Uh... nothing much to say for this one. When you divide with fractions, you always flip the second number. 1/2 flipped is 2/1, or 2. So the final problem is 50x2, which is 100. And yeah, that's all I have to say...

6 0
3 years ago
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Rewrite each expression so that each term is in the form kxn, where k is a real number, x is a positive real number,
MaRussiya [10]

Answer:

So the equation in standard form will be x^{\frac{-1}{3}}  

Step-by-step explanation:

We have given equation x^{\frac{-2}{3}}\times x^{\frac{1}{3}}

We have to write this expression in standard form

For writing in standard form first we have to do operation on the expression

We know that there is property of exponent that when two functions are multiplied with each other then there exponent are added

So x^{\frac{-2}{3}}\times x^{\frac{1}{3}}=x^{\frac{-2}{3}+\frac{1}{3}}=x^{\frac{-1}{3}}

So the equation in standard form will be x^{\frac{-1}{3}}

6 0
3 years ago
Burning coal yields about 30 x 106 joules of energy per kilogram of coal burned, but only 30% of that energy goed into electrici
abruzzese [7]

Answer:

Number of bulbs which can be lit using 1 kg of coal = 9

Step-by-step explanation:

Energy yielded by burning 1 kg of coal = 30 × 106 joules

                                                                = 3180 joules

Amount of energy that can be used for electricity = 30 % of 3180 joules

                                                                                   = 0.30 × 3180

                                                                                    = 954 joules

Energy needed for lighting one bulb = Wattage of bulb × No. of hours of lighting

⇒ Energy needed for lighting one bulb = 100 × 1

                                                                  = 100 joules

\text{Now, Number of bulbs which can be lit for one hour = }\frac{954}{100}\\\\\implies\bf\textbf{Number of bulbs = }9.54\approx 9

Hence, Number of bulbs which can be lit using 1 kg of coal = 9

4 0
4 years ago
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