Can someone please answer these two questions? Isn't the first one's answer option A? I don't understand the second one. Please show steps

Answer:

Hanna converted the number:

0.00000305

to:

3.05x10^6.

Now, when we have:

Ax10^n

This will "move" the value of A n times to the left, adding zeros when the decimals of A run over.

if we have

Ax10^-n

This will move A n times to the right.

Then the number:

3.05x10^6 = 3050000

This is clearly not the number that Hannah wanted to write.

The problem is that the exponent should be negative, if we have instead:

3.05x10^-6

We move our number 6 times to the right, adding zeros when necessary.

3.05x10^-6 = 0.00000305.

So Hannah is incorrect, she should wrote 0.00000305 = 3.05x10^-6

Answer: D. Hannah is not correct because the exponent should be -6.

Hope this helps!

Answer:

18x+21

Step-by-step explanation:

First multiply each equation by 2 since there is 2 sides for both the length and width.

2(2x+3)   2(7x+9)

4x+3         14x+18    

Then combine like terms

4x+14x       3+18

18x              21

Answer:

Step-by-step explanation:

8x + 11 = 12x -1

-4x + 11 = -1

-4x = -12

x = 3

Answer:

[tex] - 3( - 10) \\ = + 30[/tex]

Step-by-step explanation:

- and - =+

that's why when we multiply -3 with -10 then product is positive i.e +30

hope it helped you:)

thanks!

Answer:

The number is:

-8

Step-by-step explanation:

2(a/2 + 6 ) = 4

2*a/2 + 2*6 = 4

2a/2 + 12 = 4

a + 12 = 4

a = 4-12

a = -8

Check:

2(-8/2 + 6) = 4

2(-4+6) = 4

2*2 = 4

Answer:

I disagree with Frank

Answer:

Disagree

Step-by-step explanation:

Remember to follow the order of PEMDAS.

PEMDAS =

Parenthesis

Exponents (& Roots)

Multiplication

Division

Addition

Subtraction.

In this case, the first step should be to solve for [tex]10^{4}[/tex].

[tex]10^4 = 10 * 10 * 10 * 10 = 10,000[/tex]

Next, multiply by 8:

[tex]10,000 * 8 = 80,000[/tex]

80,000 is your answer, so I disagree.

~

Answer:

The correct answer is "B"

Step-by-step explanation:

m=-1/4

Hope this help!

have a nice day!

Answer:

B

Step-by-step explanation:

So we have the equation:

[tex]\frac{3m-3}{5}=\frac{2m-1}{2}[/tex]

First, let's get rid of the fractions. Multiply both sides by the LCM of 5 and 2, which is 10:

[tex]10(\frac{3m-3}{5})=10(\frac{2m-1}{2})[/tex]

On the left, the 10 gets reduced to 2. On the right, the 10 gets reduced to 5. Thus:

[tex]2(3m-3)=5(2m-1)[/tex]

Distribute:

[tex]6m-6=10m-5[/tex]

Subtract 6m from both sides:

[tex]-6=4m-5[/tex]

Add 5 to both sides:

[tex]-1=4m[/tex]

Divide both sides by 4:

[tex]m=-\frac{1}{4}[/tex]

And we're done!

The answer is B.

20 - 2t = (1/2)t + 28

- 2.5 = 8

t= - 3.2

Answer:

3n+7=16;n=3

20-2t=

Step-by-step explanation:

I just did it

Answer:

15

Step-by-step explanation:

pretty sure bc they are supposed to be the same/ a reflection of each other and 4 times 15 is 60

Answer:

The answer would be C, since numerical expressions only contain numbers.

Answer:

The answer is A even though variables are letters they are not symbols like %,$,# etc. All the other ones are correct besides C. Hope this helps

Step-by-step explanation:

Answer:

14 prisms can be accomodated

Their total volume would be 504 in³

Step-by-step explanation:

First, we have to figure out the angle at the vertex.  For that, we need the Law of cosines. c²=a²+b²-2ab*cos(c)

4²=9²+9²-2(9)(9)cos(c)

16=81+81-162cos(c)

16-81-81=-162cos(c)

-142=-162cos(c)

-142/-162=cos(c)

.9=cos(c)

use the inverse

cos^-1(.9)=c

25.8=c

Now that we know c=25.8, we can figure out how many cheese wedges there would be in the circle.

36÷25.8=14

Now we figure out volume.

1/2(9)(4)(2)=36 in³

The total volume would be

14x36=504 in³

Answer:

3/16 miles/minute

Step-by-step explanation:

A rate of change describes how an output quantity changes relative to the change in the input quantity.

Points given:

Input        Output

  2            1/6

  3          17/48

  4          13/24

  5          35/48

  6          11/12

Here input values describe the time in minutes from 2 to 6 and output values describe the distance in miles from 1/6 to 11/12

Calculating the rate of change using the first two pairs of input-output values

We will get the same result if we take any other ordered pair of input and output values.

Answer:

it is 3/16 miles per minute

Step-by-step explanation:

...

I'm going to assume that you are asking how deep he jumped. He jumped from 4 feet high into a 1 foot deep hole, so, we need to add.

4 + 1 = 5

Therefore, Jose jumped a total of 5 feet.

Best of Luck!

Answer:

Subtraction Property of Equality to subtract 6 from both sides

Step-by-step explanation:

By subtracting, you cancel out 6 on the left and you move the constant over to 40. 17h = 34

Answer:

-8.0625

Step-by-step explanation:

Answer:

-8.0625 as the decimal

Answer:

420:280

Step-by-step explanation:

first you add 3:2 up which comes to 5.

700 divided by 5 = 140.

3:2 means that 3 will get 3 lots of 140 and 2 will get 2 lots of 140.

3x140= 420.

