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

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Question 992021: -4÷-2=

Question 991727: round off 19327849 to nearest ten ,one thousannd and one million
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round off 19327849 to nearest ten ,one thousannd and one million
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19327850
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19328000
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19000000

Question 990625: write 3/16 as a decimal, please
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to write as a decimal, divide by and you will get

Question 990381: Clayton biked 0.375(3/8) of the 14.5 miles between his house and the beach.How many more miles does he still have to bike before he reaches the beach?
You can put this solution on YOUR website!
.
If he has covered 3/8, he has 5/8 to go:
.
(5/8)(14.5 miles)=9.06 miles
ANSWER: He still has 9.06 miles to go.

Question 990136: what is 1,995,298 rounded to the nearest ten thousand
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what is 1,995,298 rounded to the nearest ten thousand
===========================
= 2000000

Question 988829:
a fruit basket contains 4 apples 3 oranges 2 bananas what is the ratio of oranges to total in its siplest form

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.
A fruit basket contain 4 apples 3 oranges 2 bananas what is the ratio of apples to oranges to banana to total.
4:3:2:9
.
A fruit basket contains 4 apples 3 oranges 2 bananas what is the ratio of oranges to total in its simplest form
3:9 = 1:3

Question 988646: 0.000487
You can put this solution on YOUR website!

Question 988587: Express 1 day 16 hours 4 minutes as a decimal fraction of 8 days 8 hours 20 minutes.
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.
Time (1) in minutes=(1day)(86400min/day}+(16hrs)(60min/hr)+(4min)
Time (1) in minutes=(86400min)+(960min)+(4min)= 87364 minutes
.
Time (2) in minutes=(8days)(86400min/day)+(8hrs)(60min/hr)+(20min)
Time (2) in minutes=(691200min)+(480min)+(20min)= 691700 minutes
.
=

Question 988196: What are three numbers between 0.33 and 0.34?
Found 2 solutions by solver91311, ikleyn:
You can put this solution on YOUR website!

0.331 is one. There are an infinity of others.

John

My calculator said it, I believe it, that settles it

You can put this solution on YOUR website!
.
0.331, 0.332, 0.333

Question 976077:
You can put this solution on YOUR website!
What is your question? You did not write anything in the blank.

Question 985494: how can i calculate 2^.4 and (1/2)^.4 without using calculator in short time??
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.
You should precede decimals by zero to prevent misinterpretation.
.
=
There is no easy way from here to do this quickly.
The same with:

No quick way. You estimate, multiply out, average, multiply out, etc.
It is a slow process.

Question 985152: Hello Sir,
I want to know "Octal to Decimal conversion"- formula
&
Thanks

Answer by Edwin McCravy(13211)   (Show Source):
You can put this solution on YOUR website!
I'm assuming you mean converting whole numbers, integers.
Converting fractions is different.

For octal, the algorithm is this, starting with the first digit

Multiply by 8
Multiply by 8
.....

In hex, just use 16 instead of 8, and remember that A=10, B=11, etc.

until you run out of digits.

Suppose you have the octal number

647210538

6
6*8+4 =  52
52*8+7 =  423
423*8+2 =  3386
3386*8+1 =  27089
27089*8+0 =  216712
216712*8+5 =  1733701
1733701*8+3 = 13869611

647210538 = 1386961110

Suppose we have the hex number:

D59A52C16

You might want to write it this way first:

(13)59(10)52(12)

13
13*16+5  = 213
213*16+9  = 3417
3417*16+10 = 54682
54682*16+5  = 874917
874917*16+2  = 13998674
13998674*16+12 = 223978796

So D59A52C16 = 22397879610

It's very easy with a TI graphing calculator, because when
you press *16+ after a calculation you don't have to reenter
the last number, it just automatically uses it as Ans and you
see Ans*16+.  So it's very fast on a TI.

Edwin

Question 984565: Round 71,290 to the nearestMO ten
You can put this solution on YOUR website!

Round to the nearest ten: it's already rounded to the nearest ten

Question 984068: Sqrt0.81*10^-5/2.25*10^7

Question 984055: simplify 13.333-7.308-1.94-4.345+16.13
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You do it.

Question 983989: simplify 13.333-7.308-1.94-4.345+16.13

You can put this solution on YOUR website!
You do it, I'll check your work.
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I don't need the practice.

