09/25/15

they want both amounts for each solution
A large solar heating panel requires 240 gallons of a fluid that is 55% antifreeze. The fluid comes in either a 65% solution or a 25% solution. How many gallons of each should be used to prepare... more
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09/25/15

statistics word problem help
One of Umbrella Corporation's manufacturing plants makes two independent products, X and Y. The cost to make X is $ 0.7 per unit and the cost to make Y is $ 0.1 per unit. There is a monthly fixed... more
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09/25/15

statistics word problem help
Cholesterol levels in the American adult population have approximately a bell shaped distribution with a mean 170 and standard deviation 6.9. A "healthy" level is one that falls within the range of... more
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09/25/15

mindy picked4 times as many daisies as tulips for a flower bouquet. She picked a total of 20 flowers. How many more daisies than tulips did she pick?
4th grade math question
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09/25/15

Find the derivative of the function f(x) = x+ sqrt(X) using the definition of derivative
Please help me finding the derivative of f(x) using the definition of derivative 
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09/24/15

I'm having a great deal of Difficulty with this problem
Assume that a procedure yields a binomial distribution with n trials and the probability of success for one trial is p. Use the given values of n and p to find the mean μ and standard deviation... more
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09/24/15

Proofs: Given: =PQ = RS =QS = ST Prove: PS=RT
So I know the first lines are PQ= RS and QS = St and I think I don't segment addition which for this would be PQ + QS = PS and TS + SR = TR for the next couple lines but i'm not sure after that...
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09/24/15

how many milliters of a 0.310 molar HCl solution are needed to react completly with 2.70 grams of zinc to form zinc chloride
 here are the answer choices 480.    580.      370.    270.     190.
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09/24/15

A book publisher prices its products to provide a 49% MARGIN. What RATE OF MARKUP do they use?
Round to 2 decimal places. I do not know how to  solve
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09/24/15

To run 10000 meters in a world class time of 27 minutes and 30 seconds, approximately what time should a competitor expect to hear at the 1600 meter mark
27 min 30sec= 1650 sec  
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09/24/15

Equation of a circle word problem help?
A rock is dropped into a pond, creating a circular ripple. The radius of the ripple increases steadily at 6 centimeters/sec. A toy boat is floating on the pond, 2.00 meters east and 1.00 meters... more
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09/24/15

Evan has $2.55 more than Richard. Jonas has four time as Evan. the three boys have $24.15 altogether how much money does jonas have?
Evan has $2.55 more than Richard.  Jonas has four times as much money at Evan.  The three boys have $24.15 altogether.  How much money does Jonas have
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09/24/15

Amy ran 1 lap in 3 minutes. If a track is 2/8 km long, how many minutes does it take amy to run 1km?
I need to show work too
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09/24/15

Use linear regression to find the equasion of the line that best fits the data.
Age(years)        Retail Price 1                        498 2                        400 3                        336 4                        253 5                        155 Predict the... more
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09/24/15

How many lessons can you take, and how much money will you have left over?
You want to take lessons. The cost of the introductory lesson if 5/8 the cost of each additional lesson which are $80. You have a budget of $375. How many lessons can you take, and how much money... more
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09/24/15

Help! I need confirmation.
An empty basement with a level floor was flooded to a depth of 18 inches. When a pump was turned on, the water level decreased 1 1/2 inches during the first 50 minutes. At this rate, how many hours... more
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09/24/15

What is the average speed?
Mr. Kent drove to a conference. The first half (in terms of distance) of the trip took 3 hours due to traffic. Traffic let up for the second half of the trip and he was able to increase his average... more
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09/24/15

How much profit will the professor receive from the book?
A professor signed a contract with a publishing company for the publication of a college textbook. The contract states that the professor will receive $5000 when the manuscript is complete and... more
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09/23/15

Two Variable equations/ word problem
As the number of pages in a photo book increases, the price of the book also increases. There is an additional shipping charge of 15%. The price of a book can be modeled by the equation below,... more
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09/23/15

The molecular formula of aspartame, the artificial sweetener marketed as NutraSweet®, is C14H18N2O5.
What is the molar mass of aspartame?Express your answer using four significant figures. How many moles of aspartame are present in 1.00 mg of aspartame?Express your answer using three significant... more
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09/23/15

What is the mass?
What is the mass, in grams, of 1.50 mol of iron (III) sulfate?Express your answer using three significant figures What is the mass, in grams, of 1.30×1021 molecules of aspirin, C9H8O4?Express your... more
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09/23/15

What is the acceleration of the sled, assuming it is constant?
A rocket-driven sled running on a straight,level track has been used to study the physiologicaleffects of large accelerations on astronauts.One such sled can attain a speed of361 m/s in 1.8 s... more
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09/23/15

A committee of four people is to be formed from 6 lawyers and 8 teachers.
A committee of four people is to be formed from 6 lawyers and 8 teachers. Find the probability that two are teachers and two are lawyers. Round to the nearest tenth of a percent.A. 42.0%B. 4.3%C.... more
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09/23/15

1. A committee of four people is to be formed from 6 lawyers and 8 teachers.
1. A committee of four people is to be formed from 6 lawyers and 8 teachers. Find the probability that all of them are teachers. Round to the nearest tenth of a percent.A. 36.0%B. 89.0%C. 1.1%D. 7.0%
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09/23/15

3. Fry Brothers heating and Air Conditioning, Inc. employs Larry Clark and George Murnen to make service calls to repair furnaces and air conditioning units in
3. Fry Brothers heating and Air Conditioning, Inc. employs Larry Clark and George Murnen to make service calls to repair furnaces and air conditioning units in homes. Tom Fry, the owner, would like... more
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