Questions on Algebra: Decimal numbers, power of 10, rounding answered by real tutors!

Algebra ->  Algebra  -> Decimal-numbers -> Questions on Algebra: Decimal numbers, power of 10, rounding answered by real tutors!      Log On

Ad: Algebrator™ solves your algebra problems and provides step-by-step explanations!
Ad: Algebra Solved!™: algebra software solves algebra homework problems with step-by-step help!

   


Tutors Answer Your Questions about decimal-numbers (FREE)


Question 663081: The number of state and federal inmates in millions in year x which >2002 can be approximated by the following formula N=0.04x-79.06
Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
Please repost with and include a question :)


Question 667946: how do you work out decimal in tenths and hundreths
Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
please repost with a specific question :)


Question 702825: scientific notation and significant figures
(4.4 * 10 -2) / (3.409 * 10 -7) =
(8.2 * 10 -3) / (1.10 * 10 -2) =

Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
I'll do the first...



which simplifies to
%0D%0A1.290701x10%5E5%0D%0A


Question 722386: 3/4w-1/2w-4=14
Answer by tommyt3rd(606) About Me  (Show Source):

Question 747301: What is 659.1649 rounded to the nearest tenth?
Answer by stanbon(57377) About Me  (Show Source):
You can put this solution on YOUR website!
What is 659.1649 rounded to the nearest tenth?
----
Ans: 659.2
=============
Cheers,
Stan H.
===========


Question 688618: What is the solution to 11 7/8% to a decimal
Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
%0D%0A%0D%0A11%267%2F8=11.875%0D%0A%0D%0A
so as a decimal we can write: 0.11875


Question 647703: How do you write 133.4 million as a decimal?
Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
133.4 million is 133,400,000.0


Question 663159: how do i solve 374+526 using the 8 base number systems?

Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
adding the first digits we get
1's place: 4+6 which is 12 in base 8 so we carry the 1 and keep the 2
for 8's place: 7+2+1 which again is 12 in base 8
for 64's place: 3+5+1 which is 11 in base 8
so our number is:
1122 in base 8

:)


Question 694206: how should math read 1.08+1.2
Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
If you mean what is the sum, then 1.08+1.2=2.28


Question 686412: Could someone please help me?
Express in decimal notation.
8.29* 10^-4

Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
8.29* 10^-4=8.29*0.0001=0.000829


Question 714636: Azelea plants at Fred's are priced at 5 for $1.25. how much will you pay for 18 azalea plants at Fred's?
Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
let's solve as a proportion:

%0D%0A%0D%0A%281.25%29%2F5=x%2F18%0D%0A

multiplying by 18 then simplifying...
x=$4.5


Question 744039: give a rough estimate (by rounding off to nearest hundreds) and also a closer estimate (by rounding off to nearest tens)of the following
439+334+4317?

Answer by tommyt3rd(606) About Me  (Show Source):
You can put this solution on YOUR website!
a)
400+300+4300=5000

b)
440+330+4320=5090


Question 744856: write in decimal : seven tens and four hundredths
Answer by ohtheirony(35) About Me  (Show Source):

Question 744081: give a rough estimate (by rounding off to nearest hundreds)and also a closer estimate (by rounding off to nearest tens)of the following:
439+334+4317?

Answer by josgarithmetic(1530) About Me  (Show Source):
You can put this solution on YOUR website!
439+334+4317

Nearest hundreds, 400 + 300 + 4300;
Easy to do in your head? 5000?


Question 740967: OK, THIS IS MY SECOND TIME ASKING THIS QUESTION TO YOU TUTORS!!! NOBODY STILL HASN'T HELPED ME WITH THIS PROBLEM!!! SERIOUSLY, I NEED HELP!!! I DON'T HAVE ANY MONEY TO DOWNLOAD OTHER ONLINE TUTORIALS!!
Four students are about to purchase concert tickets for $18.50. For each ticket, they discovered that they may purchase a block of 5 tickets for $80.00. How much would each of the 4 save if they can get a fifth person to join them and the 5 people equally divide the price of the 5-ticket block? WHAT IS THE ANSWER?!

Found 2 solutions by Alan3354, rothauserc:
Answer by Alan3354(30993) About Me  (Show Source):
You can put this solution on YOUR website!
wow, you had to enter it 2 times?
What makes you think we're obligated to do anything for you?
What effort did you make? I'm guessing none, just whining.