Question 983814:

Question 982543: Q. 40 % of a company’s employees are women. Out of the men, 60 % are of age more than 30 yrs. If there are 36o male employees below the age of 30, what is the total number of employees in the company ?

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60% of males are more than 30 yrs old
40% of the males are less than 30 yrs old
Let = the number of males in company

---------------
Let = total employees in the company
900 males is 60% of the company

There are 1500 employees in the company
OK

Question 982257: Hello Ma'am/Sir,

A). Determine the decimal equivalent of the given number(67.33)8.
B). Determine the decimal equivalent of the given number(115)16

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A). Determine the decimal equivalent of the given number(67.33)8.
If you mean base 8,
--> 6*8 + 7 + 3/8 + 3/64
= 55.421875
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B). Determine the decimal equivalent of the given number(115)16
= 256 + 16 + 5
= 277

Question 981219: What is the smallest number that rounds to 250 to the nearest ten?
What is the largest number that rounds to 250 to the nearest ten?
How many numbers round to 250 to the nearest ten?

You can put this solution on YOUR website!
When the digit that is going to be discarded is 5 or more,
the digit to its left is increased by 1.
Otherwise the digit to the left is unchanged

According to the rules above,
245 rounds to 250 to the nearest ten, and 244 rounds to 240,
because the digit that is going to be discarded is the 5 or 4 at the units place,
and when the digit to be discarded is 5 or more,
the digit to its left (in this case the 4 in the tens place) is increased by 1,
but otherwise the digit to the left is unchanged

So is the smallest number that rounds to 250 to the nearest ten.

Similarly, according to the rules above,
254 rounds to 250 to the nearest ten, and 255 rounds to 260.

So is the largest number that rounds to 250 to the nearest ten.

Numbers greater than do not round to 250 to the nearest ten.
Numbers smaller than do not round to 250 to the nearest ten.
Out of the numbers from 1 to 254,
the first (1 to 244) do not round to 250 to the nearest ten.
So, the number of numbers that round to 250 to the nearest ten is
.

Question 981153: 19.76485;tenths
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Do you have a question?

Question 980839: (10011001.101)2=(?)10

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You can do your own arithmetic.

John

My calculator said it, I believe it, that settles it

Question 979777: -0.14 divided by -0.1

Question 979581: What is the smallest decimal in hundredths that round to 0.5?
You can put this solution on YOUR website!
What is the smallest decimal in hundredths that round to 0.5?
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0.45

Question 978077: 1.Write as decimals, correct to two decimal places
91/16
2.find 3% of 200 pesos
3.a municipality levies a 12% sales tax. Find the tax on a car listed 350,000 pesos

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91/16=5 and 11/16
11/16=0.6875
5.69
200*0.03=6 3% of 100 is 3, and 3% of 200 is 6.
350,000*0.12=42,000
Ten per cent would be 35,000
one per cent is 3500
two per cent is 7000
Twelve per cent is 42000

Question 976309: What is the smallest percentage that rounds to…
…90% when rounded to the nearest percent?
…90.0% when rounded to the nearest tenth of a percent?
…90.00% when rounded to the nearest hundredth of a percent?

You can put this solution on YOUR website!
89.5% would round to 90%
89.95% would round to 90.0%
89.995% would round to 90.00%

Question 973272: Please help me with this problem. I am helping my 9 year old cousin with her homework and I don't understand this problem.
Sally and Joshua have the same amount of money. Joshua pays $9.10 for a bag and has$16.25 left. Sally buys a pen and has $19.60 left. How much does the pen cost? Answer by Edwin McCravy(13211) (Show Source): You can put this solution on YOUR website! Joshua pays$9.10 for a bag and has $16.25 left.   Sally and Joshua have the same amount of money. Therefore Sally also starts with$25.35.


