1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
mr_godi [17]
4 years ago
14

Mary simplified an expression and got 12.9x10^4 for her answer in scientific notation. Her friend, Angela, is telling her that h

er answer is incorrect. Why is Angela telling her she is incorrect? What is the correct way to write that number in scientific notation?
Mathematics
1 answer:
Novay_Z [31]4 years ago
8 0

<u>Answer:</u>

Mary simplified an expression. 1.29 \times 10^{5} is correct representation in scientific notation.

<u>Solution:</u>

Given that Mary simplified an expression and got 12.9 \times 10^{4} for answer in scientific notation.

According to Angela, answer is incorrect. Need to find reason why Angela consider 12.9 \times 10^{4} as incorrect scientific notation and find the correct answer.

Let’s understand what is scientific notation of any number.

Scientific notation is a way of representing number between 1 and 10 including 1 and excluding 10 multiplied by appropriate power of 10.

According to Mary’s simplification the number she is getting is 12.9 but in scientific notation, number must be in between 1 to 10

So 12.9 \times 10^{4} is not correct scientific notation.

\text { Let's rewrite } 12.9 \times 10^{4} \text { as } 1.29 \times 10^{1} \times 10^{4}=1.29 \times 10^{5}

Now we got 1.29 which is in between 1 and 10 multiplied by 10^5

Hence 1.29 \times 10^{5} is correct representation in scientific notation.

You might be interested in
Is the function f(x) = x + 3 linear or nonlinear?<br> linear<br> nonlinear
lord [1]

Answer:

It's linear!

Step-by-step explanation:

Just rewrite the equation as

y = x + 3

It has a slope and y-intercept, the most crucial parts that satisfy a linear equation. Since the slope is constant, it has to be linear.

tadah!

4 0
3 years ago
Read 2 more answers
8.
____ [38]

Answer:

y > -5x + 3

Step-by-step explanation:

Answer:

y > –5x + 3

Step-by-step explanation:

we know that

1) The solution of the inequality is the shaded area above the dashed line

so

The linear inequality could be

y > –5x – 3

y > –5x + 3

y > –3x + 5

2) The slope of the dashed line is negative ----> the three options have slope negative

3) The y-intercept of the dashed line is (0,3)

therefore

The linear inequality is

y > –5x + 3

...............................................................................................................................................

Answer:

Step-by-step explanation:

To find the linear inequality , Let pick two points from the graph

Lets pick (0,3) and (1,-2)

Lets find out slope using the points

Slope m= -5

y intercept b= 3

Equation of the line is y=mx+b

Now we look at the shaded part. we use test point (0,0)

(0,0) is not in the shaded region

0 >3 is false

4 0
3 years ago
Which of the following is true regarding the solutions to the logarithmic equation below? 2 log Subscript 6 Baseline (x) = 2. lo
Serggg [28]

Option c: x=6 is a true solution and x=-6 is an extraneous solution.

Explanation:

The equation is 2 \log _{6} x=2

Dividing both sides of the equation by 2, we get,

\frac{2 \log _{6}(x)}{2}=\frac{2}{2}

Simplifying,

\log _{6}(x)=1

Since, we know by the logarithmic definition, if \log _{a}(b)=c, then b=a^{c}

Using this definition, we have,

x=6^{1}

Hence, x=6

Now, let us verify if x=6 is the solution.

Substitute x=6 in the equation 2 \log _{6} x=2 to see whether both sides of the equation are true.

We have,

2 \log _{6}(6)

Using the log rule, \log _{a}(a)=1

We have,

2*1=2

Hence, both sides of the equation are equal.

Thus, x=6 is the true solution.

4 0
3 years ago
Read 2 more answers
Question 10 of 10
dangina [55]

Answer:

thanks for the points bye bye for now

Step-by-step explanation:

thanks for the points bye bye for now love u

3 0
3 years ago
I need help with number 43 and 44 please.
Vaselesa [24]

Answer 44 is the number 36

4 0
3 years ago
Other questions:
  • List ALL the numbered angles that are congruent to the given angle.
    12·1 answer
  • The slope of a line is 2/3. What is the slope of a line that is perpendicular to this line? Type a numerical answer in the space
    7·2 answers
  • Can someone help me with this !!!
    15·1 answer
  • Consider the function f(x) = 10(x2 – 7x). What are the additive and multiplicative inverses? its B The additive inverse is g(x)
    6·2 answers
  • Can someone help me with 26 and 27?
    8·1 answer
  • Find the area of the isosceles triangle.
    5·1 answer
  • Aaaaa!!! I could’ve dropped my croissant
    13·1 answer
  • Solve this equation for y. <br> 3x - 5y = 12
    10·1 answer
  • Find the value of x.<br> 31.7, 42.8, 26.4, x, mean 35
    9·1 answer
  • Find the value of 4^2+6^2<br>O 52 <br>O 20<br>O 100​
    15·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!