Branches of Math
Recent Math Questions
A restaurant manager lost $415 in business during the month of January. Business picked up in February, and he ended the month with a profit of $1580. What was the managers profit after January and February?
Wednesday, August 20, 2014 at 11:53pm
Dominic collects sports science fiction and history books. He has 21 books about sports, 35 books about science fiction, and 14 about history. He wants the same number of each type of book on each shelf. What is the greatest number of each type of book on each shelf?
Wednesday, August 20, 2014 at 10:27pm
7th grade Math/Science
Can you help me with this science question: from sea level, the biosphere goes up about 9km and down about 19km. What is the thickness of the biosphere in meters? (there wasn't a formula in the workbook). Thanks
Wednesday, August 20, 2014 at 10:14pm
what is the margin of error for a simple random sample of 900 people with a standard deviation of 13.5 at 95% level of confidence How do you write this question in the right formula, please? I believe I can calculate the problem, I don't know how to write it. 900 2.5 and 1...
Wednesday, August 20, 2014 at 10:02pm
What is the probability of obtaining exactly three heads in four flips of a coin, given that at least two are heads? (Enter the probability as a fraction.) I keep getting 2/3 but its wrong. Help!!
Wednesday, August 20, 2014 at 8:12pm
9. Three cards are drawn at random from a standard deck of 52 card, without replacement. What is the probability of drawing a 7, drawing a 9, and a king in that order?
Wednesday, August 20, 2014 at 5:45pm
6. In a survey of 100 people, 73 owned only stocks. Six of the people invested in both stocks and bonds. How many people owned bonds only? This is what I did: 73+6=79 100-79=21
Wednesday, August 20, 2014 at 5:41pm
To construct a copy of an angle ABC, the material that is Not necessary is A.) Protractor B.) Compass C.) Ruler or Straightedge D.) Pencil I think it is A.) Protractor Thank You.
Wednesday, August 20, 2014 at 3:25pm
Math: Please help
Which of the following must be true about a the bisectors of a segment in a plane? A. Every segment has exactly one bisector. B. Every segment has exactly two bisectors.****** C. Every segment has 10 bisectors. D. Every segment has infinitely many bisectors. I think the right ...
Wednesday, August 20, 2014 at 2:57pm
The standard deviation of test scores on a certain achievement test Is 11.3. If a random sample of 81 students had a sample score of 74.6 , find a 90% confidence interval estimate for the average score of all students.
Wednesday, August 20, 2014 at 2:54pm
SID WROTE 541,309 ON HIS PAPER. USING NUMBERS AND WORDS EXPLAIN HOW THE NUMBER WOULD CHANGE IF HE SWITCHED THE DIGITS IN THE HUNDRED THOUSANDS AND TENS PLACES
Wednesday, August 20, 2014 at 2:46pm
A population distribution is known to have standard deviation 20. Determine the p value of a test of the hypothesis that the population mean is equal to 50, if the average of a sample of 64 observations is a) 52.5 , b) 55.0 , c) 57.5
Wednesday, August 20, 2014 at 2:39pm
Fifty numbers are rounded off to the nearest integer and then summed. If the individual round off errors are uniformly distributed between -0.5 and 0.5 , what is the approximate probability that the resultant sum differs from the exact sum by 3.
Wednesday, August 20, 2014 at 2:37pm
A circular track is 1000 yards in circumference. Cyclists A, B, and C start at the same place and time, and race around the track at the following rates per minute: A at 700 yards, B at 800 yards, and C at 900 yards. What is the least number of minutes it mus take for all ...
Wednesday, August 20, 2014 at 2:01pm
On a coordinate system, the segment joining the points (3,8) and (9,16) has the same midpoint as the line segment joining the points (8,11) and (x,13). What is the value of x? I think x=3
Wednesday, August 20, 2014 at 12:56pm
1. A gallon of a certain kind of paint will cover 224 square feet of surface. In painting two walls; one 36 by 8 and the other 24 by 9, the number of gallons of paint used is: 2. Susan wants to use blue, yellow, green, and pink paint to decorate her ...
Wednesday, August 20, 2014 at 11:47am
Suppose that the 6-month US Treasury bill rate is equal to 5% and the forward rate on a 6-month Treasury bill 6 months from now is 7.24%. (both in yearly terms). What is the rate of a 1-year bill?
Wednesday, August 20, 2014 at 9:46am
A (yearly) cash flow stream is x=(-40,10,10,10,10,10,10). The spot rates are (yearly in percentage) s=(5.0,5.3,5.6,5.8,6.0,6.1). Use the discount factors to determine the (net) present value of the stream.
Wednesday, August 20, 2014 at 8:39am
58. Let GCF (x,y) represent the greatest common factor of x any y. If p is a positive even integer less than 11, for what value of p does GCF (p^2,81) have the greatest value?
Tuesday, August 19, 2014 at 8:08pm
Evan is painting a stool that has a cylindrical seat and four rectangular prism legs. The seat has a diameter of 10 inches and a height of 3 inches. Each leg is 3 inches by 3 inches by 12 inches. How much area will Evan have to paint. use 3.14 for pi show your work
Tuesday, August 19, 2014 at 6:21pm
A printing company determines that to print a large format poster, it costs $75 to set up the production process. Each poster that is printed costs $22 in material and labor. The printing company sells these posters to marketing firms for $60 each. Find a linear model P that ...
