melvin
Most popular questions and responses by melvin
Statistics
The amount of time the university professors devote to their jobs per week is normally dis tributed with a mean of 52 hours and a standard deviation of 8 hours. (a) What is the probability that a professor works for more than 56 hours per week? (b) Find
asked on March 20, 2017 
math
A ladder 9.00 m long leans against the side of a building. If the ladder is inclined at an angle of 75.0° to the horizontal, what is the horizontal distance from the bottom of the ladder to the building?
asked on July 19, 2009 
organic.chem
Compound X, C8H17Cl, is a chiral product of the radical chlorination of 4methylheptane. X reacts in SN2 fashion with NaI in acetone to form Z, C8H17I. When the reactant is the Renantiomer of X, only the Renantiomer of Z is formed. What is the structural
asked on June 22, 2009 
Physical Science
A model electric train requires 12 V to operate. When connected to a household voltage of 120 V, a transformer is needed. If the primary coil has 500 turns, how many turns must the secondary coil have?
asked on April 4, 2015 
math
the angle of elevation of the top of a radio mast from a point 53m from its base on level ground is 61degre. Find the height of the mast to the nearest 5m.
asked on June 12, 2016 
Algebra
A 12  ft ladder leans against the side of a house. The bottom of the ladder is 6 ft from the side of the house. How high is the top of the ladder from the ground? If necessary, round your answer to the nearest tenth.
asked on June 2, 2019 
Algebra
The formula T=2π√L/480 can be used to find the period (T in seconds, the time it takes a pendulum to complete one cycle) of a pendulum that is L cm long. (a)Rewrite this formula using rational exponents. Don't forget to rationalize the denominator.
asked on June 11, 2011 
math
How much water must be added to 60 liters of 60 percent alcohol mixture to reduce it to a mixture of 50 percent alcohol concentration? What if 30 percent alcohol mixture is added instead of water?
asked on December 3, 2017 
Math
The vector a1=(1,1,0) and a2=(1,1,1) span plane in R^3. Find the projection matrix P onto the plane, and find nonzero vector b that is projected to zero.
asked on January 2, 2011 
science
An incident Ray makes 60 degrees angle with the surface of the plane mirror, what is the angle of refraction. Options are...a 60 b 90 c 30 d 0....this is a question in a guide is it correct
asked on February 28, 2016 
AP Physics
Light passes from air into water at an angle of incidence of 33.5.degrees Find the angle of refraction in the water. Answer in units of degrees
asked on September 25, 2011 
math
The ratio of boys to girls on the bus is 20/15
asked on November 24, 2014 
algebra
a bug crawls clockwise around the outside rim of a clock from 12 to 4 and travels 7 inches. if a second bug crawls around the outside rim from 6 to 11, in the same direction, how many inches did the bug crawl?
asked on February 17, 2015 
analytic
what is the answer of this?the line segment connecting (x,6)and (9,y) is bisected by the point (7,3) find the values of x and y
asked on November 26, 2013 
Statictics
What is the probability of tossing a number divisible by two, and the probability of tossing a prime number of a "Fair Die"?
asked on May 17, 2011 
Math
2y/3+27+3y/4=24 Please help me solve and show your work please and thank you
asked on February 15, 2012 
algebra
A perfume maker wishes to blend perfume valued at $ 410 an ounce with perfume worth $ 250 an ounce to obtain a mixture of 40 ounce worth $ 300 an ounce. How much of the $ 410 perfume should he use?
asked on December 3, 2017 
math
List the ages of two people in your life, one older than you and one younger than you. It would be best if the younger person was 15 years of age or younger. Find the prime factorizations of your age and the other two persons’ ages. Show your work listed
asked on January 25, 2011 
algebra
How do you solve 1/125=25^6x5 please and thank you I read this as 1/125 = 256x5 or 53=256x5 Take the log base five of each side.. 3=2(6x5) solve for x. What exactly do you mean by take the log base five of each side?
asked on April 22, 2007 
algebra
admission tickets to an advanced movie screening were priced at P 200 for adult and P 150 for students. If 450 tickets were sold and the total receipts were P 14, 400. How many of each type of tickets were sold?
