Wednesday

April 23, 2014

April 23, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

x + x+30 = 90 now solve for x
*Tuesday, April 8, 2014 at 5:04am*

**Math**

too late for your spelling and punctuation, apparently...
*Tuesday, April 8, 2014 at 4:58am*

**Math**

Go to bed it is to late
*Tuesday, April 8, 2014 at 4:56am*

**Math**

well, it's clear that if there is 1 bus, the numbers work out: 40+16 = 36+20 If there are more buses, then since LCM(40,36) = 360, any multiple of 360 + 56 will also work, with an extra 9 buses if 40/bus, and an extra 10 buses if 36/bus, for each extra 360 kids.
*Tuesday, April 8, 2014 at 4:53am*

**Math**

The teachers in a childcare center are taking their children for a field trip.if each bus takes 40 children, there will be 16 vacant seats. If each bus takes 36 children, 20 children will not get any seats. How many buses are there?
*Tuesday, April 8, 2014 at 4:45am*

**Math**

Thanks Steve!
*Tuesday, April 8, 2014 at 3:00am*

**math**

Two angles are complementary. One contains 30° more than the other. Find both angles
*Tuesday, April 8, 2014 at 1:44am*

**Math (help)**

how to find the surface area of a cone with a diameter of 8 and a slant height of 7? with steps? please
*Tuesday, April 8, 2014 at 1:05am*

**Math**

Please help me with the following by checking my answer. The length of the hypotenuse of an isosceles right triangle is √6 inches. How long, in inches, are the legs of the triangle? A. 3 B. 6 C. √3 - (This is my answer.) D. √6 I am not sure on my answer, ...
*Tuesday, April 8, 2014 at 12:47am*

**math**

I dont know
*Tuesday, April 8, 2014 at 12:32am*

**math**

room: Vr = 11.35*9.5*8.3 = 894.9 box: Vb = 4.25*6.5*4.0 = 110.5 now, subtract and round.
*Tuesday, April 8, 2014 at 12:05am*

**Business math**

The Treasury Department auctioned $21 billion in 3-month bills in denominations of $10,000 at a discount rate of 4.965%. What would be the effective rate of interest? (Use calendar year. Do not round intermediate calculations. Round your answer to the nearest hundredth ...
*Monday, April 7, 2014 at 11:51pm*

**Math**

Thank you Reiny, I now understand! :)
*Monday, April 7, 2014 at 11:42pm*

**business Math**

Please help? The Treasury Department auctioned $21 billion in 3-month bills in denominations of $10,000 at a discount rate of 4.965%. What would be the effective rate of interest? (Use calendar year. Do not round intermediate calculations. Round your answer to the nearest ...
*Monday, April 7, 2014 at 11:35pm*

**Math**

white / green = 3/2 w/18 = 3/2 2w = 54 w = 27 check: 27/18 = 3/2
*Monday, April 7, 2014 at 11:35pm*

**business Math**

Carl Sonntag wanted to compare what proceeds he would receive with a simple interest note versus a simple discount note. Both had the same terms: $19,500 at 8% for 2 years. Use ordinary interest as needed. a. Calculate the simple interest note proceeds. Can someone help me? ...
*Monday, April 7, 2014 at 11:34pm*

**business Math**

You were offered the opportunity to purchase either a simple interest note or a simple discount note with the following terms: $33,353 at 7% for 18 months. a. Calculate the effective interest rate. (Do not round intermediate calculations. Round your final answer to the ...
*Monday, April 7, 2014 at 11:33pm*

**Math**

√(2x^2+5)=2 square both sides 2x^2 + 5 = 4 2x^2 = -1 x^2 = -1/2 no solution, since we cannot take the square root of a negative in the real number set.
*Monday, April 7, 2014 at 11:33pm*

**Business Math**

Can someone help me with this problem: On September 5, Sheffield Company discounted at Sunshine Bank a $9,000 (maturity value), 120-day note dated June 5. Sunshineâ€™s discount rate was 9%. (Use Days in a year table.) What proceeds did Sheffield Company receive...
*Monday, April 7, 2014 at 11:31pm*

