Sunday

April 20, 2014

April 20, 2014

**Branches of Math**

**Recent Math Questions**

Post a New Question | Current Questions

**math**

You are welcome.
*Monday, April 7, 2014 at 6:57pm*

**math**

120/200 = 12/20 = 3/5
*Monday, April 7, 2014 at 6:52pm*

**math**

15/24 = 5/8 = 0.625
*Monday, April 7, 2014 at 6:51pm*

**MATH - Algebra **

Help with problem already posted. Thanks
*Monday, April 7, 2014 at 6:47pm*

**math**

Martha read 120 pages in her book, which has a total of 200 pages. Which fraction best represents the portion of the book that she has not read?
*Monday, April 7, 2014 at 6:44pm*

**math**

Select the best graph: 1. What data display would best list the frequency of the number of students that received an 85% on test?
*Monday, April 7, 2014 at 6:43pm*

**math**

What is the equivalent form of 15/24?
*Monday, April 7, 2014 at 6:41pm*

**math**

Martha read 120 pages in her book, which has a total of 200 pages. Which fraction best represents the portion of the book that she has not read?
*Monday, April 7, 2014 at 6:39pm*

**Math**

3(0.4h+5)>4(0.2h+7)
*Monday, April 7, 2014 at 6:39pm*

**math**

Thanks a lot
*Monday, April 7, 2014 at 6:37pm*

**math**

Thank you
*Monday, April 7, 2014 at 6:37pm*

**Math**

Yes, because the the question said he arrived a quarter after eight.
*Monday, April 7, 2014 at 6:37pm*

**MATH ✿╣Check╠✿**

what is the surface area of a sphere with a radius of 5 meters rounded to the nearest square meter? MY ANSWER: 314m^2 (is it correct?)
*Monday, April 7, 2014 at 6:31pm*

**Math **

Angles A and B are located in the first quadrant. If sin a =5/13 and cos b= 3/5 , determine the exact value of cos (a+b) .
*Monday, April 7, 2014 at 6:31pm*

**Math**

You're welcome.
*Monday, April 7, 2014 at 6:22pm*

**Math**

Thanks!
*Monday, April 7, 2014 at 6:21pm*

**math**

A = pi * r^2 A = 3.14 * 64 A = _______ sq. m.
*Monday, April 7, 2014 at 6:21pm*

**Math**

X/5=12 Multiply both sides by 5 x = 60
*Monday, April 7, 2014 at 6:17pm*

**math**

Well-- since we can't sell four-tenths of a computer, it makes sense to round up to 63. Right?
*Monday, April 7, 2014 at 6:16pm*

**math**

I got 62.4 but the choices I have are 15, 34 , 63 , or 78
*Monday, April 7, 2014 at 6:13pm*

**math**

A circular sprinkler spreads water up to 8 meters away. What area of the lawn gets watered?
*Monday, April 7, 2014 at 6:12pm*

**math word problem**

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 6:11pm*

**Math**

Solve the equation My answer-60
*Monday, April 7, 2014 at 6:06pm*

**Math**

X/5=12
*Monday, April 7, 2014 at 6:06pm*

**math**

48 * 1.3 = ?
*Monday, April 7, 2014 at 5:59pm*

**Math please help**

A rectangular room has a perimeter of 36 feet.One side is 10 feet long.How long is side s?
*Monday, April 7, 2014 at 5:58pm*

**Math please help**

A rectangular room has a perimeter of 36 feet.One side is 10 feet long.How long is side s?
*Monday, April 7, 2014 at 5:58pm*

**math**

The sales team at an electronics store sold 48 computers last month. The manager at the store wants to encourage the sales team to sell more computers and is going to give all the sales team members a bonus if the number of computers sold increases by 30% in the next month. ...
*Monday, April 7, 2014 at 5:57pm*

**Math**

Angles A and B are located in the first quadrant. If sin a =5/13 and cos b= 3/5 , determine the exact value of cos (a+b) .
*Monday, April 7, 2014 at 5:54pm*

**5th grade math**

On each bounce a ball reaches 4/5 of the height of its previous bounce.How high will the ball bounce on its 3rd bounce? Also, how many bounces will it take the ball to bounce to a height that is less than 1/2 of the height of the first bounce?
*Monday, April 7, 2014 at 5:50pm*

