The area of greenland is 840 000 square miles. what is this number in scientific notation

Answers

Answer 1
If you convert 840,000 to scientific notation; you would take 840,000 and divide it by 10^5 (ten to the fifth power) which is 100,000 and that would leave you with 8.4 divided 10^5. Remember scientific notation must be expressed as a number 1 through 9 but less than 10.
Answer 2

Scientific notations are the way through which a very small or a very large number can be written in shorthand. The area of Greenland in scientific notation is 8.4×10⁵ square miles.

What are Scientific notations?

Scientific notations are the way through which a very small or a very large number can be written in shorthand. In scientific notations when a number between 1 and 10s is multiplied by a power of 10.

For example, 6,500,000,000,000 can be written as 6.5e+12.

The given area of Greenland is 840,000 square miles. Therefore, the area of Greenland in scientific notation can be written as,

Area of Greenland = 840,000 square miles

                               = 8.4 × 10⁵ square miles

Hence, the area of Greenland in scientific notation is 8.4×10⁵ square miles.

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Related Questions

You are timing a kitchen floor that is 10 ft wide and 4 yd long. How many square yards of tile do you need?

Answers

1 yard = 3 ft

10/3 = 3 1/3 yards

3 1/3 x 4 = 13 1/3 square yards

A certain stock gained 5 points in one day and lost 4 points the next day. Which situation has the greater absolute value?Explain

Answers

Im not sure or stock meaning but if it's about banks then if it gets higher that means you toke money from it and at the next day you gave them back a value less what you took

Write the equation of the sphere in standard form. x2 + y2 + z2 + 4x − 6y − 6z = −6

Answers

hello : 
x2 + y2 + z2 + 4x − 6y − 6z = −6
(x²+4x) +(y² - 6y) +( z² -6z) = -6
((x² +4x +4) -4 ) + ((y² - 6y +9) - 9 ) + ((z² - 6z+9) -9 ) = - 6 
(x+2)² + (y - 3)² + ( z - 3)² = 4²...( standard form )
Final answer:

To put the given equation of a sphere in standard form, complete the square for x, y, and z, and combine constant terms on the right side. The standard form of the sphere's equation is (x + 2)2 + (y - 3)2 + (z - 3)2 = 28, with a center at (-2, 3, 3) and a radius of √28.

Explanation:

To write the equation of the sphere in standard form, we will complete the square for the x, y, and z terms in the given equation x2 + y2 + z2 + 4x − 6y − 6z = −6.

First, we organize the variables and separate the constants:

x2 + 4x + y2 - 6y + z2 - 6z = -6

We then complete the square for each variable by adding and subtracting the square of half the coefficient of the linear term:

x2 + 4x + 4 - 4 + y2 - 6y + 9 - 9 + z2 - 6z + 9 - 9 = -6

Now we can rewrite this as:

(x + 2)2 - 4 + (y - 3)2 - 9 + (z - 3)2 - 9 = -6

Combining the constant terms on the right side we get:

(x + 2)2 + (y - 3)2 + (z - 3)2 = 4 + 9 + 9 + 6

Which simplifies to:

(x + 2)2 + (y - 3)2 + (z - 3)2 = 28

The sphere's center is located at (-2, 3, 3) and has a radius of √28. In standard form, the equation of the sphere is:

(x + 2)2 + (y - 3)2 + (z - 3)2 = 28

The inequality of the most people that can be seated in the auditorium

Answers

Let x be the number of people that can be seated.

The value of x is some number 0 or greater, such that this number is a whole number (we can't have half a person). This means that [tex]x \ge 0[/tex] which is the same as saying [tex]0 \le x[/tex]

The instructions state that we can seat up to 1200 people. This is the max capacity. We can't go over this amount. So we will also have [tex]x \le 1200[/tex] indicating that x can be less than 1200 or equal to 1200.

So putting the two inequalities together, we get [tex]0 \le x \le 1200[/tex]

Note: if you haven't learned about compound inequalities yet, then the teacher may only want [tex]x \le 1200[/tex] as the answer.

