Branches of Math
Recent Math Questions
a drug is supplied as a 20 mg/ml solution in a 50 ml vial. you need to make 15 ml of a 10 mg/ml solution. how much concentrate and how much diluent are needed to obtain the desired final volume?
Wednesday, July 9, 2014 at 11:29pm
Suppose that the height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. After hours of burning, a candle has a height of centimeters. After hours of burning, its height is centimeters. What is the height of the candle ...
Wednesday, July 9, 2014 at 10:50pm
How do I work this problem? A license plate is to consist of 2 letters followed by 5 digits. Determine the number of different license plates possible if repetition of letters and numbers is not permitted. is this correct 26*26*10*10*10*10*10= 67,600,000
Wednesday, July 9, 2014 at 10:39pm
Shantle and Kwamie are planning to buy their first home. Although they are excited about the prospect of being homeowners, they are also a little frightened. A mortgage payment for the next 30 years sounds like a huge commitment. They visited a few developments and scanned the...
Wednesday, July 9, 2014 at 10:31pm
A random sample was taken from the normal IQ population, which has μ = 100 and σ = 15. ALL INFORMATION IS GIVEN: We gave a random sample of 25 undergrad students (n = 25) a new study pattern to see if it increases their IQ score. The samples mean IQ score is 112. The...
Wednesday, July 9, 2014 at 9:19am
Parametrically represent a Mobius strip. Since I am very unfamiliar with this topic, Math jargon should appear as little as possible and please provide step by step working.
Wednesday, July 9, 2014 at 9:17am
student is taking up midterm exam for 3 minutes left to answer 10 remaining question of which there are 4 choices of answers for each question with only one choice correct. what is the probability of getting more than 5 of his answer is correct
Wednesday, July 9, 2014 at 8:47am
It has been found out that the probability that a child is a male in family is 0.4. In a family of 6 children, what is the probability that; i. exactly 5 are boys ? ii. at least 4 are boys ? iii. all boys
Wednesday, July 9, 2014 at 6:07am
Write an expression for all of the vertical asymptotes of y=-3 csc(pi/4 *x) Can you list step by step to show how to do it , I don't understand this problem !!! Thanks
Wednesday, July 9, 2014 at 1:27am
I have 3 questions: 1) If ABC and DEF are three- digit numbers, which of the following could be the number of digits in the product of ABC and DEF? i. 4 ii. 5 iii. 6 I don't have the vaguest idea on how to do this and what type of math it is part of... My answer is 6 only ...
Tuesday, July 8, 2014 at 11:20pm
the time required for one complete oscillation of a pendulum is called its period. if the length L of the pendulum is measured in feet and the period P n seconds, then the period is given by P=2¶(L/g)^1/2, where g is constant. use differentials to show the percentage ...
Tuesday, July 8, 2014 at 10:00pm
5.Escape velocity is the speed necessary to escape the gravitational pull of a plant. The escape velocity of Earth is 11.3 kilometers per second, while the escape velocity of Saturn is 310% of that. What is the escape velocity of Saturn?
Tuesday, July 8, 2014 at 5:39pm
3.Students at one school sell magazine subscriptions to raise money for athletic equipment. The school keeps 20% of sales. How many dollars worth of subscriptions must be sold to make $1500?
Tuesday, July 8, 2014 at 5:31pm
Write a formula expressing the information: i)Rose paid twice as much as Mike I used R for Rose and M for Mike The formula I cam up with is R=2M ii)Taxes are 6 percent of income [Use T and x] So I wrote it like this T(0.06)/X iii)There are twenty times as many students as ...
Tuesday, July 8, 2014 at 5:25pm
It is important for Bob to have a gross salary in his fifth year of at least $100,000. He is promised salary increases of 3 percent per year in the second and third years and 5 percent thereafter. What must be his starting salary be to achieve his goal? My original answer was...
Tuesday, July 8, 2014 at 11:56am
In an examination a candidate is given the four answers to four questions but is not told which answer applies to which question. He is asked to write down each of the four answers next to its appropriate question. b). show that there are 6 ways of getting just two answers in ...
Tuesday, July 8, 2014 at 11:21am
In order for a spacecraft to reach Earth's orbital velocity, it must achieve a speed of 17,500 mph in 610 seconds after its first stage burnout where it should have achieved a speed of 1530 mph. What percent increase in speed per second is necessary after first stage in ...
Tuesday, July 8, 2014 at 11:20am
I need help solving for x here (I dont get the right answer, which is supposed to be x=0.137) 3.88 = 3.74 + log (x/0.1) Please explain how you would get that answer Thank you
Tuesday, July 8, 2014 at 6:30am
need word problem help. One half of the total budget of $5,000 was for salaries. Three fifths of that amount was paid to 4 employees. How much of the budget was spent on employees? 1/2 of 5,000 = 2,500 2500 divided by 3/5 = 4166 2/3 Am I on the right track?
Tuesday, July 8, 2014 at 2:00am
Assume 450,000 people line up on the streets to see the Macy's Thanksgiving Parade in 2010. If attendance is expected to increase 30%, what will be the number of people lined up on the street to see the 2011 parade?
Tuesday, July 8, 2014 at 1:15am
Encircle the error in the following "proof" that the two arbitrary numbers are equal to each other. Let a and b the arbitrary numbers such that a is not equal to b. Then, (a - b)^2 = a^2 - 2ab + b^2 = b^2 - 2ab + a^2 (a - b)^2 = (b - a)^2 a - b = b - a 2a = 2b a = b
Monday, July 7, 2014 at 11:41pm
Find the monthly payment. Mortgage amount Annual percentage rate 2. $146,800 5.25% 30 years 4. $113,400 5% 15 years 6. Find the interest paid the mortgage in exercise 2. 8. Find the total interest paid for the mortgage in exercise 4.
