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April 24, 2014

Homework Help: Math

Branches of Math

Recent Math Questions

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

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

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

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

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
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
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
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 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 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
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
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
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
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 (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
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

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

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
The volume of the cylinder is 15 cubic inches. If all the dimensions are multiplied by 2.7 what is the new volume? My Answer- 295.245
Sunday, April 6, 2014 at 10:09pm

Math
The growth rate of Escherichia coli, a common bacterium found in the human intestine, is proportional to its size. Under ideal laboratory conditions, when this bacterium is grown in a nutrient broth medium, the number of cells in a culture doubles approximately every 30 min. (...
Sunday, April 6, 2014 at 9:00pm

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...
Sunday, April 6, 2014 at 8:59pm

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?
Sunday, April 6, 2014 at 8:55pm

Math
A radioactive substance decays according to the formula Q(t) = Q0e−kt where Q(t) denotes the amount of the substance present at time t (measured in years), Q0 denotes the amount of the substance present initially, and k (a positive constant) is the decay constant. (a) ...
Sunday, April 6, 2014 at 8:54pm

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.)
Sunday, April 6, 2014 at 8:53pm

Math
During a flu epidemic, the number of children in the Woodbridge Community School System who contracted influenza after t days was given by the following. Q(t) = 7000/1+249 e−0.6 t (b) How many children had the flu after 10 days?
Sunday, April 6, 2014 at 8:52pm

MATH
Which expression is a polynomial???? A: 11 0ver the square root of x B: square root of 11 times x C: x - square root 11 D: 11 over the square root of x to the 2nd power (sorry I am not sure how to insert square root symbols or fractions, so u have to imaging its there) thank ...
Sunday, April 6, 2014 at 7:37pm

Math
Alex's favorite restaurant is a buffet-style Chinese restaurant downtown. Each time he goes, he chooses 2 appetizers and 1 entree. If the restaurant has four appetizers and 5 entrees to choose from, how many, times could Alex go to the restaurant without choosing the same ...
Sunday, April 6, 2014 at 7:20pm

math
Mr. Benedict left half of his estate to his wife, one-fourth to his son, one-fifth to his daughter and the remainder, $5000 to his college. What is the total amount left by Mr. Benedict? a. $ 9,250 b. $ 10,000 c. $ 16,000 d. $ 50,000 e. $ 100,000 please answer and explain
Sunday, April 6, 2014 at 6:25pm

Math
What are mathematical concepts are used to make string art?
Sunday, April 6, 2014 at 6:21pm

math
A rectangular piece of cardboard 9" x 12" is made into an open box by cutting a 2 1/2" square from each corner and bending up the sides. Find the volume of the box if no allowance is made for overlapping of the edges. a. 70 cu. in. b. 154 3/8 cu. in. c. 195 cu. ...
Sunday, April 6, 2014 at 5:50pm

Math
A triangular prism has a volume of 92 in.³ if all dimensions are multiplied by 1.6 what is the new volume?
Sunday, April 6, 2014 at 4:59pm

math
Two stations, A and B, are located six miles apart on a railroad. The rates of cartage of coal are 50 cents per ton per mile from A and 75 cents per ton per mile from B. At a certain consumer's home, located on the railroad between A and B, the cost for cartage is the same...
Sunday, April 6, 2014 at 4:35pm

math
A 50 foot ladder is placed against a building so that it touches a point 40 feet above the ground. The distances ( in feet ) from the foot of the ladder to the building is a. 10 b. 20 c. 30 d. 45 e. 60 please answer and explain
Sunday, April 6, 2014 at 4:30pm

Math
You are about to leave for vacation, but you forgot your socks! You go back to your room but lights are out, can't see. You remember that in your draw you have 10 pair black, 10 pair white and 11 pair blue all mixed up. How many socks do you need to take out to be SURE you...
Sunday, April 6, 2014 at 4:00pm

Math/Physics
Problem Question: Rashad started The 780km drive from Sault st. Marie to Ottawa at 09:00. His average speed was 100km/h. Two hours later Tyson left Ottawa for Sault St. Marie. He drove at 80km/h on the same highway. How far from Ottawa, and what time of day did they meet?
Sunday, April 6, 2014 at 12:26pm

Math
Volume of a cylinder is 15 cubic inches. If all the dimensions are multiplied by 2.7 what is the new volume?
Sunday, April 6, 2014 at 12:23pm

Math
Square miles 66, 000 and 1, 000, 000 people. Population density is a rate that is indicates how crowed and area is. A proportion is used to find population density, or number of persons per square mile. Population/area = number of persons/1 square mile. Which of the following ...
Sunday, April 6, 2014 at 12:05pm

Math
The surface area of a prism is 54 square inches. What is the surface area of a similar prism that is smaller by a scale of 1/3? My answer- 6
Sunday, April 6, 2014 at 11:56am

Math
Jane has a pizza shop. She has 1 type of crust, 1 type of sauce and 6 toppings. How many 2 topping pizzas can she make. Note the same topping can't be used for 1 pizza
Sunday, April 6, 2014 at 11:20am

Math
A closed box has a height which is two times it’s width. The length is 15 cm less than five times the width . What is the domain and range for the surface area function ?
Sunday, April 6, 2014 at 8:56am

