Questions Asked on
August 1, 2013

PM
You are creating a customer database for Modesto Nuts minor league baseball team. Draw a project network given the information below. Complete the forward and backward pass, compute activity slack, and identify the critical path. How long will this project
asked by kim 
math
how many ways can you make 45 cents with pennies, dimes, nickels,and quarters????? help me as fast as you can this is worth 1/2 my grade
asked by kimmy in need it answer now 
physics
A physicist at a fireworks display times the lag between seeing an explosion and hearing its sound, and finds it to be 0.800 s. (a) How far (m)away is the explosion if air temperature is 22.0°C, neglecting the time taken for light to reach the physicist?
asked by Justin 
Chemistry
For a certain reaction, ΔH° = –76.8 kJ and ΔS° = –225 J/K. If n = 3, calculate E° for the reaction at 25°C.
asked by Tayla 
Chemistry
A compound with a percent composition by mass of 87.5% N and 12.5% H was recently discovered. What is the number of moles of Hydrogen in this compound? Atomic Mass: N = 14.01, H = 1.008
asked by Anonymous 
chemistry
Nitric acid is produced commercially by the Ostwald process, represented by the following equations. 4 NH3(g) + 5 O2(g) 4 NO(g) + 6 H2O(g) 2 NO(g) + O2(g) 2 NO2(g) 3 NO2(g) + H2O(l) 2 HNO3(aq) + NO(g) What mass in kg of NH3 must be used to produce 4.4
asked by Kris 
Analytical chemistry
A dilute perchloric acid solution was standardized by dissolving 0.2445 g of primary standard sodium carbonate in 50 mL of the acid, boiling to eliminate CO2, and backtitrating with 4.13mL of dilute NaOH. In a separate titration a 25mL portion of the acid
asked by Gloria 
Physics
A swimmer heads directly across a river, swimming at 1.9 m/s relative to the water. She arrives at a point 50 m downstream from the point directly across the river, which is 79 m wide. (a) What is the speed of the river current? m/s (b) What is the
asked by Jacob 
physics
An 8 hour exposure to a sound level of 95.0 dB may cause hearing damage. What energy in joules falls on a 0.850 cm diameter eardrum so exposed?
asked by Justin 
AP CHEMISTRY
Commercial brass, an alloy of Zn and Cu, reacts with hydrochloric acid as follows. Zn(s) + 2 HCl(aq) ZnCl2(aq) + H2(g) (Cu does not react with HCl.) When 0.5093 g of a certain brass alloy is reacted with excess HCl, 0.0953 g ZnCl2 is eventually isolated.
asked by Kris 
biology
In a laboratory population of diploid, sexually reproducing organisms a certain trait is determined by a single autosomal gene and is expressed as two phenotypes. A new population was created by crossing 102 pure–breeding (homozygous) dominant
asked by penny 
physics
19 cars in a circle at a boom box competition produce a 130 dB sound level at the center of the circle. What is the average sound level(dB) produced there by each, assuming interference effects can be neglected?
asked by Justin 
math word problem
sam needs to clean the window on his house. he has a 25foot ladder and places the base of the ladder 10 feet from the wall of the house. A) how high up the wall will the ladder reach? B) if his windows are 20 feet above the ground, what is the farthest
asked by Nick 
statistical analysis
2. The Computer Systems Department has eight faculty, six of whom are tenured. Dr. Vonder, the chair, wants to establish a committee of three department faculty members to review the curriculum. If she selects the committee at random: a. What is the
asked by Anna 
Math
A ground observer sights a weather balloon to the east at an angle of elevation of 15º. A second observer 3 miles to the east of the first also sights the balloon to the east at an angle of elevation of 24º. How high is the balloon?
asked by William320 
physics
(a) By what factor is one sound more intense than another if the sound has a level 17.0 dB higher than the other? (b) If one sound has a level 32.0 dB less than another, what is the ratio of their intensities?
asked by Justin 
physics
The amplitude of a sound wave is measured in terms of its maximum gauge pressure. By what factor does the amplitude of a sound wave increase if the sound level goes up by 38.0 dB?
asked by Justin 
biology
In a population with two alleles, B and b, and the allele frequency of b is 0.4. Calculate the allele frequency of heterozygotes if the population is in Hardy–Weinberg equilibrium? Show your work. Thanks for any help in advance!