**gerund phrases**

I am trying to wring this as a verb ? Earning an excellent grade in math
*Monday, April 7, 2014 at 5:50pm*

**Math**

If ???
*Monday, April 7, 2014 at 5:49pm*

**math**

1/2 base*height=area base=2*area/height
*Monday, April 7, 2014 at 5:48pm*

**math**

The area of a triangle is 135 square inches. If the height is 15 inches, what is the length of the base?
*Monday, April 7, 2014 at 5:46pm*

**Math**

22.Angles A and B are located in the first quadrant. If and , determine the exact value of . How do I get 16/65?
*Monday, April 7, 2014 at 5:44pm*

**math**

approximately ???
*Monday, April 7, 2014 at 5:41pm*

**math**

Right.
*Monday, April 7, 2014 at 5:33pm*

**math**

M = 3s s + 26 = m s + 26 = 3s 26 = 2s s = 13 54-13 = 41 Correct
*Monday, April 7, 2014 at 5:33pm*

**math**

Sally is 54 years old and her mother is 80, how many years ago was Sally’s mother three times her age? I believe that the answer is 41 years??
*Monday, April 7, 2014 at 5:22pm*

**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 5:16pm*

**math**

The length (in centimeters) of a typical Pacific halibut t years old is approximately. (b) How fast is the length of a typical 9-year-old Pacific halibut increasing? (c) What is the maximum length a typical Pacific halibut can attain?
*Monday, April 7, 2014 at 5:15pm*

**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 5:15pm*

**MATH - Algebra**

11x^2 + 22x/11 Am I on the right track? 11(x^2 + 11x)/11 = x^2 + X
*Monday, April 7, 2014 at 5:07pm*

**Math**

thank you I got the same answer! thanks :)
*Monday, April 7, 2014 at 4:57pm*

**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. Thanks
*Monday, April 7, 2014 at 4:56pm*

**Math**

You're welcome. http://www.mathsisfun.com/definitions/multiplicative-inverse.htm
*Monday, April 7, 2014 at 4:56pm*

**Math**

218/245 = 0.889 0.889 * 360 = 320 degrees
*Monday, April 7, 2014 at 4:56pm*

**Math**

Oh! Ok thank you!
*Monday, April 7, 2014 at 4:55pm*

**Math**

6 1/7 =43/7 Multiplicative inverse = 7/43
*Monday, April 7, 2014 at 4:53pm*

**Math**

A survey about the student government program at a school finds that of 245 students: • 218 students like the program • 27 students think the program is unnecessary If a circle graph were made from this data, what would the measure of the central angle be for the ...
*Monday, April 7, 2014 at 4:53pm*

**Math**

What is the multiplicative inverse of 6 1/7? My answer- 16
*Monday, April 7, 2014 at 4:49pm*

**Math, Geometry**

See previous post: Fri,4-4-14,1:14 AM.
*Monday, April 7, 2014 at 4:46pm*

**Math 11**

I am really stuck at these 4 questions. Pls help: a) Two spheres of the same density have a ratio of 9 to 16 inches in surface area, If the small sphere weighs 15 kg what does the sphere weighs. Answer to the nearest 10th of KG. b) The ratio of the volume of two cubes is 216 ...
*Monday, April 7, 2014 at 4:19pm*

**Math**

599/10 = 59.9
*Monday, April 7, 2014 at 3:52pm*

**Math**

4
*Monday, April 7, 2014 at 3:50pm*

**Math word problems**

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 3:36pm*

**Math**

r/h = sin(a) v = 1/3 pi r^2 h = 1/3 pi h^3 sin(a)
*Monday, April 7, 2014 at 3:34pm*

**Math**

A survey about the student government program at a school finds that of 245 students: • 218 students like the program • 27 students think the program is unnecessary If a circle graph were made from this data, what would the measure of the central angle be for the ...
*Monday, April 7, 2014 at 3:32pm*

**math**

all those angles are the standard ones you should know. cot pi/3 = 1/√3 csc pi/3 = 2/√3 cos pi/4 = 1/√2 plug it in and you have (1/√3 + 2/√3)/(1/√2) = √6
*Monday, April 7, 2014 at 3:32pm*