asked on December 4, 2017 
logic
Convert the following formula to conjunctive normal form (clause form). a) a ≡ (b ≡ c) is the answer (a כ(( b כ c) ^ (c כ b))) ^ ((( b כ c) ^ (c כ b)) כ a) unsure thanks
asked on January 18, 2016 
Principles of finance
Faulkner’s Fine Fries Inc (FFF) is thinking about reducing its debt burden. Given the following capital structure information and an expected EBIT of $50 Million (plus or minus 10%) next year, should FFF change their capital structure? FAULKNER'S FINE
asked on June 8, 2013 
Statistics
This is my first stats class and I don't know how to do this, could you please help me? Thank you. You are asked to determine the typical number of sales of a certain product at the store you work for. A sample of 50 days over the last quarter shows an
asked on October 31, 2011 
math
Adding mixed numbers so its the same denominator: 3 5/8 + 12 1/6
asked on September 14, 2011 
Math
I am 55, my motherlaw is 70, my friend is 40. How do I figure out the LCM and the GCF. My home assignment is listed as= List the ages of two people in your life, one older than you and one younger than you. It would be best if the younger person was 15
asked on January 25, 2011 
Math
Admission tickets to an advanced movie screening were priced at $ 200 for adults and $ 150 for students. If 450 tickets were sold and the total receipts were $ 14, 400. How many of each type of tickets were sold?
asked on December 4, 2017 
algebra
A can do certain task in 8 hours, B in 10 hours and C in 12 hours. How long will it take to do the task if A and B work 1 hour and then A and C finish the task?
asked on December 4, 2017 
algebra
How much water must be added to 60 liters of 60 percent alcohol mixture to reduce it to a mixture of 50 percent alcohol concentration? What if 30 percent alcohol mixture is added instead of water?
asked on December 3, 2017 
health
An example of a depression screening tool includes the ? A. Patient health Questionnaire B. Center for Epidemiologic Studies Depression scale C. Geriatric Depression Scale D. All od the above
asked on March 12, 2014 
Math
if a 6 foot man casts an 8 foot shadow what is the height of the building that casts a 72 foot shadow
asked on January 16, 2014 
statistics
The general manager for Gordon's Self Service Gasoline is interested in estimating the mean number of gallons of gasoline that are purchased by customers at their Philadelphia location. He would like his estimate to be within plus or minus 0.50 gallons,
asked on April 18, 2012 
math
help! If you have an equilateral triangle with a line down the middle from top to bottom with T at the top and R X S at the bottom, X being in the middle and RT=6, RS=9 then RX= what?
asked on January 7, 2012 
Public Finance
A worker lives in a state that has its own income tax. The worker is in the 31 percent federal tax bracket. In addition, he is subject to a 9 percent MTR for his state income tax. Assume that mortgage interest is deductible both on his federal and state
asked on January 24, 2011 
english
Hi. I know this might be kind of a stupid question, but I was wondering if a predecessor follows something or is before it? I thought it was after, but the dictionary definition makes it seem like it is before. Is it before because of the pre? Thank you
asked on April 22, 2007 
algebra
Pablo and Linda both travelled from Tuguegarao to Manila for a convention. Pablo drove his car at an average speed of 50 km per hour, while Linda took a plane. Her trip required 1 hour, and his 9 hours. What was the average speed of Linda's plane?
asked on December 4, 2017 
math
a group of 3 friends shared the cost of a tape recorder. if andy, barbara, and donna each paid $12, $30 and $18, respectively, then donna paid what percent of the cost of the tape recorder?
asked on March 9, 2015 
Science
A car of mass m travelling at 20 m/s east on a straight level road and a truck of mass 2m travelling at 20 m/s west on the same road. What is the velocity of the car relative to the truck?
asked on February 7, 2013 
math
employees worked 200 regular hours and 50 hours of overtime. what percent of the total hours for the week were overtime?