asked by Rosie 
Life orientation
What are causes of social issue.what are five factors of social issue.the impact of the contemporary of social issue. How the contemporary social issue impact negative on local and global communities list five.give a detail description of your plan and
asked by Emely 
Math
The chief financial officer of a home health agency needs to determine the present value of a $10,000 investment received at the end of year 10. What is the present value if the discount rate is: a. 6 percent? b. 9 percent? c. 12 percent? d. 15 percent?
asked by April 
statistical analysis
According to the “January theory,” if the stock market is up for the month of January, it will be up for the year. If it is down in January, it will be down for the year. According to an article in the Wall Street Journal, this theory held for 29 out
asked by Anna 
physics
An iorn rod (a=11.8 x 10^6 C^1) has a length of 1000 meters(or 1 km) at 0 degrees Celsius. If the rod must expand 10 cm to bridge a gap, to what temperature must the rod be heated?
asked by Jason 
home, school, and community
which one of the following statements is NOT true when a partnership is created between a parent and a teacher a. parents are cpable of making major contributions to rheir childs education b.teachers share responsibility and pwer c. teachers inform
asked by debra 
statistical analysis
New Process, Inc., a large mailorder supplier of women’s fashions, advertises sameday service on every order. Recently, the movement of orders has not gone as planned, and there were a large number of complaints. Bud Owens, director of customer
asked by Anna 
chemistry
You have a chemical sealed in a glass container filled with air. The glass container has a mass of 200.0 grams and the chemical has a mass of 800 grams. The total mass of the setup is 1000 grams. The chemical is ignited by means of a magnifying glass
asked by Kris 
CHEMISTRY
Bacterial digestion is an economical method of sewage treatment. 5CO2(g) + 55NH4+(aq) + 76O2(g) right arrow Bacteria C5H7O2N(s) + 54NO2(aq) + 52H2O(l) + 109H+(aq) bacterial tissue The above reaction is an intermediate step in the conversion of the
asked by Kris 
Life orientation
Two example of social issue. Identify a social issue in your local community and describe it shortly .
asked by Emely 
ap chemistry
Consider the following unbalanced reaction. P4(s) + F2(g) PF3(g) How many grams of F2 are needed to produce 212 g of PF3 if the reaction has a 79.8% yield? I did 212/.798=265.66 grams do I convert that to moles next?
asked by Kris 
statistics
Suppose a largescale randomized experiment were conducted to compare two weight loss plans. At the end of the experiment, the weight loss for each subject (in pounds) was recorded. The pvalue turned out to be .004, and a 99% confidence interval for the
asked by Alexander 
Writing
Please point out mistakes,give feedback, and grade. ACT prompt: In recent years, many schools have adopted a "Great Books" based curriculum. These schools require students to study certain designated classic books of Western civilizations, arguing that
asked by Anonymous 
ap chemistry
BaO2(s) + 2 HCl(aq) H2O2(aq) + BaCl2(aq) What amount of hydrogen peroxide should result when 1.00 g of barium peroxide is treated with 15 mL of hydrochloric acid solution containing 0.0330 g of HCl per mL? So confused... >.
asked by Kris 
physics
You are riding in a boat whose speed relative to the water is 6.9 m/s. The boat points at an angle of 25.0° upstream on a river flowing at 15.1 m/s. Find the time it takes for the boat to reach the opposite shore if the river is 26.5 m wide.
asked by LouLou 
biology multiple choice
I am preparing my self for a biology exam and i am going through past papers. Unfortunately they do not supply us with the answers, which in one way is good.(since you have to actually work for your answers) All I am asking of you people is that you run
asked by alex 
Child Care
Increasing numbers of communities are addressing the need for outofschool care due to the relationship between A. teen pregnancy and inadequate care of infants. B. inadequate supervision of teens and teen pregnancy. C. working mothers and juvenile
asked by Brenna 
Balthazar
A 30 ml sample of of 0.150 m hydrazoic acid (ka = 4.50x10^4 ) is titrated with a 0.100 m NaOH what is the ph after the ff additions of NaOH 30ml 45ml 60ml
asked by Omi 
Algebra 1
A bird sitting 16 feet above the ground in an apple tree dislodges an apple. After how many seconds does the apple land on the ground? (Assume no branches interfere with it's fall.) Use vertical motion model to solve this problem.
asked by Need now 
chemistry
Consider the following unbalanced reaction. P4(s) + F2(g) PF3(g) How many grams of F2 are needed to produce 212 g of PF3 if the reaction has a 79.8% yield?
asked by Kris 
math
The directions on a box of muffin mix calls for 12/3 cup muffin mix and 1/2 cups water. If there is only 1 cup of muffin mix left in the box, how much water should be used?