**Math **

Their are 18 green blocks in a bag.their are 3 white blocks for every 2green blocks.witch proportion can be used to find w,the total number of white blocks in the bag?
*Monday, April 7, 2014 at 11:00pm*

**Math help**

http://www.google.com/webhp?source=search_app#q=surface+area+of+a+cone
*Monday, April 7, 2014 at 10:59pm*

**Math**

Please help me with the following by checking it. Solve for x: √(2x^2+5)=2 A. ±1 B. √2 - (This is my answer.) C. ±2 D. None of the above. I am not sure about my answer, can someone check it please. Any help will be greatly appreciated.:)
*Monday, April 7, 2014 at 10:55pm*

**Math help**

how to find the surface area of a cone with a diameter of 8 and a slant height of 7?
*Monday, April 7, 2014 at 10:49pm*

**Math help**

I got 24,501.42 cubic meters.
*Monday, April 7, 2014 at 10:20pm*

**Math help**

okay I figured it out, is it 24513.84? @Ms.Sue
*Monday, April 7, 2014 at 10:15pm*

**Math help**

http://www.google.com/webhp?source=search_app#q=volume+cylinder
*Monday, April 7, 2014 at 10:02pm*

**Math help**

How do you find the volume of a cylinder with a diameter of 34m and a height of 27m?
*Monday, April 7, 2014 at 10:01pm*

**Math help Please**

My willy bird is 6 inches and has a mass, M, of 2.1kg. During penetration, it reaches a force or 15.0 N with a coefficient of friction 0.75. Calculate its rotational velocity given no respect to time. How much work is done in a thirty second period?
*Monday, April 7, 2014 at 9:51pm*

**Math**

Dough + Heat = Cookie
*Monday, April 7, 2014 at 9:49pm*

**math**

a storage room measures 11.35 feet in length by 9.5 feet in width by 8.3 feet in height. it contains a box which is 4.25 feet in length 6.5 feet in width and 4.0 feet in height.how many cubic feet of storage space are left in the room rounded to the nearest cubic foot
*Monday, April 7, 2014 at 9:49pm*

**Math**

Atta go :) You are welcome.
*Monday, April 7, 2014 at 9:42pm*

**Math**

If hannah 2/3 of a quart of milk and sh used half the answer is 2/6 or simplified 1/3
*Monday, April 7, 2014 at 9:31pm*

**Math**

Monique is making cookies for the pajama party at her house. She has 3-1/2 cups of sugar. The recipe calls for 3/4 cup of sugar for one batch of cookies. Write an equation that can be used to find c, the total number of batches of cookies she can make.
*Monday, April 7, 2014 at 9:28pm*

**Math**

ok I got now. Thank you so much for your help, I appreciate it.
*Monday, April 7, 2014 at 9:25pm*

**Math**

I got t=70 and it still says it is wrong.
*Monday, April 7, 2014 at 9:23pm*

**Math**

1n+7p = 5.55 3n+2p = 12.28 that's the same as 2n+14p = 11.10 21n+14p = 85.96 now subtract to get rid of the p's 19n = 74.86 n = 3.94
*Monday, April 7, 2014 at 9:20pm*

**Math**

1n + 7p = 5.55 3n + 2p = 12.28 from the first: n = 5.55-7p sub into the 2nd 3(5.55-7p) + 2p = 12.28 16.65 - 21p + 2p = 12.28 -19p = -4.37 p = .23 then n = 5.55 - 7(.23) = 3.94 check: 1 notebook + 7 pencils = 3.94 + 7(.23) = 5.55 3 notebooks + 2 pencils = 3(3.94) + 2(.23) = 12....
*Monday, April 7, 2014 at 9:19pm*