2x140= 280

the ratio is 420:280

Answer:

Step-by-step explanation:

Function to be graphed is,

h(x) = 2(x - 3)²

Function 'h' is a quadratic function.

Since, the coefficient of the leading term (term with the highest power) is positive, parabola will open upwards.

Both the ends of the parabola will be upwards (towards positive infinity).

As x approaches to negative infinity, h(x) approaches to positive infinity.

As x approaches to positive infinity, h(x) approaches to positive infinity.

A) As x approaches negative infinity, h(x) approaches positive infinity.

B ) As x approaches positive infinity, h(x) approaches positive infinity.

A function is defined as the expression that set up the relationship between the dependent variable and independent variable.

Function to be graphed is,

h(x) = 2(x - 3)²

Function 'h' is a quadratic function.

Since the coefficient of the leading term (a term with the highest power) is positive, the parabola will open upwards.

Both the ends of the parabola will be upwards (towards positive infinity).

Therefore As x approaches negative infinity, h(x) approaches to positive infinity. As x approaches positive infinity, h(x) approaches to positive infinity.

To know more about function follow

https://brainly.com/question/25638609

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Answer: x > 38

Step-by-step explanation:

Easy

Da'Quan must read more than 38 pages each night.

Inequality is defined as the relation which makes a non-equal comparison between two given functions.

The Number of pages in the Quran = 532

The Number of nights in a week = 7

Target is to read more than half by the end of the first week

In other to meet up, Let number of pages to be read per night = r

Hence, the equality goes ;

Pages read per night × 7 > pages of the Quran / 2

7× r > 532 / 2

7r > 266

r > 266/7

r > 38

Hence, Da'Quan must read more than 38 pages each night.

Learn more about inequality ;

brainly.com/question/14164153

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Answer:

C(x) = (x-5)^2 + 2

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

Answer

[tex]5+2\sqrt{x} 13​=12.211[/tex]  or 5−2  this is where the  square root would go 13​=−2.211

Step-by-step explanation:

1.1     Factoring  x2-10x-27

The first term is,  x2  its coefficient is  1 .

The middle term is,  -10x  its coefficient is  -10 .

The last term, "the constant", is  -27

Step-1 : Multiply the coefficient of the first term by the constant   1 • -27 = -27

Step-2 : Find two factors of  -27  whose sum equals the coefficient of the middle term, which is   -10 .

     -27    +    1    =    -26

     -9    +    3    =    -6

     -3    +    9    =    6

     -1    +    27    =    26

Observation : No two such factors can be found !!

Conclusion : Trinomial can not be factored

2.1      Find the Vertex of   y = x2-10x-27

Parabolas have a highest or a lowest point called the Vertex .   Our parabola opens up and accordingly has a lowest point (AKA absolute minimum) .   We know this even before plotting  "y"  because the coefficient of the first term, 1 , is positive (greater than zero).

Each parabola has a vertical line of symmetry that passes through its vertex. Because of this symmetry, the line of symmetry would, for example, pass through the midpoint of the two  x -intercepts (roots or solutions) of the parabola. That is, if the parabola has indeed two real solutions.

Parabolas can model many real life situations, such as the height above ground, of an object thrown upward, after some period of time. The vertex of the parabola can provide us with information, such as the maximum height that object, thrown upwards, can reach. For this reason we want to be able to find the coordinates of the vertex.

For any parabola,Ax2+Bx+C,the  x -coordinate of the vertex is given by  -B/(2A) . In our case the  x  coordinate is   5.0000  

Plugging into the parabola formula   5.0000  for  x  we can calculate the  y -coordinate :

 y = 1.0 * 5.00 * 5.00 - 10.0 * 5.00 - 27.0

or   y = -52.000

Answer:

D: 81

Step-by-step explanation:

3*3=9

9*3=27

27*3=81

Answer:

the answer is 81

Step-by-step explanation:

3×3 3×3

∨    ∨

9   ×   9

     ∨

     81

hope this helped!!! :)

Answer:

Donna spent 80% on fruit.

Step-by-step explanation:

First, we know that she spent $64 on fruit. We also know that she spent a total of $80. Then, we take 64/80. This gives us 0.8. Move the decimal two to the right and you have the percentage, 80%.

Answer:

After returning to the United States he converts his money back to US dollars. How much of the original 250 US dollars does Phelan now have? A. 44.70 US dollars.

Answer:

70.01.

Step-by-step explanation:

159 - 88.99

= 159 - 90 + 1.01

= 69 + 1.01

= 70.01.

Answer:

N=-22

Step-by-step explanation:

We first highlight all the information that is important and make an equation based on that. From that, we get 6(N+15)=-42. From there, we divide both sides by 6 to get N+15=-7. We subtract 15 from both sides to get N =-22, which is our answer.

Answer:

Elena needs to sell 60 tickets

Answer:

Elena must sell 90 tickets to earn $900

Step-by-step explanation:

Divide the total money needed by how much each ticket costs:

900 ÷ 10 = 90

If you're talking about how many more tickets are needed:

Subtract the total tickets needed by how many tickets Elena already sold

90 - 30 = 60 more tickets needed

I hope this helped!

Answer:

40 degrees

Step-by-step explanation:

Angle ACO = 80 ( 180 - 100)

Angle CAO = 60 (180 - 120)

Angle AOC = 40 (180 - 80 - 60) (TOTAL DEGREES OF A TRIANGLE IS 180)

Answer: Translation

Step-by-step explanation: One-to-one correspondence between two sets of points.

Answer:

Protons and neutrons each count for one AMU, and the electron counts for zero AMU. So, if the atomic mass of oxygen is 16, that means we have a total of 16 protons and neutrons. 16 total protons and neutrons minus 8 protons leaves us with 8 neutrons.