Tuesday, August 19, 2014 at 5:03pm
Mr. Corbin is a salesman. He gets a 5% commission on all sales between $100 and $500 and a 10% commission on all sales above $500. His commission on sales of $783 was:
Tuesday, August 19, 2014 at 3:14pm
1. Mr. Corbin is a salesman. He gets a 5% commission on all sales between $100 and $500 and a 10% commission on sales of $783 was: 2. Of the students who tried out for the baseball team, 1/8 tried out as catchers, 1/3 as infielders, and 1/4 as outfielders. The fraction of the ...
Tuesday, August 19, 2014 at 3:05pm
52. The mean of twenty numbers is 34. If four of the twenty numbers have a mean of 45, what is the mean of the other sixteen numbers? This is what i did: Is this right? 20x34=680 4x20x45=3600 3600+680/16=267.5 answer:267.5
Tuesday, August 19, 2014 at 2:43pm
50. 5 years ago, Jack was six less than twice of Kelly's current age. If Kelly was 20 years old three years ago, how old will be jack in 10 years? This is what I did: I got 55 J=(2k-6)+5 K=23 (2x23-6)+5 =45 45+10=55
Tuesday, August 19, 2014 at 2:39pm
A (yearly) cash flow stream is x=(-40,10,10,10,10,10,10). The spot rates are (yearly in percentage) s=(5.0,5.3,5.6,5.8,6.0,6.1). Use the discount factors to determine the (net) present value of the stream. (I got a little confused here. Should I 1. use the running present ...
Tuesday, August 19, 2014 at 11:08am
Starting from today, every month you save $500 into a bank account with earns interest at an annual rate of 4%. How much money do you have in the account at the end of 4 years? My working is F=R(((1+i)^n)-1)-i where R=500, i=1/300 and n=48. Ans=$25,979.80 Am I solving it ...
Tuesday, August 19, 2014 at 9:40am
. A factory employing a large number of workers finds that over a period of time , the average absentees rate is three workers per shift. Calculate the probability that in a given shift (i)exactly two workers will be absent , (ii)more than four workers will be absent .
Tuesday, August 19, 2014 at 6:56am
A class us planning a party. A pizza restaurant cuts each pizza into 8 slices. There are 32 students. How many pizzas does the class need to order for each student to have a slice? Explain
Monday, August 18, 2014 at 10:17pm
Teaching in Early childhood progras
Self appraisals should not be used to assess which of the following? A. Math concepts B. Dispositions regarding tasks C. IEP adherence D. Literacy my answer is c.
Monday, August 18, 2014 at 9:18pm
If a plane flies due north for 70km, then due west for 145km, what would the compass bearing be for the plane from its starting point? Please email me once you have the result at firstname.lastname@example.org
Monday, August 18, 2014 at 8:53pm
the distance between DELHI TO Meerut is 75km two trains speed of 100km/h & 80 km/h leave the two station at 8am towards each other at what time will they pass each other
Monday, August 18, 2014 at 8:36pm
which numbers should you add to estimate the answer to this problem: 87,087 + 98.000 - 88,000+ 98,000 -85,000+95,000 - 87,000 +98,000 - 80,000+ 90,000 thanks for your help!
Monday, August 18, 2014 at 5:03pm
thanks damon! u rock! another quick question....how do you estimate the total precipitation in inches and the total number of days with precipitation asheville and wichita asheville= 47.71 inches 124 days wichita = 28.61 inches 85 days
Monday, August 18, 2014 at 4:42pm
estimate the total weight of two boxes that weigh 9.4lb and 62.6 lb using rounding and compatible numbers. Which estimate is closer to the actual total weight? why? thanks!
Monday, August 18, 2014 at 4:26pm
The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length The length of a rectangle is 7 m less than triple the width. If w represents the width, write an expression for the length, l.
Monday, August 18, 2014 at 12:50pm
Eric received 76 tokens to use in the arcade at the pizza restaurant. Which of the following inequalities represents the number of tokens Eric used in the arcade? x < 76 x < 76 x > 76 x > 76
Monday, August 18, 2014 at 11:02am
Starting from today, every month you save $500 into a bank account with earns interest at an annual rate of 4%. How much money do you have in the account at the end of 4 years?
Monday, August 18, 2014 at 9:50am
The leng of the smaller rectangle is 1 inch less than twice its wide. both the dimensions of the larger rectangle are 2 inches longer than the smaller rectangle. the area of the shaded region is 86 square inches. what is the area of the smaller rectangle?
Sunday, August 17, 2014 at 9:33pm
Assign variables for the following problem (you do not need to solve the problem) Thirty fluffaluff trees are introduced on an island at the start of year zero. At the start of thirty there are 55 fluffaluff trees. Use the fluffaluff formula to find how many fluffaluff trees ...
Sunday, August 17, 2014 at 9:25pm
evaluate the limit as x approaches 0 from the right. of the function xcos(1/x) I know the answer is O but I am not sure as of my reasoning. I just that that since cos(1/x) is being multiplied by a number approching 0 that the whole limit would be o.
Sunday, August 17, 2014 at 2:17pm
a computer is being lowered into the ocean from a platform. at this moment it is 210 feet below surface and being lowered 150 feet every 30 minutes. how to write this in the form of an expression?
Sunday, August 17, 2014 at 12:13pm
A swimmer S is in the sea at a distance of 4km from the closest point A on a straight shore.His house B is on the shore at a distance 5km from A.He can swim at a speed of 3km/hr.The distance of the point on the shore from B so that he reaches his home in the minimum time is=?
Sunday, August 17, 2014 at 10:27am