Friday
April 18, 2014

Homework Help: Math

Branches of Math

Recent Math Questions

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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

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/mu​ltiplicative-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~
!@#$%^& uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu​uuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuuu​uuuuuuuuuuuuuuuuuuuuuu !@#$%^&hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh​hhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhhh
Monday, April 7, 2014 at 4:25pm

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

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