**Math (check)**

thank you!
*Monday, April 7, 2014 at 3:29pm*

**math**

the two legs are a and b, and the hypotenuse is √(a^2+b^2). So, assuming a,b > 0, So, in QII, sin2x = b/√(a^2+b^2) cos2x = -a/√(a^2+b^2) sin^2(x) = (1-cos2x)/2 = (1+a/√(a^2+b^2))/2 = (a+√(a^2+b^2)) / 2√(a^2+b^2) and similarly for cosx
*Monday, April 7, 2014 at 3:29pm*

**Math**

What is the number of tens for 599
*Monday, April 7, 2014 at 3:13pm*

**math**

if tan 2x= -b/a, pi/2 <=2x<=pi, then determine an expression for sinx cosx in terms of a and b. *please show the calculation
*Monday, April 7, 2014 at 3:12pm*

**math**

determine the exact value of (cot pi/3) + (csc pi/3) / (cos pi/4). how is this calculated? i mean the steps to get the exact value?
*Monday, April 7, 2014 at 3:10pm*

**math**

As a fundraiser a school club is sellin posters. The printer charges a $24 set up fee plus $o.20 for each poster. Then the cost y in dollars to print is given by the linear equation y=0.20x+24 A. The printing of 50 posters cost? The printing cost of 100 posters cost? B. Find ...
*Monday, April 7, 2014 at 2:58pm*

**math**

1 rotation = 360° = 2π radians at 7:00 the minute hand is on the 12 (straight up) and the hour hand has moved 7/12 of a rotation (7/12)(2π) = 7π/6 radians ---> or 210° so the smaller angle between the two hands = 2π - 7π/6 = 5π/6 ...
*Monday, April 7, 2014 at 2:57pm*

**math**

πd * 5 = 3.14 *16 * 5 = 251.2 Yep!
*Monday, April 7, 2014 at 2:38pm*

**math**

A grandfather clock shows a time of 7 o’clock. What is the exact radian measure of the angle between the hour hand and the minute hand? how is it calculated?*
*Monday, April 7, 2014 at 2:38pm*

**math**

B. 251.2
*Monday, April 7, 2014 at 2:34pm*

**math**

There are many ways, square with 10m sides, rectangle 2m by 18m, etc….
*Monday, April 7, 2014 at 2:34pm*

**math **

Please answer ASAP.. Awheel has a diameter of 16 cm. Approximately how far does it travel in 5 revolutions? A. 502.4 cm B. 251.2 cm C. 100.48 cm D. 80 cm
*Monday, April 7, 2014 at 2:32pm*

**Math**

It would depend on how you were measuring the temperature. There are two factors operating here. First, the water does lose heat. Second, the body adapts to the temperature, so even without losing heat, the water does not seem as hot. If only a thermometer is being used, that ...
*Monday, April 7, 2014 at 2:29pm*

**Math (check)**

Interpretation #1 : Slant height is the edge of the pyramid Consider the right-angled (internal) triangle formed by the height , half the diagonal of the base and hypotenuse being the slant height. let the slant height be x let the diagonal of the base be d d^2 = 1^2 + 12^2 = ...
*Monday, April 7, 2014 at 2:26pm*

**math**

3/10
*Monday, April 7, 2014 at 2:25pm*

**math**

hgcfy89uygyu
*Monday, April 7, 2014 at 2:24pm*

**Math**

I labelled the position of the church as C. angle C = 85° by the sine law: CP/sin35 = 600/sin85 CP = 600sin35°/sin85° = appr 345.5 m you do CQ
*Monday, April 7, 2014 at 2:02pm*

**Math (check)**

what is the slant height for the given pyramid to the nearest whole unit? with a pyramid base of 12cm and a height of 8cm. MY ANSWER: 14
*Monday, April 7, 2014 at 1:57pm*

**Math**

Erin has 36 Julia has 2/3 as many as Erin ---> she has (2/3)(36) or 24 Julia also has 1/3 as many as Robert 24 = (1/3)(Robert) Robert has 72 Erin has 36 Julia has 24 Robert has 72 for a total of 132
*Monday, April 7, 2014 at 1:56pm*