Sally buys a pen and has $19.60 left. How much does the pen cost?  Edwin Question 972856: 4. Hydrologists sometimes use Manning's equation to calculate the velocity v, in feet per second, of water flowing through a pipe. The velocity depends on the hydraulic radius Rin feet, which is one-quarter of the diameter of the pipe when the pipe is flowing full; the slope S of the pipe, which gives the vertical drop in feet for each horizontal foot; and the roughness coefficient n, which depends on the material of which the pipe is made. The relationship is given by the following. v = 1.486 n R2/3S1/2 For a certain brass pipe, the roughness coefficient has been measured to be n = 0.014. The pipe has a diameter of 3 feet and a slope of 0.4 foot per foot. (That is, the pipe drops 0.4 foot for each horizontal foot.) If the pipe is flowing full, find the hydraulic radius of the pipe. (Round your answer to two decimal places.) ft Find the velocity of the water flowing through the pipe. (Round your answer to two decimal places.) ft/s Answer by solver91311(20879) (Show Source): You can put this solution on YOUR website! This is just an arithmetic problem. Plug in your given numbers and then do the necessary calculator work. John My calculator said it, I believe it, that settles it Question 972854: 3. (a) A rope is wrapped tightly around a wheel with a radius of 3 feet. If the radius of the wheel is increased by 2 feet to a radius of 5 feet, by how much must the rope be lengthened to fit around the wheel? (Round your answer to two decimal places.) ft Answer by rfer(15570) (Show Source): You can put this solution on YOUR website! 6*3.14=18.84 10*3.14=31.4 31.4-18.84=12.56 longer Question 972460: express 0.005 as a quotient of two integers Answer by Edwin McCravy(13211) (Show Source): You can put this solution on YOUR website! The decimal 0.005 is read as "five thousandths". The fraction is ALSO read as "five thousandths". So they are the same thing. We can't "reduce" the decimal, but we CAN reduce the fraction! We divide the top and bottom of by 5 That's a quotient of two integers because 1 and 200 are both integers and putting one over the other is dividing and when we divide we get a quotient. Edwin Question 969920: Can you explain how to round the following number 1345.617 to the nearest thousandth Answer by AnlytcPhil(1539) (Show Source): You can put this solution on YOUR website!  1345.617 already has its last decimal in the thousandth place, so you consider it "already rounded to the nearst thousandth". So you do nothing. So you are given the solution to the problem. :) Answer: 1345.617 Edwin  Question 778602: a. Determine the decimal equivalent of the given number 34.51*8 b. determine the decimal equivalent of the given number 155*16 Answer by EdenWolf(454) (Show Source): You can put this solution on YOUR website! They are already decimals... Question 968552: -5-(-9) Answer by EdenWolf(454) (Show Source): You can put this solution on YOUR website! -5-(-9) -5+9 4 Question 968278: What's 0.1 as a simplified fraction Answer by Fombitz(25151) (Show Source): Question 968259: The result of (15,128)^5 must end in ? Answer by checkley77(12844) (Show Source): You can put this solution on YOUR website! 8*8*8*8*8=32,768 8 is the answer. Question 15939: What is the answer to the equation: 10 to the zero power. Is it zero or n/a?? Answer by JimMarshall(82) (Show Source): You can put this solution on YOUR website! ' 10^0 = 1, 20^0 = 1, 30^0 = 1, 7^0 = 1, 9^0 = 1, (-7)0 = 1  Every number raised to the zero power is 1 with one exception.  That one exception is that 0^0 is not defined". ` 10 is not 0, so therefore 10^0 = 1 Ans Question 13248: what is 0.00406 rounded to the tenth power? 4.06 10x 3 or 4.06 10x -3 Answer by JimMarshall(82) (Show Source): You can put this solution on YOUR website! 0.00406=4.06 x 0.001 = 4.06 x 10^-3 Ans Question 8829: What is Y to the 2 power Answer by JimMarshall(82) (Show Source): You can put this solution on YOUR website! Y to the second power is just that = y^2 .ANS Question 9081: the preimeter of a triangle is given by the formula P=? (thank you for the help) Answer by JimMarshall(82) (Show Source): You can put this solution on YOUR website! Let the perimeter P, of a triangle is given by the formula P = a + b + c where a, b and c are the side and lengths of the triangle Question 7988: Hi: .24 - 6 I'm not sure how to handle the lower number on top. Do I move the decimal point over two to the right? Thanks Answer by JimMarshall(82) (Show Source): You can put this solution on YOUR website! .24-6 == > -6.00+.24 ==> -5.76 Ans Question 8189: hue put 450.00 in an account that pays intrest at an annual rate of 3% how much will she have in 2 years? Answer by JimMarshall(82) (Show Source): You can put this solution on YOUR website! Interest= ( Principle*Rate*Time ) ==>I=450*.03*2 ==>I=$27
She will have \$477.00 in 2 years .
ans

Question 9770: Why is 10 to the zero power 1.