**Math**

Right now, (-2,-5) is 5 units below the x-axis so reflecting it over the x-axis would put it how many units above the x-axis ? And the total distance would be ...... ?
*Monday, April 7, 2014 at 9:14pm*

**Math**

Jim paid $ 5.55 for 1 notepad and 7 pencils. Anne paid $ 12.28 for 3 notepads and 2 pencils. How much does each notepad cost? Show all work
*Monday, April 7, 2014 at 9:13pm*

**Math **

What is the distance between (-2,-5) and its reflection over the x-axis?
*Monday, April 7, 2014 at 9:07pm*

**Math**

dQ/dt = 200(-.0488) e^-.0488 t
*Monday, April 7, 2014 at 9:04pm*

**Math**

3(0.4h+5)>4(0.2h+7) 1.2h + 15 > .8h + 56 1.2h - .8h > 56 - 15 .4h > 41 h > 41/.4 h > 102.5
*Monday, April 7, 2014 at 9:03pm*

**Math**

thanks
*Monday, April 7, 2014 at 9:02pm*

**Math**

A = Ai e^-kt .5 = e^-14.2 k ln .5 = -14.2 k k = .0488 so Q = 200 e^-.0488 t
*Monday, April 7, 2014 at 9:02pm*

**Math**

least common multiple 8 = 2*2*2 30 = 5*2*3 so we need a 5, 3 twos, and a 3 so 120
*Monday, April 7, 2014 at 8:58pm*

**Math**

y=-x x+y=3
*Monday, April 7, 2014 at 8:56pm*

**math word problem PLEASE HELP**

r = ribbon = 15 (5 3/8) - 10(3/4) r = 15 (43/8) - 60/8 r = (15*43 - 60 )/8 = 585/8 = 73 1/8 yards
*Monday, April 7, 2014 at 8:55pm*

**math (Ms.Sue)**

28ft.
*Monday, April 7, 2014 at 8:51pm*

**Math**

At a baseball stadium, every eighth person received a coupon for free popcorn. Every thirtieth person received a free hot dog. WHich person was the first to receive both free gifts?
*Monday, April 7, 2014 at 8:50pm*

**math word problem PLEASE HELP**

Susan uses 15 rolls of ribbon to decorate 10 wedding baskets. Each roll of ribbon is 5 3/8 yards long. After she decorates the baskets, she decides to cut off another 3/4 yard from the ribbon of each basket. Write and simplify an expression to fin out how much ribbon was used ...
*Monday, April 7, 2014 at 8:42pm*

**Math**

This is what I got and it says it is wrong. Can you tell me what I'm doing wrong please? Thanks Q(t) = 200(.5)^(.0704t) Q '(t) = (200/14.2) (.5)^(t/14.2) so when t = 21.5 Q ' (t) = (200/14.2) (.5)^(21.5/14.2) = 4.931 g/day
*Monday, April 7, 2014 at 8:41pm*

**Math**

Thanks for the help.
*Monday, April 7, 2014 at 8:37pm*

**Math**

11 is correct.
*Monday, April 7, 2014 at 8:31pm*

**Math**

Ms.Smith wrote the division problem shown below, using a box to represent the missing digit. What value can replace the box in the quotient to complete the division problem? 132 divided by 12 and i got 11 but does 11 answer the question or do i put 1 for the value left?
*Monday, April 7, 2014 at 8:30pm*

**Math**

Ahh, looks like neither one of us read the question carefully. P(t) given the percentage that will FAIL, which is 30.2% But it says, "what percentage ... is usable " so 100 - 30.2 or 69.8%
*Monday, April 7, 2014 at 8:28pm*

**Math**

You percent is percent that will FAIL It asks for the ones that do not fail.
*Monday, April 7, 2014 at 8:28pm*

**Math**

100 - 30.2
*Monday, April 7, 2014 at 8:27pm*

**Math**

This is what I got too, but it says that my answer is wrong.
*Monday, April 7, 2014 at 8:26pm*