5. A packet of razors and a bar of soap cost £5.50. If the soap costs £2.50 less than the razors, find the cost of each.

Answers

Let the cost of soap be x,
cost of razors = x + 2.5
total cost = 2x + 2.5
2x + 2.5 = 5.5
2x = 3
x = 1.5
cost of razors = 1.5 + 2.5
= 4

The cost of the packet of razors and bar of soap is £4.00 and £1.50 respectively.
R+s=5.5
R-s=2.5
Adding both
2r=8
R=4
S=5.5-4=1.5

find the circular cylinder of largest lateral area which can be inscribed in a sphere of radius R=4 feet

Answers

Let say radius is r 
its height is h 
its lateral area = y 
y = 2 pi r h 
since the cylinder is inscribed in the sphere 
So (2r )^2 + h^2 = 64 
then 4 (r^2) = 64 - h^2 
since y^2 = 4 (pi)^2 r^2 h^2 
then y^2 = (pi)^2 *h^2 * (64 -h^2) 
y^2 = 64 (pi)^2 * h^2 - (pi)^2 * h^4 
2 y y' = 128 (pi)^2 * h - 4 (pi)^2 * h^3 
putting y' = 0 
4 (pi)^2 h ( 32 - h^2)=0 
ether h = 0 testing this value (changing of the sign of y' before and after ) y is minimum 
or h = 4 sqrt(2) 
testing this value (changing of the sign of y' before and after ) y is maximum 
So the maximum value of y^2 = (pi)^2 *32 *( 64 - 32) 
y^2 = (pi)^2 * (32)^2 
y = 32 (pi) square feet

hope this helps

In march 1989 the exxon valdez ran aground and spilled 240,000 barrels of crude petroleum off the coast of alaska. one barrel of petroleum is equal to 42 gal. how many liters of petroleum were spilled?

Answers


240,000 barrels contain a total of:

240,000 barrels * 42 gal per barrel = 240,000*42 gal = 10,080,000 gal of petroleum.
------------------------------------------------------------------------------------------------
now we need to convert gallons to Liters. For this we use the conversion:

1 US liquid gallon = 3.78541 Litre, 

-------------------------------------------------------------------------------------------

thus 10,080,000 gal  are 10,080,000*3.78541 Litre = 38,156,932.8 Litre


Answer: 38,156,932.8 Litre

Ken says that 9,138 rounded to the nearest thousand is 9,100

Answers

it's stays the same so the answer is 9,138
That is incorrect ken rounded to the nearest hundred not thousand


Can the square root of 2 be written as an infinitely long fraction

Answers

No I believe it ends at 1.41421356237. unlike Pi that goes on forever

Write -38.375 as a mixed number in simplest form.

Answers

-38.375

-38 is ur whole number, it stays ur whole number.
.375....the last digit (5) is in the thousands place, so put it over 1000

-38 375/1000 which reduces to -38 3/8

What is the square root of 112 simplified?

Answers

lets look for  square numbers in the factors of 112:-

112 = 2*2*2*2*7

2*2*28" = 16  

so sqrt 112 = sqrt16 * sqrt7  =  4 sqrt7  answer

What value of c makes the statement true? -2x3(cx3 + x2) = -10x6 - 2x5

Answers

-2x^3(cx^3 + x^2) = -10x^6 - 2x^5

c would have to be 5....because -2x^3(5x^3) = -10x^6

Answer:  The required value of c that makes the given statement true is 5.

Step-by-step explanation:  We are given to find the value of c that makes the following statement TRUE :

[tex]-2x^3(cx^3+x^2)=-10x^6-2x^5~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~(i)[/tex]

To find the value of c, we need to equate the coefficients of the same powers of the unknown variable x.

From equation (i), we have

[tex]-2x^3(cx^3+x^2)=-10x^6-2x^5\\\\\Rightarrow -2cx^{3+3}-2x^{3+2}=-10x^6-2x^5\\\\\Rightarrow -2cx^6-2x^5=-10x^6-2x^5.[/tex]

Equating the coefficients of [tex]x^6[/tex] on both sides of the above equation, we get

[tex]-2c=-10\\\\\Rightarrow c=\dfrac{-10}{-2}\\\\\Rightarrow c=5.[/tex]

Thus, the required value of c that makes the given statement true is 5.