asked by terrie 
physics
a 2500kg car is rounding a circular turn of radius 200m at constant speed. the magnitude of its acceleration is 2m/s2.what is the speed of the car? how much is the centripetal force?how much is the centrifugal acceleration?
asked by nuche Nina cajes 
Math
The chief financial officer of a home health agency needs to determine the present value of a $10,000 investment received at the end of year 10. What is the present value if the discount rate is: a. 6 percent? b. 9 percent? c. 12 percent? d. 15 percent?
asked by April 
Analytical chemistry
A Kjeldahl analysis was preformed upon a 0.055 g sample of impure biguanide (C2H7N5, fw=101.1). The liberated ammonia, collected in 40 mL of 4% boric acid was titrated with 19.51 mL of 0.1060 M HCl. Calculate the percentage of biguanide in the sample.
asked by Gloria 
math
There were 100 pairs of socks 30% of them were sold on Monday and 40% of the remainder were sold on Tuesday. How many pairs of socks were left?
asked by vincent 
pre algebra
how many ways can you make 45 cents with pennies ,dimes, nickels, and quarters?
asked by kimmy 
geography
the sphere of influence of an organization that renders a service in your area.
asked by masingita 
Stats
There are two boxes, each with several million tickets marked “1” or “0”. The two boxes have the same number of tickets, but in one of the boxes, 49% of the tickets are marked “1” and in the other box 50.5% of the tickets are marked “1”.
asked by Marian 
cultural diversity
an early learning center that emphasizes "product" over "process" would. a.threaten most mainstream children. b. be child directed, reflecting self selection of activities and materials. c. ignore the principles of developmentally appropriate practices.
asked by debra 
statistical analysis
Compute the mean and variance of the following discrete probability distribution. x P(x) 2 .50 8 .30 10 .20 Please assist and guide accordingly. Thank you so very much!
asked by Anna 
physics
a 2500kg car is rounding a circular turn of radius 200m at constant speed. the magnitude of its acceleration is 2m/s2.what is the speed of the car? how much is the centripetal force?how much is the centrifugal acceleration?
asked by nuche Nina cajes 
solid mechanics
A piece of material 15 cm long by 2.5 cm square is in compression under a load 100 kN.If the modulus of elasticity of the material is 105 GPa and Poisson's ratio is 0.25, find the alterntion in length if all lateral strain is prevented by the application
asked by ripon 
math
kenny can assemble a desk in 40 minutes while his friend paul can assemble the same desk in 20 minutes. kenny worked for 10 minutes and decided to ask paul to work together with him to finish the job earlier, so that they can go to see a football game. how
asked by Algebra 
biology
In a population that is in Hardy–Weinberg equilibrium for two alleles, C and c, 16% of the population shows a recessive trait. Assuming C is dominant to c, state the percent of the population shows the dominant trait? Show your work. Thank you!
asked by Jen 
bus 123
Carol Miller went to Europe and forgot to pay her $850 mortgage payment on her New Hampshire ski house. For her 55 days overdue on her payment, the bank charged her a penalty of $26. (assume 360 days). What was the rate of interest charged by the bank?
asked by jeff 
chemistry
What mass in kg of NH3 must be used to produce 4.4 multiplied by 106 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?
asked by Kris 
chemistry
What mass in kg of NH3 must be used to produce 4.4 multiplied by 106 kg HNO3 by the Ostwald process, assuming 100% yield in each reaction?
asked by Kris 
math
If 3 "A" cans can hold 4 "B" cans and 3 "B" cans hold 5 "C" cans than how many "A" cans are need to hold 20 "C" cans ?
asked by vincent 
UNDERSTANDING OBSERVATION AND BEHAVIOR
1. Which of the following scenarios would be the best example of a time when observation would be authentic assessment? A. A preschooler in the dramatic play area B. An infant on her first day of child care C. A toddler on a field trip to a local pumpkin
asked by Nai 
math
Find the equation of the line tangent to f(x)=3x^22x1 at the point where x=2
asked by gerald 
algebra
Can someone help me find value of x. please show step by step examples 6/x = 7/x+3
asked by Alaska Diamond 
algebra
I need help figuring this out. If an object 3.9 feet tall casts a shadow 11.7 feet tall. How tall would the shadow be if the object were 17.4 feet tall? please show me step by step for me to understand. thank you so much
asked by Alaska Diamond 
algebra
Can someone show me step by step examples of simplifying 3√5/64 thank you
asked by Alaska Diamond 
algebra
I need help!!! I need to simplify √6 (9√6) + 7√6
asked by Alaska Diamond 
algebra
Radicals are so confusing. Can someone show me step by step please. Im lost 5/8+√7
asked by Alaska Diamond 
Algebra
can someone help with this 8x/16x^2=5/x4 solve
asked by Cathy 
math
User: Ariana Bouillon In Course: M/J Mathematics 2 V9 ( 2820) Instructor: Mrs. Susan Lafferty 08.03 Experimental Probability Warning: There is a checkbox at the bottom of the exam form that you MUST check prior to submitting this exam. Failure to do so may
asked by luis 
math
come on answer my question
asked by kimmy in need it answer now 
algebraic
40y1 ,y=5
asked by choi 
statistics
After one month of operation the health information services at community health center determined that there were two reords misfiled out of the 450 active records. What is the filing accuracy rate for this area?