**math**

how do i build a rectangler pen using 40 meters
*Monday, April 7, 2014 at 1:46pm*

**Math**

Two towers P and Q are 600m apart with P being due east of Q. A church is on a bearing of 210 degrees from P and 125 degrees from Q. Find the distance of the church from P and Q.
*Monday, April 7, 2014 at 12:56pm*

**Math **

Julia has 1/3 has many stamps as Robert and also 2/3 as many stamps as erin. if erin has 36 stamps, what is the total number of stamps that the 3 children have?
*Monday, April 7, 2014 at 12:31pm*

**Math**

Find the volume of a right circular cone of height h and semi-vertical angle a (Hint: Rotate about the x-axis).
*Monday, April 7, 2014 at 12:11pm*

**Math**

So I have some questions that start with Do the data sets have a positive, a negative or no correlation? Can anyone help explain what this means? An example is "The amount of time spent in the bathtub and the temperature of the bath water." I am confused, thank you.
*Monday, April 7, 2014 at 12:07pm*

**Bridge Math**

The inequality 2003-09-04-00-00_files/i0280000.jpg models all of the combinations of scores of 20 and 30 points that will give a total greater than 400 points in a game. What is not true about the values for x and y?
*Monday, April 7, 2014 at 12:02pm*

**Math (?)**

It would help if you proofread your questions before you posted them. Insufficient data.
*Monday, April 7, 2014 at 11:54am*

**math**

We cannot help unless you state the specific problem.
*Monday, April 7, 2014 at 11:48am*

**math**

need help with math assessment lesson 7
*Monday, April 7, 2014 at 11:19am*

**math-urgent**

Sample space ={1,2,3,4,5} p(1)=0.1, p(2)=0.2 and p(3)=p(4)=0.05. Assume that A={1,3,5} and B={2,3,4}. Find p(5). Find p(A^c). I need help with this question. It is a probability question. please help.
*Monday, April 7, 2014 at 10:49am*

**Math**

Thinking of the doubling rate, we can see that after t hours, the population is P(t) = 50 * 2^(2t) = 50*4^t So, we want 50*4^t = 1000000 4^t = 20000 t log4 = log 20000 t = log20000/log4 = 7.14 hours
*Monday, April 7, 2014 at 10:33am*

**Math**

How about this pattern term(1) = 6 = 3(2^1) term(2) = 12 = 3(2^2) term(3) = 24 = 3(2^3) term(4) = 48 = 3(2^4) .... term(23) = .... = 3(2^23) term(n) = .....
*Monday, April 7, 2014 at 8:04am*

**Math**

6,12,24,48,96...... How can you define the nth term
*Monday, April 7, 2014 at 7:51am*

**math**

how about .15 * 63.00 = ?
*Monday, April 7, 2014 at 4:39am*

**Statistics / Math**

Calculate the standard deviation for: 10, 20, 30 to the nearest tenth presuming a sample
*Monday, April 7, 2014 at 12:41am*

**Discrete Math**

just make your usual Venn diagram and start labeling the intersections.
*Monday, April 7, 2014 at 12:20am*

**businss math**

c
*Sunday, April 6, 2014 at 11:41pm*

**math**

The wheelers' bill at a restaurant is $63.00.How much money should Mr.Wheeler leave as a tip 15%?
*Sunday, April 6, 2014 at 11:35pm*

**Discrete Math**

There are 150 students taking Discrete Mathematics II, Calculus II, and Physics I courses. Of these 51 are taking Discrete Mathematics II, 111 are taking Calculus II, and 63 are taking Physics I. There are 41 taking Discrete Mathematics II and Calculus II, 32 students taking ...
*Sunday, April 6, 2014 at 11:29pm*

**Math age problem**

James is 35 years older then chris. If chris 55 years old now, how old is chris
*Sunday, April 6, 2014 at 10:51pm*

**Math**

Thanks
*Sunday, April 6, 2014 at 10:30pm*

**Math**

2.7^3 = 19.683 15 * 19.683 = 295.245
*Sunday, April 6, 2014 at 10:14pm*

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