**math**

505200000000000 = 505,200,000,000,000 = 505.2 * 10^12 = 5.052 * 10^14 so YES :)
*Monday, April 7, 2014 at 8:25pm*

**math**

Have to write the number would it be 505200000000000
*Monday, April 7, 2014 at 8:21pm*

**Math**

sin 2x - sinx =0 2sinx cosx - sinx = 0 sinx(2cosx - 1) = 0 sinx = 0 or cosx = 1/2 for sinx = 0 x = 0, 180°, 360° for cosx = 1/2 x = 60° , 300° so for 0 ≤ x ≤ 360° x = 0, 60, 180, 300, 360 in radians: x = 0 , π/3 , π , 5π/3 , 2π
*Monday, April 7, 2014 at 8:20pm*

**math**

5.052 x 10^14
*Monday, April 7, 2014 at 8:16pm*

**science/math**

1. No If it hits at 42 from the SURFACE that is 90-42 = 48 from the normal. The reflected ray will also be 48 from the normal. 2. NO 27 + 27 = 54
*Monday, April 7, 2014 at 8:15pm*

**Math**

just plug in t = 3 P(3) = 100(1 - e^-.36) = 30.23 So appr 30.2%
*Monday, April 7, 2014 at 8:15pm*

**Math**

sin 2 x = sin x when x = 0, 180, 360 etc
*Monday, April 7, 2014 at 8:13pm*

**Math**

Now I did problems very similar to this for you earlier. You try and I will check if I am around.
*Monday, April 7, 2014 at 8:10pm*

**Math**

Find the exact solutions of the equation In The interval.. Sin 2x -sin x=0
*Monday, April 7, 2014 at 8:10pm*

**Math**

You sure are having quite a time with these exponential functions! y = 190 [ 1- .955 e^-(.25 t) ] If t = 9 y = 190 [ 1 - .955(.105) ] = 190 [ 1 - .1 ] = 171 cm In other words it has reached 90% of max length in 9 years now dy/dt = 190(-.955) (-.25)(.105) = 4.76 cm/year c) when...
*Monday, April 7, 2014 at 8:09pm*

**science/math**

1. A light ray strikes a mirror at an angle of 42° from the surface of the mirror. What angle does the reflected ray make with the normal Ans. 42° 2. A ray of light hits a mirror at 27° from the normal. What is the angle between the reflected ray and the normal. ...
*Monday, April 7, 2014 at 8:08pm*

**Math**

P(t) = 100(1-e^-0.12*3) P(3) = 100(1-0.6977) = 30.23% Fails. 100% - 30.23% = 69.7% Usable.
*Monday, April 7, 2014 at 8:05pm*

**math**

Right. :-)
*Monday, April 7, 2014 at 8:03pm*

**math**

I got 0.675?
*Monday, April 7, 2014 at 7:53pm*

**Math**

The percentage of a certain brand of computer chips that will fail after t years of use is estimated to be P(t) = 100(1 − e−0.12t ). What percentage of this brand of computer chips are expected to be usable after 3 years? (Round your answer to one decimal place.)
*Monday, April 7, 2014 at 7:50pm*

**Math**

Phosphorus-32 (P-32) has a half-life of 14.2 days. If 200 g of this substance are present initially, find the amount Q(t) present after t days. (Round your growth constant to four decimal places.) How fast is the P-32 decaying when t = 21.5? (Round your answer to three decimal...
*Monday, April 7, 2014 at 7:49pm*

**math**

Divide.
*Monday, April 7, 2014 at 7:49pm*

**math**

0.325 = three hundred twenty-five ten thousandths
*Monday, April 7, 2014 at 7:49pm*

**Math**

The length (in centimeters) of a typical Pacific halibut t years old is approximately f(t) = 190(1 − 0.955e−0.25t). (b) How fast is the length of a typical 9-year-old Pacific halibut increasing? cm/yr (c) What is the maximum length a typical Pacific halibut can ...
*Monday, April 7, 2014 at 7:48pm*

