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3 years ago

Which graphs below represent an exponential function? Select all that apply.

Mathematics

2 answers:

Troyanec [42]3 years ago

8 0

The two graphs in the second picture are the graphs of exponential functions. You can detect it from the L shaped graphs.

The very first graph represents a linear function. A straight line always represents a linear function. In a Linear function, the change in the values of y is constant throughout in relative to change in x values.

The final graph represents a quadratic function rising on both ends.

Therefore, option b and c are the correct answers

SVETLANKA909090 [29]3 years ago

3 0

Answer with explanation:

We know that the graph of an exponential function is:

A non-linear curve which is either continuously increasing i.e. it represents a exponential growth function

or a non-linear curve which is continuously decreasing represent a exponential decay function.

( A linear function has a graph as a straight line such that the line could be constant or strictly increasing or decreasing.

Also, the graph of a quadratic function is a parabola which may open upward or downward)

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The table shows information about the numbers of hours 30 children spent on their tablets one evening. a) find the class interva

Bogdan [553]

Answer:

a) 20<h≤30.

b) 26.17 hrs

Step-by-step explanation:

The missing table is shown in attachment.

Part a)

We need to find the class interval that contains the median.

The total frequency is

$\sum \: f = 30$

The median class corresponds to half

$\frac{1}{2} \sum \: f ^{th} - - - value$

That is the 15th value.

We start adding the frequency from the top obtain the least cumulative frequency greater or equal to 15.

2+8+9=19

This corresponds to the class interval 20<h≤30.

Adding from the bottom also gives the same result.

Therefore the median class is 20<h≤30.

b) Since this is a grouped data we use the midpoint to represent the class.

The median is given by :

$\frac{\sum \: fx}{ \sum\: f}$

$= \frac{5 \times 3 + 15\times 8 + 25 \times 9 + 35 \times 7 + 45 \times 4}{30}$

$= \frac{785}{30}$

$= 26.17$

8 0

3 years ago

Read 2 more answers

I need help on this

Tanya [424]

Answer:

x = 20

Step-by-step explanation:

Please see the step-by-step solution in the picture attached below.

I hope this answer will help you. Have a nice day !

4 0

3 years ago

Sterling silver is an alloy of silver that is 92.5% pure silver. If x grams

nlexa [21]

Answer:

D. 0.925x + 0.88y = 0.91(x + y)

Step-by-step explanation:

The important point to remember is that the total mass of pure silver is the same on each side of the equation.

0.925x = mass of pure silver in first alloy

0.88 y = mass of pure silver in second alloy

The final alloy has a mass of (x + y) g and is 91 % pure silver, so

0.925x + 0.88y = 0.91(x + y)

5 0

3 years ago

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Which polynomial expression represents the area of the outermost square tile, shown below?

erastova [34]

Answer:

x² - 6x + 9

Step-by-step explanation:

(x - 3)² = x² - 6x + 9

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3 years ago

Does (-2)^n/( 3^n+1) converge or diverge?

hodyreva [135]

$\left|\dfrac{(-2)^n}{3^n+1}\right|=\dfrac{2^n}{3^n+1}$

As $n\to\infty$ , the sequence $a_n=\left(\dfrac23\right)^n$ converges to zero.

If you're talking about the infinite series

$\displaystyle\sum_{n\ge0}\dfrac{(-2)^n}{3^n+1}$

well we've shown by comparison that this series must also converge because we know any geometric series $\sum\limits_n r^n$ will converge as long as $|r|$ .

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3 years ago