Math (Trigonometry)
1. If sec x + tan x = 3/2 and 0 ≤ x ≤ pi/2 then the value of sin x is... 2. If 0 ≤ x ≤ pi/2 and tan²x + sec x = 5 then cos x = ... Please help
Sunday, April 6, 2014 at 8:54am

math
Which of these phrases is correct? A 9 is a multiple of 3 and a factor of 12. B 9 is a factor of 45 and a multiple of 5. C 9 is a multiple of 6 and a factor of 72. D 9 is a factor of 54 and a multiple of 3.
Sunday, April 6, 2014 at 8:42am

math
Who am I? I have 2 in the ten thousands and the units place. The rest of my digits are 0.
Sunday, April 6, 2014 at 8:26am

math
.An angle is 10° more than the measure of its complement. Find the number of degrees in each angle.The angles measure _ degrees.
Sunday, April 6, 2014 at 1:41am

math
An alloy of copper is 10% copper and weighs 25 pounds. A second alloy is 18% copper. How much (to the nearest tenth lb.) of the second alloy must be added to the first alloy to get a 13% mixture.
Sunday, April 6, 2014 at 1:31am

math
how many ways can you choose 3 dishes from a menu of 8? my answer is 56
Sunday, April 6, 2014 at 12:01am

Math
Identify the extraneous solution when solving √x+2= x
Saturday, April 5, 2014 at 11:16pm

Math
Identify the extraneous solution when solving √x+2= x
Saturday, April 5, 2014 at 11:08pm

Math
what is the degree of the polynomial 4x-2+5x^2?
Saturday, April 5, 2014 at 10:58pm

Math
A radioactive substance decays according to the formula Q(t) = Q0e−kt where Q(t) denotes the amount of the substance present at time t (measured in years), Q0 denotes the amount of the substance present initially, and k (a positive constant) is the decay constant. (a) ...
Saturday, April 5, 2014 at 10:05pm

Math
During a flu epidemic, the number of children in the Woodbridge Community School System who contracted influenza after t days was given by the following. Q(t) = 7000 1+249 e−0.6 t (a) How many children were stricken by the flu after the first day? (b) How many children ...
Saturday, April 5, 2014 at 10:04pm

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.)
Saturday, April 5, 2014 at 10:04pm

Math
The length (in centimeters) of a typical Pacific halibut t years old is approximately f(t) = 190(1 − 0.955e−0.25t). 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 ...
Saturday, April 5, 2014 at 10:01pm

Math
The growth rate of Escherichia coli, a common bacterium found in the human intestine, is proportional to its size. Under ideal laboratory conditions, when this bacterium is grown in a nutrient broth medium, the number of cells in a culture doubles approximately every 30 min. (...
Saturday, April 5, 2014 at 9:59pm

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...
Saturday, April 5, 2014 at 9:58pm

Math
Skeletal remains had lost 84% of the C-14 they originally contained. Determine the approximate age of the bones. (Assume the half life of carbon-14 is 5730 years. Round your answer to the nearest whole number.)
Saturday, April 5, 2014 at 9:57pm

Math
what is the degree of the polynomial 4x-2+5x^2?
Saturday, April 5, 2014 at 9:44pm

SAT math
A family of 2 parents and 4 children is eating lunch at a rectangular table with 2 chairs on each side and one chair on each end. In how many ways can they be arranged if the two parents sit in the two end chairs? a. 12 b. 30 c. 36 d. 48 e. 720
Saturday, April 5, 2014 at 8:30pm

Math
Convert- 94 gal/h=______L/min
Saturday, April 5, 2014 at 8:08pm

Math
How can you arrive at the distance between nail holes in string art. Mathematical concepts observed in string art
Saturday, April 5, 2014 at 7:37pm

math
If a 1,000 unit vitamin D is equal to 10 glasses of milk how many glasses are in a 50,000 unit vitamin D?
Saturday, April 5, 2014 at 7:20pm

Math
The surface area of a prism is 54 square inches. What is the surface area of a similar prism that is smaller by a scale of 1/3?
Saturday, April 5, 2014 at 7:09pm

Math
Can someone help me with this? Convert: 48lb/gal=____oz/qt
Saturday, April 5, 2014 at 6:34pm

math
On a rectangular piece of cardboard with perimeter inches, three parallel and equally spaced creases are made (see Figure 1). The cardboard is then folded along the creases to make a rectangular box with open ends (see Figure 2). Letting represent the distance (in inches) ...
Saturday, April 5, 2014 at 6:29pm

Math
Find the exact length of the curve. x = 5cost - cos5t, y = 5sint - sin5t, 0 < t < pi
Saturday, April 5, 2014 at 5:54pm

math
A rental agent is renting a space for $7.50 a square foot. If you require a space 36 ft. by 16 ft., what will be the rental on that space?
Saturday, April 5, 2014 at 5:49pm

math
Take west to be the positive direction. The height of a sloped roof above the place where I stand is h = 12 feet (see the figure below). If I move 3 feet west, the height is 10 feet. If I move 2 additional feet west, what is the height of the roof above the place where I stand?
Saturday, April 5, 2014 at 5:24pm

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