Most popular questions and responses by alberto
  1. math

    a fire fighter's 36 foot ladder leans against a building. the top of the ladder touches the buliding 28 ft above the ground. what is the measure of the angle of the ladder forms with the ground?

    asked on May 3, 2011
  2. English

    In my brother's keeper by Jay ... What is the conflict?

    asked on May 7, 2016
  3. math

    Jill is 20 kilometers away from Joe. Both begin to walk toward each other at the same time. Jill walks at 1.5 kilometers per hour. They meet in 5 hours. How fast is Joe walking?

    asked on May 3, 2012
  4. Math

    Rina saves $4.50 each week. Her sister save $2 more each week. When her sister has saved $14 more than Rina, how much has Rina saved?

    asked on August 27, 2014
  5. Biochemistry

    You are asked to make 50 mM Tris-HCl pH 7.5. The pK of Tris is 8.1. What is the concentration of the components (Tris and Tris-H+) in the final buffer solution?

    asked on July 3, 2017
  6. math

    Sandy is 5.3 feet tall. How many centimeters tall is she? Round your answer to the nearest tenth.

    asked on June 26, 2012
  7. Algebra

    A rectangular piece of cardboard is 15 inches longer than it is wide. If 5 inches are cut from each corner, and the remaining fold up to form a box,the volume of the box is 1250 cubic inches. Find the dimensions of the piece of cardboard.

    asked on May 12, 2014
  8. Biochemistry

    You are asked to prepare 2 L of 50 mM sodium phosphate pH 7.0. The pK2 of phosphate is 6.8. What are the amounts of sodium phosphate mono basic monohydrate (NaH2PO4 • 1H2O, MW=137.99 Da) and anhydrous sodium phosphate dibasic (Na2HPO4, MW=141.96 Da) that

    asked on July 3, 2017
  9. math

    a gear on a bicycle has the shape of a circle one gear has a diameter of 4 inches and a small one has a diameter of 2 inches Justin says that the circumferences of the larger gear is 2 inches more than the circumferences of the smaller gear do you agree

    asked on January 22, 2015
  10. en forma estandar

    como se escribe 423,090,709,000 en forma estandar

    asked on September 14, 2010
  11. programming techniques

    how do modular program work, can you show me an example of it using dowhile pseudo code.

    asked on July 11, 2008
  12. math (story problems)

    Andy took a reading test. He read 97 words per minute. If a book has an average of 250 words on a page, how many pages can Andy read in one hour?

    asked on June 26, 2012
  13. chemistry

    Calculate the volume of HNO3 that must be introduced in the calorimeter,knowing that it were used 60 ml NaOH, Cc=100cal/grd and delta H=-13,5 kcal/mol.. please help me,i have no clue for this..

    asked on November 7, 2016
  14. Physics

    An astronaut has crash landed on a planet that little is known about (not even the acceleration due to gravity). She must descend a steeo cliff to find shelter, but wants to know how high the cliff is before making the attempts. She happens to have

    asked on October 3, 2011
  15. science

    What is the effect of the type of alcohol (methanol, ethanol and pentanol) on the evaporation time?

    asked on September 12, 2011
  16. Math

    I am less than 100, the sum of my digits is 8. If you divide me by 2, I am an even number. My tens digit and my ones digit are the same. What is the answer

    asked on November 15, 2010


    asked on May 5, 2009
  18. Biochemistry

    How do you calculate the pI of a protein?

    asked on September 1, 2017
  19. Biochemistry

    Why is it important to know the pI of a protein that you are working with?

    asked on September 1, 2017
  20. economics

    main characteristics of the market system

    asked on September 9, 2012
  21. chemistry

    Hypothesis on "behavior of solids on warming".

    asked on September 12, 2011
  22. math

    cx+7 if x2 determine any values of c which make f continuous for all real numbers (c=6) determine any values of c which make f differentiable for all real numbers ???

    asked on January 24, 2011
  23. writing

    if this is a subject verb agreement Did you know a famous animal rights activist has criticized horseracing because of the danger involved? and why

    asked on March 26, 2009
  24. pseudocode programming

    need help to write a sumsquare function module and then rewrite that !@#$%^&tion module into an algorithm from this pseudocode. count integer square integer sumsquare integer count = 0 square = 1 do while count

    asked on August 9, 2008
  25. algorithm

    can someone tell me if this is correct. Write an algorithm that will display the sum for a given number of squares. In other words if the user enters the value 5, then the output should be 1^2 + 2^2 + 3^2 +4^2 + 5^2 = 55. sumsquare integer square integer

    asked on July 17, 2008
  26. progra

    how would i be able to write a function module for average from this pseudo-code and then use it to write an algorithm. Sum integer Num integer Count integer Count:= 0 Sum:=0 Dowhile count

    asked on July 14, 2008
  1. fractions

    Respect the vets!

    posted on March 7, 2019
  2. chemistry

    Highest = NaF Medium = CH3I Lowest = CH4

    posted on April 24, 2013
  3. math

    161.5 centimeters tall (thank you)

    posted on June 27, 2012
  4. math (story problems)

    23.28 pages per hour

    posted on June 27, 2012
  5. physics

    there is absolutely no way its that complicated. and at points it looks like you made up some values. be more clear.

    posted on January 28, 2011