asked on July 12, 2011 
Math
show that the length of Ax equals the length of A^T x if AA^T=A^T A
asked on December 8, 2010 
PHYSICS
A steam turbine operates between hot and cold reservoir temperatures of 538.0 ¢XC and 92.1 ¢XC, respectively. If heat is supplied at a rate of 238.0 MW, what maximum amount of power could the turbine deliver?
asked on March 27, 2010 
history
Without our two great political parties cutting across economic and geographic interests.Democracy as we know it could never have been made to function. The author of this statement probably meant to suggest that
asked on March 7, 2008 
algebra
A man can do a certain task in 21 hours, another man can do the task in 28 hours and a boy can do the task in 48 hours. Find how long it will take to do the task if all three work.
asked on December 4, 2017 
algebra
jake and jessie are standing next to each other in the sun. if jake's shadow is 48 inches long, and he is 72 inches tall, how long is jessie's shadow, in inches, if she is 66 inches tall?
asked on February 17, 2015 
algebra
An equivalent expression of h+zx
asked on October 6, 2010 
prepositional calculus
Convert the following formula to conjunctive normal form (clause form). a) a ≡ (b ≡ c) is the answer (a כ(( b כ c) ^ (c כ b))) ^ ((( b כ c) ^ (c כ b)) כ a) unsure thanks
asked on January 18, 2016 
writing
Compare and contrast your abilities as an academic writer now as opposed to when you began your studies at the University of Phoenix. Using four comparatives and four superlatives within your responses, explain what has led to these changes and what
asked on February 8, 2011 
science
Whose responsibility is it to reduce our impacts on climate?
asked on January 1, 2011 
history
What do the Stars on the U.S. Flag mean.
asked on March 7, 2008

Taylor
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posted on September 24, 2019 
Taylor
98fw8f90t9t9t9t9y969fhfcuud
posted on September 24, 2019 
algebra
noted
posted on December 4, 2017 
Math
Man 1/21 other man 1/28 boy 1/48 Man’s rate other man’s rate boy’s rate 1/21 1/28 1/48 Let x be the number of hours it will take all three to do the task. Combined rate = 1/x 1/21 + 1/28 + 1/48 = LCD = 28, 224 1344 / 28, 224 + 1008 / 28, 224 + 588 /
posted on December 4, 2017 
Math
Miscellaneous Problem 4.) The three angles of a triangle are x , ( x+30), (x6) The sum of the angle of a triangle is 180. x + (x + 30) + (x6) = 180 x + x + 30 + x – 6 = 180 3x + 30 – 6 = 180 3x + 24 = 180 3x = 180 – 24 3x = 156 x = 52 degree (x +
posted on December 4, 2017 
math
45km : 30liters = ?km : 45liters (45)(45) = 2025 2025/30 = 67.5km
posted on December 3, 2017 
BOB
30
posted on April 6, 2017 
Government
Amy is right guys i took OCA's answers and got an 80... Listen to amy... wel 5 is actually A for me but i think the schools are doing that on purpose for this exact reason Haha
posted on February 1, 2017 
prepositional calculus
my problem has nothing to do with assigning truth values though I have to rewrite it in conductive normal form
posted on January 19, 2016 
prepositional calculus
you did not misunderstand the ≡ operator
posted on January 19, 2016 
algebra
$27.00
posted on February 17, 2015 
math
what is the ratio from girl to boy and the bus is 20/15
posted on November 25, 2014 
math
how did you get four? I followed you up till 4.9. What did you divide in order to get 4?
posted on November 18, 2014 
Chemistry
no not unless the teacher says your not allowed too
posted on September 25, 2011 
Algebra
Thanks Henry and bobpursley for replying. Now the question makes sense :)
posted on June 11, 2011 
math
I am 55 years old (Melvin) and I am supposed to list the ages of two people in your life which is my mother in law(Saraha) whom is 70 years old is the one older than me and one younger than me is my friend (Peter), he is 40 years old. I am supposed to find
posted on January 25, 2011 
organic.chem
Since you can't draw the structures, could you just give me the name of X and I will draw the structure.Thanks!
posted on June 22, 2009 
social studies
all the countriies we studied in this chapter gained independence from the soviet union
posted on November 10, 2008