Toss a fair coin 10 times what is the probability of getting 7 heads

Answers

What is the probability that it lands on heads at least 7 times?
P(7<= x <=10) = 1 - binomcdf(10,0.5,6) = 0.1719

Please help with this! Thanks!

B: measure of BCD=45; acute
C: measure of BCD=90; right
D: measure of BCD=42; acute
E: measure of BCD=17; acute

Answers

3x-6 = 2x+11

3x = 2x+17

x = 17

3(17)-6 = 45

2(17)+11 = 45

45+45 = 90

answer is C 90 degrees:right

please round to the nearest tenth if possible.

Answers

[tex]\bf \cfrac{64~\underline{mi}}{\underline{hr}}\cdot \cfrac{\underline{hr}}{60~sec}\cdot \cfrac{5200~ft}{\underline{mi}}\implies \cfrac{64\cdot 5200~ft}{60~sec}\implies \cfrac{16640~ft}{3~sec} \\\\\\ \approx 5546.67\frac{ft}{sec}\\\\ -------------------------------\\\\ \cfrac{6000~\underline{lbs}}{\underline{day}}\cdot \cfrac{ton}{2000~\underline{lbs}}\cdot \cfrac{7~\underline{day}}{week}\implies \cfrac{6000\cdot 7~ton}{2000~week}\implies 21.00\frac{ton}{week}[/tex]

[tex]\bf -------------------------------\\\\ \cfrac{2~\underline{lbs}}{\underline{week}}\cdot \cfrac{16~oz}{\underline{lbs}}\cdot \cfrac{\underline{week}}{7~day}\implies \cfrac{2\cdot 16~oz}{7~day}\implies \cfrac{32~oz}{7~day}\approx 4.57\frac{oz}{day}[/tex]

The distribution of the time it takes for different people to solve a certain crossword puzzle is strongly skewed to the right, with a mean of 30 minutes and a standard deviation of 15 minutes. the distribution of z-scores for those times is

Answers

Answer: Skewed to right with mean 0 and S.D. 1 Explanation: Let's assume the z-scores as a linear transformation. then z=(x-mean)/S.D. = (x-30)/15 z(mean) = (30-30)/15= 0 z(sigma) = 15/15 = 1 Note: Shape does not change.
Final answer:

The distribution of the z-scores for the time it takes to solve a crossword puzzle that is strongly skewed to the right with a mean of 30 minutes and a standard deviation of 15 minutes can be calculated using the formula z=(x-mean)/standard deviation. Z-scores can be used to determine how far a data point is from the mean in terms of standard deviations.

Explanation:

The distribution of the time it takes for different people to solve a certain crossword puzzle is strongly skewed to the right, with a mean of 30 minutes and a standard deviation of 15 minutes. The distribution of z-scores for those times can be calculated using the formula:



z = (x - mean)/standard deviation



For example, if a person takes 45 minutes to solve the puzzle, the z-score would be:



z = (45 - 30)/15 = 1



This means that the person's time is one standard deviation above the mean.

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You have one liter of lemonade concentrate that contains 10% sugar. you pour one fourth of it into a pitcher and you add water to make the final volume one liter, what is the percentage of sugar in the new pitcher?

Answers

Originally:
Total liquid volume = 1 L
Sugar volume  = 10% of 1L = 0.1 L

Finally:
Sugar volume = (1/4) of 0.1 L = 0.025 L
Total liquid volume = 1 L
Percentage of sugar = 100*0.025 = 2.5%

Answer: 2.5%

The permiter of a triangle is 100 feet. the longest side is 3 feet less than twice the shortest side, and the third side is 7 feet longer than the shortest side. find the lengths of the sides of the triangle

Answers

let the shortest side be 's'
           longest side be ' l '
            and the third side be ' t'