Answer by rothauserc(210) About Me  (Show Source):
You can put this solution on YOUR website!
We are given
Four students are about to purchase concert tickets for $18.50. For each ticket, they discovered that they may purchase a block of 5 tickets for $80.00.
Each ticket costs $18.50 for each student. Now, if the four students get a fifth and they each share the cost of $80 for five. then $80/5 = $16.
Therefore each student would save $2.50.


Question 741017: LA= 1/2(36)(3√5)
can you please help and explain to me how to solve this? Thanks
Monika

Answer by rothauserc(210) About Me  (Show Source):
You can put this solution on YOUR website!
We are given:
LA= 1/2(36)(3√5)
divide 36 by 2 and we get
LA=18(3sqrt(5))
multiply 18*3 and we get
LA=54sqrt(5)
sqrt(5) is 2.24, so we have
LA=54*2.24= 120.75


Question 739147: please help me solve x-0.25x
Answer by MathLover1(6634) About Me  (Show Source):

Question 738173: Round 1,039,296,119.4 to the nearest ten-millions' place and write the rounded number in scientific notation.

Answer by josgarithmetic(1530) About Me  (Show Source):
You can put this solution on YOUR website!
You have these positions for the format of your number:
X,XXX,XXX,XXX.X

The ten millions place is shown here using P:
X,XPX,XXX,XXX.X
You want to round to that place marked as P.

The given number rounded to the nearest ten millions place is:
1,040,000,000.0
and the significance of the digits to the right-hand side of the "4" are now lost, but we are instructed to convert to Scientific Notation.

Scientific Notation here will be move decimal point nine places to the left, and apply 10%5E9 as an adjusting factor:
highlight%281.04+%2A+10%5E9%29.
We ordinarily write an "x" instead of the multiplication dot.


Question 737046: Solve for x, round to three decimal places if
e (2x-3) = 100

Answer by MathLover1(6634) About Me  (Show Source):
You can put this solution on YOUR website!

if you have constant e here
e+%282x-3%29+=+100, then
e=2.718, approximately

2.718+%282x-3%29+=+100

+%282x-3%29+=+100%2F2.718

+2x-3+=+36.792

+2x=+36.792%2B3

+2x=+39.792

+x=+39.792%2F2

+x=+19.896


Question 735866: Solve for x to five decimal places if
5(4x-12) = 625
Substitute your x value answer
back into original and show that it
will make each side equal.

Answer by rfer(12662) About Me  (Show Source):
You can put this solution on YOUR website!
20x-60=625
20x=625+60
20x=685
x=685/20
x=34.25
--------------
5(4*34.25-12)=625
5(125)=625
625=625


Question 735587: 5. Convert each if the following binary representations to its equivalent base ten representation:
a. 111
b. 0001
c. 10101
d. 11011
please?

Found 2 solutions by MathTherapy, lynnlo:
Answer by MathTherapy(1425) About Me  (Show Source):
You can put this solution on YOUR website!

Convert each if the following binary representations to its equivalent base ten representation:
a. 111
b. 0001
c. 10101
d. 11011
please?

a. 7
b. 1
c. 21
d. 27

Answer by lynnlo(4164) About Me  (Show Source):
You can put this solution on YOUR website!
(A)10^2
(B)1.0
(C)10.101.10^4
(D)1.1011.10^4


Question 735588: 6. Convert each of the following base ten representations to its equivalent binary representation:
a. 7
b. 11
c. 16
d. 15
please?

Answer by lynnlo(4164) About Me  (Show Source):
You can put this solution on YOUR website!
(a)7.0(b)1.1.10^1(c)1.6.10^1(4)1.5.10^1


Question 730803: How to solve 4/25 into a mixed number as decimals
Answer by richwmiller(9143) About Me  (Show Source):
You can put this solution on YOUR website!
4/25=8/50=16/100=0.16


Question 730514: I need to know how to solve .4999 x 16.00027. I have the answer but new to know how to actually solve it.
Answer by rfer(12662) About Me  (Show Source):
You can put this solution on YOUR website!
Multiply then move decimal to the left 9 places
7.998534973


Question 727454: what is 0.1347 rounded to the nearest ten
Answer by MathLover1(6634) About Me  (Show Source):
You can put this solution on YOUR website!