Monday, July 7, 2014 at 10:46pm
In interviewing November's statement she notices that her beginning balance was $600 and that she made a $200 payment on November 10. She also charged purchases of $80 on November, 5, $100 on November 15, and $50 on November 30. She paid $5.27 in interest the month before...
Monday, July 7, 2014 at 10:37pm
A group of 10 students have average of GPA of 2.8 with SD of 0.3. Does this group present enough evidence to indicate that the average GPA is less than 3.0? Make your decision at a 5% level of significance.
Monday, July 7, 2014 at 6:29pm
There are 60 coins in a box containing only nickels, dimes, and quarters. If there is one more than twice as many dimes as quarters, and the total value of all dimes is five cents less than the total value of all nickels, how many of each denomination are in the box?
Monday, July 7, 2014 at 5:43pm
17. Jenny, Greg, & Hank gather their marbles and have 20 in total. If Jenny has 3 less than twice the number Greg has, and Hank has 1 less than Greg has, how many marbles do each of them have?
Monday, July 7, 2014 at 4:31pm
If refinishing your basement at a cost of $44,568 would add $18,520 to the resale value of your home, what percent of your cost is recouped? (Round to the nearest percent.)
Monday, July 7, 2014 at 3:10pm
the population of Erik's school increased by 5% from last year to this year. This year, there were 15 more students in his school than last year. How many students were in Erik's school last year?
Monday, July 7, 2014 at 12:24pm
There are 25 red beads,x blue beads and y green beads in a box.When a bead is picked at random,the probability that it is blue is 1 over 4 and the probability that it is green is 1 over 3. (a)Find the value of x and y. (b)How many blue beads must be added so that the ...
Monday, July 7, 2014 at 11:37am
In a bag,there are 18 cards of which x cards are coloured and the rest are white.When another 6 white cards are added into the bag,the probability of a white card being picked is x over 8.Find the value of x. Answer:6 How?
Monday, July 7, 2014 at 10:23am
Find the discount (ordinary interest) and proceeds on a promissory note for $2,000 made by Barbara Jones on February 10, 2007, and payable to First State Bank on August 10, 2007, with a discount rate of 9%.
Sunday, July 6, 2014 at 10:40pm
When x is increased by 5, the result is 60% of increasing x by 15. What is the value of x? I got this far: x+5 = 0.60(x+15) x+5 = 0.60x + 9 x = 0.60x + 4 What is the next step?
Sunday, July 6, 2014 at 7:33pm
Malinda Levi borrows $12,000 on a 9.5% , 90 day note. On the 30th day, Malinda pays $4,000 on the note. If ordinary interest is applied, what is Malindas adjusted principal after the partial payment? What is the adjusted balance due at maturity?
Sunday, July 6, 2014 at 6:30pm
The finance charge on a copier was $1,778. The loan for copier was to be paid in 18 monthly payments. Find the finance charge refund if it is paid off in eight months.
Sunday, July 6, 2014 at 6:28pm
vacuum cleaner was purchase on the installment plan with 12 monthly payments $36.98 each. If the cash price was $415 and there was no down payment , find the annual percentage rate.
Sunday, July 6, 2014 at 5:23pm
Describe one of the following experiments, which study human subjects, in 450 to 750 words: A pharmaceutical company wants to test a new sleep aid. An educational company is interested in determining whether their new math curriculum will raise standardized test scores. ...
Sunday, July 6, 2014 at 4:50pm
Using the maximum ratios for a conventional mortgage, how big a monthly payment could the Taylor family afford if their gross ( before- tax) monthly income amounted to $ 3,500? Would it make any difference if they were already making monthly installment loan pay-ments totaling...
Sunday, July 6, 2014 at 3:48pm
Mang jose wants to make a table which has an area of 6m, the length of the table has to be 1m longer than the width. If the width of the table is p meters, what will be the length. Form a quadratic equation that represent the equation.
Sunday, July 6, 2014 at 8:21am
there are seven consecutive even numbers .if the largest no is x write an algebraic expression for the middle no . if the middle no is 48 find the value of smallest no
Sunday, July 6, 2014 at 7:54am
this code has five digit 1,2,3,4,5. the first digit plus the second digit is equal to the third digit the second digit twice times the first digit the second digit is half the fourth digit and the fifth digit is the sum of the first and fourth digits. what is the answer?
Saturday, July 5, 2014 at 4:49am
Find (a) the exact interest and (b) the ordinary interest. Round answers to the nearest cent Malinda Levi borrows $12,000 on a 9.5% , 90 day note. On the 30th day, Malinda pays $4,000 on the note. If ordinary interest is applied, what is Malindas adjusted principal after...
Saturday, July 5, 2014 at 12:07am
Find (a) the exact interest and (b) the ordinary interest. Round answers to the nearest cent Find the discount (ordinary interest) and proceeds on a promissory note for $2,000 made by Barbara Jones on February 10, 2007, and payable to First State Bank on August 10, 2007, with ...
Saturday, July 5, 2014 at 12:06am
Myrna Lewis wishes to have $4,000 in four years to tour Europe. How much must she invest today at 8% interest compounded quarterly to have $4,000 in four years? $4000 = x(1+ 0.02)^16 =$2,913.78
Friday, July 4, 2014 at 11:53pm