P = s + l + t
P = 100

l - 3 = 2s
l = 2s + 3--- the longest side is 3 feet less than twice the shortest side

t= 7 + s ---- the third side is 7 feet longer than the shortest side

sub in (2s + 3) for l and (7 + s) for t

P = s + l + t
P = s + 2s + 3 + 7 + s
P = 100
100 = s + 2s + 3 + 7 + s
100 = 4s + 10
4s = 100 - 10
4s = 90
s = 90/4
s = 22.5

P = s + l + t
100 = 22.5 + l + t
100 - 22.5 = l + t
77.5 = l + t

from the previous equation we know l = 2s + 3
 we'll plug in l into 77.5 = l + t

77.5 = 2s + 3 + t
we know s = 22.5

77.5 = 2(22.5) + 3 + t
77.5 = 48 + t
t = 77.5 - 48
t = 29.5

l = 2s + 3
l = 2(22.5) + 3
l = 48


the lengths are 22.5, 29.5 and 48


A bank's monthly charge for maintaining an account is $.45 for each check written plus a service charge of $12.50. If x represents the number of checks written during the month, which function models this situation?

Answers

The function would be 12.50+.45x

Answer:

0.45x + 12.50

Step-by-step explanation:

What is the square root of 120 rounded to the nearest hundredths?

Answers

sqrt 120 rounded to the nearest hundredth = 10.95

Answer:

The value of the square root of 120 is 10.95

      What is square root ?

Square root of the number is the factor that we can multiply by itself to get that number .

     If square of a number is equal to another number than we can write

         m = n²

    And after taking root to both side

       √m = √n²

   We can cancel the square with root and

       √m = n

   We know the prime factor of 120

        120 = 2x2x2x3x5

   So the square root of 120 will be

       √(2x2x2x3x5)= 2 √(2x3x5)

                                = 2 √(30)

   And we know the value of √(30) = 5.477

     Root of 120 = 2x5.477

                           = 10.95

Hence , the square root of 120 is 10.95 .

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Is the remainder supposed to be this big of a number? Did I mess something up?

Answers

What math is this?...........
Assuming you got a remainder of 176, then you have the correct answer. Nice work. It's perfectly possible to get large values for a remainder.

Side Note: you also have the correct quotient as well

please help asap need for test
What is the m∠ABC?

m∠ABC = 15°
m∠ABC = 45°
m∠ABC = 60°
m∠ABC = 75°

Answers

m?ABC = 60° Looking at the diagram, you have triangle ABC. For m?BAC you are given a value of 75°, m?ACB is a supplementary angle to 135° which means it has a value of 180° - 135° = 45°. Finally, ?ABC is the 3rd angle of triangle ABC. Since all the angles in a triangle add up to 180°, you simply need to do the subtraction. 180° - 75° - 45° = 60° Therefore m?ABC = 60°

Answer:

60 my vros                

Step-by-step explanation:

Find the sum of the polynomials below: (7x8 + 3x - 3) + (4x8 + 2x + 5)

Answers

7x^8+3x-3
+4x^8+2x+5
=11x^8+5x+2

What is the rule about significant figures when multiplying and dividing measurements?

Answers

report answer to same amount of sig figs and the least # with least figures

ex -   587 x 45 = 26,415   --> 26,000 or 2.6 x 10^4 

Write the equation of the line that passes through (2, 4) and has a slope of –1 in point-slope form.
x – 4 = –1(y – 2)
x – 2 = –1(y – 4)
y – 2 = –1(x – 4)
y – 4 = –1(x – 2)

Answers

y - y1 = m (x - x1)

where m is the slope and (x1 , y1) is the point given

 

We are given:

m= -1

the point is (2, 4)


Then:

y - y1 = m (x - x1)
y-4 = (-1) (x-2)
y - 4 = -x + 2
y = -x +2 +4

y = -x + 6


Hope that helps you

jennifer earns $39 for 6 hours of babysitting.how much will she earn for 10 hours

Answers

find the unit rate.