0.1347 last digit is 7, since 7%3E5, you add 1%7D%7D+to+previous+digit+and+erase+%7B%7B%7B7
0.135..now, last digit is 5, since 5=5, you add 1%7D%7D+to+previous+digit+and+erase+%7B%7B%7B5
0.14..finally, last digit is 4, since 4%3C5, just erase 4
0.1 ...your answer; rounded to the nearest ten


Question 723867: estimate the answer by rounding 453+158+204+555+361
Answer by MathLover1(6634) About Me  (Show Source):
You can put this solution on YOUR website!
it's not clear to what you need to round it: to the nearest tents or to the nearest hundreds
453%2B158%2B204%2B555%2B361
453 you can round it to 450 (to the nearest tents) or 500 ( to the nearest hundreds)
158 you can round it to 150 (to the nearest tents) or 200 ( to the nearest hundreds)
204 you can round it to 200 (to the nearest tents) or 200 ( to the nearest hundreds)
555 you can round it to 560 (to the nearest tents) or 600 ( to the nearest hundreds)
361 you can round it to 360 (to the nearest tents) or 400 ( to the nearest hundreds)
if you need to round it to to the nearest tents, than you will have
450%2B160%2B200%2B560%2B360=1730
but, if you need to round it to to the nearest hundreds
, than you will have
500%2B200%2B200%2B600%2B400=1900


Question 722232: how can i write 0.349 as a fraction
Answer by MathLover1(6634) About Me  (Show Source):
You can put this solution on YOUR website!

+0.349=349%2F1000.... as a fraction


Question 722043: Express in fractional form. -4.35777...
Answer by KMST(1869) About Me  (Show Source):
You can put this solution on YOUR website!
We can worry about the minus sign later.
Let's consider x= 4.35777.....
1000x= 4357.7777...
100x= 435.7777...
1000x-100x= 4357.7777... - 435.7777...
900x=+3922
So x=3922%2F900.
We can simplify that fraction by dividing numerator and denominator by 2
x=1961%2F450
It cannot be simplified any further, because 1961 and 450 have no factors in common.
So 4.35777..... =1961%2F450
and -4.35777..... = -1961%2F450


Question 721752: Express the following in a decimal form. 0.9999... And 15.1344444....
Answer by Alan3354(30993) About Me  (Show Source):
You can put this solution on YOUR website!
Express the following in a decimal form. 0.9999... And 15.1344444....
They're in decimal form.
If you want fractional form:
----------
1n = 0.999...
10n = 9.999...
-1n= -0.999...
---------------- Subtract
9n = 9
n = 1
=================
Ignore the 15.13 for now
1n = 0.00444...
10n = 0.0444...
-1n =-0.00444...
----------------- Subtract
9n = 0.04
n = 0.04/9 = 4/900
---
15 + 13/100 + 4/900
= 15 + 117/900 + 4/900
= 15 121/900
or 13621/900




Question 721054: 2.2 in fraction form

Found 2 solutions by fcabanski, Vladdroid:
Answer by fcabanski(874) About Me  (Show Source):
You can put this solution on YOUR website!
2 and 2 tenths is 2 + 2/10 = 2 + 1/5 = 2 and 1/5. Convert into an improper fraction by multiplying the denominator by the whole number, adding the numerator, and placing that result over the denominator.


5x2+1 = 10+1 = 11/5.

Hope the solution helped. Sometimes you need more than a solution. Contact fcabanski@hotmail.com for online, private tutoring, or personalized problem solving (quick for groups of problems.)


Answer by Vladdroid(57) About Me  (Show Source):

Question 718375: what does pytogeroem theorem mean?
Answer by Alan3354(30993) About Me  (Show Source):
You can put this solution on YOUR website!
what does pytogeroem theorem mean?
---------
It means what it says.


Question 715872: 3.77*10 to the fourth power
8.5*10 to the third power
9.002*10 to the negative fifth power
1.91*10 to the negative third power

Answer by MathLover1(6634) About Me  (Show Source):

Question 712950: Find the fraction equivalent of .25454545454.... using geometric sums. Show work without using a calculator.
Answer by Alan3354(30993) About Me  (Show Source):
You can put this solution on YOUR website!
Find the fraction equivalent of .25454545454.... using geometric sums. Show work without using a calculator.
----------------
n = 0.25454...
---
1000n = 254.5454...
-10n = -2.5454...
----------------------
990n = 252
n = 252/990
n = 14/55


Question 710427: 6% of 800 is ?
Answer by MathLover1(6634) About Me  (Show Source):

Question 705718: 0.40 of 19=
Answer by stanbon(57377) About Me  (Show Source):
You can put this solution on YOUR website!
0.40 of 19 = (4/10)19 = 76/10 = 7.6
=========================
Cheers,
Stan H.