**math**

During a recent free throw basketball tournament, jessica makes 27 out of 40 free throws. Express this amount as a decimal.
*Monday, April 7, 2014 at 7:44pm*

**math**

A professional baseball player has a battung average of 0.325 , express the players batting average as a fraction in simplest form.
*Monday, April 7, 2014 at 7:43pm*

**math**

Right. 15% of her answers were wrong.
*Monday, April 7, 2014 at 7:34pm*

**Math**

The largest exponent of the variable is 2. Therefore, it is a 2nd degree polynomial.
*Monday, April 7, 2014 at 7:34pm*

**math**

I am not sure but I have 15?
*Monday, April 7, 2014 at 7:29pm*

**Math**

I got the answer .22882 is that correct?
*Monday, April 7, 2014 at 7:25pm*

**math**

You mistyped Green Marbles. I assume 3. Total marbles = 5 + 6 + 3 + 2 = 16 Total Blue and Green = 6+3 = 9 Fraction of those marbles = 9/16 = 0.5625 If there are not 3 marbles, then change.
*Monday, April 7, 2014 at 7:19pm*

**math**

And your answer is?
*Monday, April 7, 2014 at 7:18pm*

**MATH**

spam spam spam spam spam spam spam spam
*Monday, April 7, 2014 at 7:18pm*

**math**

On a recent math test, monique earned an 85%. Which value represnts the amount monique did not answer correctly?
*Monday, April 7, 2014 at 7:18pm*

**math**

If you post your answers, I'll check them.
*Monday, April 7, 2014 at 7:18pm*

**Consumer Math**

I don't entirely understand the question. Let me do my best. $187,500 is cost of house. 20%, or $37,500 is the down payment. The loan amount would be $187,500 - $37,500 = $150,000. If we assume the annual rate of the loan is 4.65% Then the monthly rate would be 4.65%/12 = ...
*Monday, April 7, 2014 at 7:16pm*

**Math**

12.5/5 = x/8
*Monday, April 7, 2014 at 7:13pm*

**math**

There are 5 red marbles, 6 blue marbles, e green marbles, and 2 yellow marbles in a bag. What percent or fraction represents the number of blue and green marbles in the bag?
*Monday, April 7, 2014 at 7:11pm*

**math**

The New Jersey state lottert is $173,000,00. If you and your family win the lottery and recieve 5% of that amount for the next twenty years how kuch money will you recieve each year?
*Monday, April 7, 2014 at 7:09pm*

**Math**

This is about ratios Jason spent $12.50 for 5 ft of 6 in copper pipe. He returned after 2 days to buy 3 more feet of the same pipe. How much did he spend in all for a pipe
*Monday, April 7, 2014 at 7:05pm*

**math**

I'll be glad to check your answer.
*Monday, April 7, 2014 at 7:03pm*

**MATH - Algebra**

yes, except you had 22x, not 11x So, the answer is x^2 + 2x also, be sure to use parentheses to make it clear that you mean (11x^2+22x)/11 and not 11x^2 + (22x/11)
*Monday, April 7, 2014 at 7:03pm*

**math**

Which set of numbers does not contain three numbers that are equivalent? - Choices are:- A. 1/2,0.5,50% B. 1/5,0.02,20% C. 1/8,0.125,12.5% D. 1/20,0.05,5%
*Monday, April 7, 2014 at 7:01pm*

**Math**

well, we have cosa = 12/13 sinb = 4/5 So, just plug them into cos(a+b) = cosa cosb - sina sinb
*Monday, April 7, 2014 at 7:00pm*

**math**

0.97 * 57,545 =
*Monday, April 7, 2014 at 7:00pm*

**math**

Yankee stadium can seat 57,545 people. At a recent game, it was reported that appoximately 97% of the tickets were sold. Based on that report, what is the best estimate for how many people attended the game?
*Monday, April 7, 2014 at 6:59pm*

**MATH ✿╣Check╠✿**

looks good to me
*Monday, April 7, 2014 at 6:59pm*

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