39/6 = 6.5

$6.50 an hour

multiply this by ten to find the cost for 10 hours

$6.5 x 10 = $65

she will earn $65 in ten hours.
 hope this helps! :D

First find out how much she get paid per hour so to find that,  you would divide

39/6= $6.5 so she get paid $6.50

So just multiply 6.5 by 10 and you would get 65

So she will earn $65 in 10 hours

Write and solve an equation to solve the problem. Lisa is 4 centimeters taller than her friend Ian. Ian is 8 centimeters taller than Jim. Every month, their heights increase by 2 centimeters. In 4 months, the sum of Ian's and Jim's heights will be 140 centimeters more than Lisa's height. How tall is Ian now? Let h be Ian's height today in centimeters.
(h + 8) + (__) + 8 = ( __) + 8 + 140

Ian is __ centimeters tall now.

Answers

Let the actual heights of Lisa, Ian and Jim be L, I and J.

i) "Lisa is 4 centimeters taller than her friend Ian." means: L=4+I

ii) "Ian is 8 centimeters taller than Jim." means: I=8+J, thus J=I-8

so the heights of Lisa, Ian and Jim are  4+I, I and I-8, respectively.



Since their heights increase by 2 cm, in 4 months, their heights increase      2 cm*4 = 8 cm.

Thus, after 4 months the heights of Lisa, Ian and Jim become:

4+I +8, I+8 and I-8+8 that is  I + 12, I+8, I.


In 4 months, "
the sum of Ian's and Jim's heights will be 140 centimeters more than Lisa's height. " mean:

(I+8)+I=140+(I+12)

2I+8=152+I

I=152-8=144


This solution made use of writing all the ages in terms of Ians current age.

Josh wants to make a set of 12 ceramic cups. He figures he'll need 0.75 of a pound of clay for each cup. How many pounds of clay does Josh need in all?

A.) 8.4 pounds
B.) 9 pounds
C.) 12.75 pounds
D.) 16 pounds

Answers

multiply 12 x 0.75

12 x 0.75 = 9

answer is B. 9 pounds

Answer:

Josh will need 9 pounds Option B.

Step-by-step explanation:

Josh wants to make a set of 12 ceramic cups.

For each cup he will need 0.75 pound of clay

We have to calculate how many pounds of clay does Josh need for 12 ceramic cups. So we have to multiply 12 cups by 0.75.

for 12 cups he will need = 12 × 0.75 = 9 pounds.

Josh will need 9 pounds to make a set of 12 ceramic cups.

A teacher had $57.72 in his checking account. He made a deposit of $209.54. Then he wrote a check for $72.00 and another check for $27.50. What is the new balance in his checking account?

Answers

167.76 remaining in the account 

What is 1/12 (12-v)=1/6(v-6)

Answers

 Assuming you want to know the value of "[tex]v[/tex]" 

So, step one we would have solve from the same value 

[tex] \frac{1}{12}(12-v) = \frac{1}{6}(v-6)\\ \frac{1}{12}(12) + \frac{1}{12} (-v) = \frac{1}{6}(v)+ \frac{1}{6} (-6) \\ 1 + \frac{-1}{12}(v) = \frac{1}{6}v + -01 \\ \frac{-1}{12} (v) +1 = \frac{1}{6} - 1 [/tex]

Step two we have to subtract by [tex] \frac{1}{6}v[/tex] on each of your sides (so it can kind of be easier for you to solve) 


So,[tex] \frac{1}{6} v + 1 - \frac{1}{6}v = \frac{1}{6}v - 1 \frac{1}{6}v [/tex] 
You would have to cancel out the right side because it would give you a(n) answer of 1 

Now that we got those steps out of your way, let's subtract 1 to your sides that we're working with 

[tex] \frac{-1}{4}(v) +1 -1 \\ = -1 -1 [/tex]

Finally we're close to our answer for [tex]v[/tex]

[tex] \frac{-1}{4}(v)= 2 [/tex]

[tex] \frac{4}{1} ( \frac{-1}{4} )[/tex] cancel this out because it gives you one 

But, keep: [tex] \frac{4}{1} (-2)[/tex] because it gives you the answer

[tex]v = 8 [/tex]

Good luck on your assignment
and enjoy your day

~[tex]MeIsKaitlyn:)[/tex]
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