Question 705575: Jane,Andre,and Maria pick apples.Andre picks 3 times as many pounds as Maria.Jane picks 2 times as many pounds as Andre.The total weight of apples is 840 pounds.How many pounds of apples does Andre pick?
A 84 pounds
B 252 pounds
C 504 pounds
D 840 pounds

Answer by ptaylor(2048) About Me  (Show Source):
You can put this solution on YOUR website!
Let x=apples that Andre picks
Then x/3=apples that Maria picks
And 2x=apples that Jane picks
Soooo,
x +(x/3)+2x=840 multiply each term by 3
3x+x+6x=2520 collect like terms
10x=2520
x=252#----The amount of apples picked by Andre
x/3 = 252/3=84#---amount of apples picked by Maria
2x=2*252=504#---amount of apples picked by Jane
Hope this helps--ptaylor


Question 704191: there are 18.5 ounces of soup in a can. this is equivalent to 524 grams. If Jenna has 8 ounces of soup, how many grams does she have? Round your answer to the nearest whole gram
Answer by josmiceli(9691) About Me  (Show Source):
You can put this solution on YOUR website!
In terms of units:
( grams / ounce ) x ( ounces ) = grams
+%28+524+%2F+18.5+%29%2A8+=+226.59+
She has 227 grams


Question 703862: how do you convert the repeating decimal -1.666666666666667 into a fraction?
I know that the answer is supposed to be neagtive 5 thirds I just don't know to get it.

Answer by josgarithmetic(1530) About Me  (Show Source):
You can put this solution on YOUR website!
Look just at the 0.666666... part. Finding fraction form is by looking for reciprocal. Find 1 divided by 0.66666...

For convenience, try 1 divided by 0.667. What do you get? Something close to 1.499. This is very close to 1.5, but that is near the RECIPROCAL of 0.666666..., so what then is the reciprocal of 1.5? (One point five is same as one and a half which is the same as three halves).
...
You will find 2/3.


Question 703634: How do you convert -7/20 to a decimal

Found 2 solutions by jim_thompson5910, lynnlo:
Answer by jim_thompson5910(28595) About Me  (Show Source):
You can put this solution on YOUR website!
-7/20 = -35/100 = -0.35

So the answer is -0.35

Answer by lynnlo(4164) About Me  (Show Source):
You can put this solution on YOUR website!
0.3,DIVIDE 7 INTO 20,ROUND OFF TO WHOLE DECIMAL
7 DIVIDED BY 20=2.WITH 6 LEFT OVER ,ROUND OFF TO 0.3


Question 701990: Write 0.2 2/9 into fractional form.
Answer by rfer(12662) About Me  (Show Source):
You can put this solution on YOUR website!
=0.222
=222/1000=111/500


Question 701770: I need help with my math homework on decimals :
Decimal patterns with powers of 10.Divide
4 divided by 0.5

Answer by MathTherapy(1425) About Me  (Show Source):
You can put this solution on YOUR website!
I need help with my math homework on decimals :
Decimal patterns with powers of 10.Divide
4 divided by 0.5

4%2F0.5

When dividing decimals, you first need to convert the divisor, or the denominator (0.5 in this case) to a WHOLE number. This is attained by moving the decimal point one place to the right (this is the same as multiplying the divisor or denominator by 10), therefore leading to a divisor or denominator of 5.

Now, since the divisor's decimal point was moved 1 place to the right to make it a WHOLE number, we also need to move the decimal point in the NUMERATOR, one place to the right(this is the same as multiplying the numerator by 10). This gives us 40 as the numerator.

We now have: 40%2F5, which gives us: highlight_green%288%29

You can then check this answer on a calculator, if you're allowed to use one.

Send comments and “thank-yous” to “D” at MathMadEzy@aol.com


Older solutions: 1..45, 46..90, 91..135, 136..180, 181..225, 226..270, 271..315, 316..360, 361..405, 406..450, 451..495, 496..540, 541..585, 586..630, 631..675, 676..720, 721..765, 766..810, 811..855, 856..900, 901..945, 946..990, 991..1035, 1036..1080, 1081..1125, 1126..1170, 1171..1215, 1216..1260, 1261..1305