12/22/14

Closed and Open Intervals? Differential Calculus
If I am told to find critical numbers on the closed interval [0,2pi], are 0 and 2pi acceptable answers??? or is that only for the open interval (0,2pi)??
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12/22/14

Please help! Mrs. Meckley wants to build a swimming pool surrounded by a sidewalk of uniform width. How wide should the sidewalk be
Mrs. Meckley wants to build a swimming pool surrounded by a sidewalk of uniform width. She wants the dimensions of the pool and sidewalk to be 26 meters by 20 meters. The pool has an area of 216... more
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12/22/14

Please can someone help me with this problem?
 To finance her community college education La Tonya takes out a student loan for $3500. After a year, La Tonya decides to pay off the interest, which is 4.50% of $3500. How much will she pay?
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12/20/14

how to find the number
he sum of twice a number and sixteen less then the number is the sme as the difference between -36 and the number what is the number
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12/20/14

The volume V of a right circular cylinder of height h and radius r is V=pr^2h. If the height is twice the radius, express the volume V as a function of r
please help.
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12/20/14

if a line has a slope of 2 and passes through (4,-1) what is the y-intercept?
so confused please help :/
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12/20/14

How many words can be made of the word mathematics?they can be either 1,2,3,4,5,6,7,8,9,10 or 11 lettered. PLEASE GIVE THE STEPS TO SOLVE IT THANX A LOT!!!!!
How many words can be made of the word mathematics?they can be either 1,2,3,4,5,6,7,8,9,10 or 11 lettered.PLEASE GIVE THE STEPS TO SOLVE ITTHANX A LOT!!!!!
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12/19/14

algebra word problem
A candle that has been burning for two minutes is eight inches long. That same candle is seven and one-quarter inches long after burning three minutes. Assume that the candle will burn at the same... more
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12/19/14

Triangle peremiter question. Please help!
One side of a triangle has length of 12cm and the second side is 3cm longer than the third side. Find the lenth if the perimeter is 72cm.
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12/19/14

0 0 How many liters of 20% alcohol solutions must be mixed with 60 liters of a 90% solution to get a 70% solution need to find liters of a 70% solution
0 0How many liters of 20% alcohol solutions must be mixed with 60 liters of a 90% solution to get a 70% solutionneed to find liters of a 70% solution
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12/18/14

Please solve in order and show
Wendy goes to school at a fancy private institute in Singapore.  The institute is in a high rise building of twenty five stories and a penthouse.  Each floor is 12 feet high, with an added space of... more
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12/17/14

Algebra 2 quadratic function help
write the equation of the quadratic function with roots -9 and -3 and a vertex at (-6,-1)
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12/17/14

How much would you need to invest now in a savings account that pays an APR of 8%
compounded monthly in order to have a future value  of $6000. in a year and a half? The answer is $5323.64. I can't get the formula to give me this answer. :(
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12/17/14

prove identity
Sin/ 1-cosx - 1/sin= 1/tanx   prove the identity  
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12/17/14

The half life of iodine 131 is approximately 8 days. What is the decay rate of iodine 131?
I'm studying for my final and I'm confused on this question. The half life of iodine 131 is approximately 8 days. What is the decay rate of iodine 131? This is the formula my teacher said to use.... more
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12/17/14

Jack had $54 to spend. He bought 3 DVD's for $36. Jack still wants to grab some lunch. Write an inequality that represents what Jack can spend on lunch.
We have to type out our answers since i go to a online school. I need this ASAP please.....
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12/17/14

The longer leg of a right triangle is 1cm longer than the shorter leg.
The longer leg of a right triangle is 1cm longer than the shorter leg. The hypotenuse is 9cm longer than the shorter leg. Find the side lengths of the triangle.   shortest leg= longest... more
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12/16/14

I just need to know how to solve this word problem.
A hot pretzel stand in the mall sells regular pretzels for $1.50 each and jumbo pretzels for $2.25 each. On Saturday, they sold 36 more jumbo pretzels than regular pretzels. The total sales for... more
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12/16/14

What quadratic equation has the roots 6 ± 3i?
What quadratic equation has the roots 6 ± 3i?   A.x2 + 45 = 0B.x2 + 81 = 0 C.x2 – 12x + 45 = 0D.x2 – 12x + 811 = 0    
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12/16/14

the quotient of a number and -4, plus 9, is 13. what is the quotient of the number?
I really need help with this. I am doing my exam review and got to have this information and may you explain the answer to me, please :)
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12/16/14

The length of a rectangle is twice its width. If the perimeter of the rectangle is 42 yards, find the area
The length of a rectangle is twice its width. If the perimeter of the rectangle is 42 yards, find the area
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12/16/14

Question is in description
Suppose x = 9 is a solution to the equation f(x) = g(x). If a table of values for the equation y = f(x) contains an x–value of 9 and a corresponding y–value of 18, then which of these statements is... more
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12/16/14

how do you find the height of a right triangle given two elevation angles?
this is the question i am having trouble with:   At a certain distance the angle of elevation to the top of a building is 60 deg.  From 40 feet further back, the angle of elevation is 45 deg.... more
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12/15/14

Determine the number of miles and cost
John needs to rent a 24 foot truck for one day to help his family move to a new house. Budget charges $50 plus 79 cents per mile. Ryder charges $40 plus 99 cents per mile. Determine the number of... more
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12/15/14

How Many Gallons?
How many gallons of 15% hydrogen peroxide solution must be mixed with 10 gallons of 4% hydrogen peroxide solution to get a 10% hydrogen peroxide solution?
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