asked by Johnnie 
math
In the United States, personal income taxes are paid according to a specific scale. For example, individuals who earn a yearly salary between $31,000 and $31,150 must pay $4229 in taxes. Individuals who earn a yearly salary between $41,000 and $41,150 must
asked by Adreanna 
STC
Find the correct end behavior diagram for the given polynomial function P(x)=2.75x^4+3x^2+x1
asked by chompi 
statistical analysis
Hi there, I am a senior trying to get some assistance with one of my many papers. Thank you!
asked by Anna 
composition 2
1. Explain why you think it is important to put observations in writing. How can observation enrich our writing? 2. At what point could making and observation halt or obstruct the writing process, and why?
asked by shay 
maths
quadratic equation solve the equation by factorization 27x^2  126x = 0 So x=? or x=?
asked by gean 
Statistics
A statistics student hands each of 300 classmates 2 cookies side by side on a plate. Of the 300 students, 171 choose the cookie that’s on their right hand side, and the remaining 129 choose the cookie that’s on their left. The student says, “That’s
asked by Kit 
maths
Quadratic equation Solve= square root(1y) + square root(12+y) 5 =0
asked by Chiew Poh Joong 
psychology
evolutionary psychology and behavior genetics a. have little in common b. acknoweledge the interactions of heredity and evirronment c. focus on lerning and experience d. are two schools of thought first introduced by john b. watson
asked by meka 
physics
if a skydiver with a surface area of 2m sq falls at a steady speed of 55m/s with a force of 900N what is the pressure on her?
asked by Anonymous 
Maths
What is the smallest possible positive integer x>5 , that leaves a remainder of 5 whenever it is divided by 14 , 8 or 77 ?
asked by KK 
child psychology in general
the main problem with informal theories is they are based on . a.bias b.emotion c. tradition rather than study can someone please help thanks
asked by susue 
children growing up
a famous quotation on child development attributed to the Jesuits most emphasizes the importance of a.early childhood experiences b.adult supervision c.religious indortrination d.role models I know that letter c is wrong so im thinking it a
asked by susue 
children growing up
language development is initially triggered a.socially b.psychologically c.biologically d.by parent contact I know that letter d is the wrong answer .so im thinking the right answer is b I know I have posted these questions before but really need some help
asked by susue 
physics
a 2.00 kg rock is dropped from a bridge to the water 50.0m below. what is the velocity as it hits the water? what is its kinetic energy as it hits the water?
asked by hannah 
Algebra
If y is a positive integer, for how many values of y is 3/2y greater than 1/4 and less than 1/2? F. 0 G.1 H.2 I. 3 J.4 Check this. 1/2>3/2y>1/4 Only 4 and 5 work. Thus, there are 2 values of y.
asked by Anonymous 
Statistics
There are two boxes, each with several million tickets marked “1” or “0”. The two boxes have the same number of tickets, but in one of the boxes, 49% of the tickets are marked “1” and in the other box 50.5% of the tickets are marked “1”.
asked by Stat 
english
where could an apostrophe be put for plural women 1.women's or womens' pl clarify .
asked by R S Telagathoty 
calc
let y be the function of x defined implicitly by the equation x^2 2xy +2y^4=1. find the value of x where y obtains its maximum value.
asked by barbra 
math
how many popsicles are in 2 1/2 dozen
asked by loli 
biology
Explain how new species can originate without geographical barriers.
asked by Annie 
accounting
How do I figure out taxes associated with stock purchased in 2010 for $1000 held for 5 mths. Then sold for $1200 I am in the 28% tax bracket? (I must use the IRS regulations for capital gains in effect in 2010.) I really want to understand how to work this
asked by Tricia