Tuesday
October 21, 2014

Posts by marc


Total # Posts: 106

algebra
on an expressway, the recommended safe distance between cars in feet is given by 0.019v^2+v+14, where v is the speed of the car in miles per hour. Find the safe distance when the following takes place( round answer to three decimal places). v=35 mph ____ft.? and v=55mph ...
September 27, 2014

algebra
The vendor of a coffee cart mixes coffee beans that cost $8 per pound with coffee beans that cost $4 per pound. How many pounds of each sould be used to make a 60-pound blend that sells for $5.25 per pound? $8 coffee __________ $4 coffee __________
September 27, 2014

algebra
on an expressway, the recommended safe distance between cars in feet is given by 0.019v^2+v+14, where v is the speed of the car in miles per hour. Find the safe distance when the following takes place( round answer to three decimal places). v=35 mph ____ft.? and v=55mph _____ft.?
September 27, 2014

geometry
v=1/3TTr^2h;
September 11, 2014

algebra
A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island
September 11, 2014

MATH
v=1/3ttr^2h; h(geometry)
September 11, 2014

MATH
How many liters of water should be evaporated from 110 liters of a 12% saline solution so that the solution that remains is a 20% saline solution
September 11, 2014

math
if a pie is cut into sixths how many pieces would there be ?
September 2, 2014

statistics
The trends in international mathematic and science study (TIMSS) in 2007 examined eighth grade proficiency in math and science. The mean mathematics scale score for the sample of eighth grade students in the US was 508.5 with a standard error of 2.83. Construct a 95% ...
August 2, 2014

Algebra
Solve h=2f/m+1
May 14, 2014

pharmacy tech
to find out if a drug causes nausea you would look in this section of the drug monograph
March 19, 2014

math
Three men, A, B and C agree to share the expense of a fishing expedition in the ratio 2:3:4. A pays $25 for the hire of the boat, B pays $70 for the meal and C pays $49 for traveling expenses. How much must A and C pay B to settle their agreed shares?
March 15, 2014

math
Two numbers are such that their difference, their sum, and their product are in the ratio 1 : 4 : 15. What are the two numbers?
March 15, 2014

geometry
/?gfe_rd=cr&ei=ybIvU7KZAcaE8QfLzYDoDQ
March 6, 2014

PHYSICS
An electron is initially at rest in, but not on the axis of, a solenoid that is carrying a steady current I directed as shown in the cross section below. The electron is initially at rest on the -x axis. The current in the solenoid is suddenly increaed to 2I. In what direction...
December 15, 2013

PHYSICS
its A
December 14, 2013

Physics
0.001 V
December 12, 2013

math
calculate the following, leaving your answer either as a fraction (lowest) or in decimal form Divide: 3/4 ÷ 3 =
September 17, 2013

math
calculate the following, leaving your answer either as a fraction (lowest) or in decimal form Multiply: (2/3) (3/5) =
September 17, 2013

math
calculate the following, leaving your answer either as a fraction (lowest) or in decimal form Subtract: 3/4 - 3/8 =
September 17, 2013

math
calculate the following, leaving your answer either as a fraction (lowest) or in decimal form Add: 3/8 + 1/2 + 3/4+=
September 17, 2013

Mechanics:Statics
Two 10 kg spheres are placed 500mm apart. Express the gravitational attraction acting on one of the spheres as a percentage to its weight on earth.
April 19, 2013

Mechanics:Statics
A man weighs 900N on the surface of the earth. Compare his weight in an airplane flying at an elevation of 9000m. Note that the radius of Earth is 6378km.
April 19, 2013

8th grade science
Good hypothesis for does the human tongue have definite areas for certain tastes
February 3, 2013

science
Does the human tongue have definite areas for certain tastes
February 3, 2013

math
First estimate,then multiply to get the exact answer. 6 2/3 X 3 4/11 X 5
December 18, 2012

Physics
An 80 kg man climbs a 50 m-high hill in 20 minutes. What is the average power in watts he expends climbing the hill?
November 20, 2012

Physics
The weight of a rock on the moon is 0.85 N. If acceleration due to gravity on the moon is 1.7 m/s2, what will be its weight on the earth
November 10, 2012

science
make a graphic organizer to show ways how ways to cause physical changes to a piece of paper
October 2, 2012

math
there are 45 children in a class.if there are 3 more girls than boys,how many are girls?
September 4, 2012

math
i am a three digit number.if you subtract 419 from me the remainder is 126.what number am i?
September 4, 2012

math
there are 45 children in a class.if there are 3 more girls than boys,how many are girls?
September 4, 2012

Statistics
The annual precipitation for one city is normally distributed with a mean of 72 inches and a standard deviation of 3.5 inches. In 95% of the years, the precipitation in this city is between___ and ___
July 23, 2012

chemistry
simply put, (0.75 C/s)(time)(1 mole e-/96485 C)(1 mole Cu/2 mole e-) = (0.10825-0.04175) time = 17,110.07 s = 4.7527 hr
June 18, 2012

chemistry
my answer is 4.7527 hr. it is solved by this format: time = [(0.10825-0.04175)/((0.75)(1/96485)(1/2))]/[3600] time = 4.7527 hr Note: for the dimensional analysis, (mol)/(C/s)(mol/C)=s (divide by 3600 to convert to 1 hr) hope it helps.
June 18, 2012

english
. Your topic is courtesy, and you're writing from the point of view of a caring mentor. Which of the following sentences is most persuasive for an audience of high school graduates from a working-class neighborhood? A. Courtesy to others shows self-respect as much as it ...
May 10, 2012

physics
I meant 3.86*10^-6 N
April 28, 2012

physics
A mass of 710 kg is located at the origin. A second mass, 44.0 kg, is located at the point (0.216,0.702) m. Find the magnitude of the gravitational force on the 44.0 kg mass due to the 710 kg mass at the origin. I got: 3.86×10-6 N Enter the x and y components of the ...
April 28, 2012

physics
Please decide which of the following statements for car collisions are true or false. 1)Crumple zones on cars are parts of the front of the car that are designed to receive maximum deformation during a head-on collision. The essential safety benefit of crumple zones results ...
April 11, 2012

physics
A bullet of mass m = 5.89 g is fired into a block of mass M = 3.09 kg that is initially at rest on the edge of a smooth table. (The table top is 0.83 m above the floor.) The bullet ends up stuck in the block, and together they fly off the table and fall to the floor. If the ...
April 8, 2012

Physics
Wheel A of radius ra = 13.9 cm is coupled by belt B to wheel C of radius rc = 34.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 5.7 rad/s2. At what time will wheel C reach a rotational speed of 168.2 rev/min, assuming the belt does not...
February 10, 2012

Physics?
ok..so for c: v = w*r = 168.2*0.343m =57.6926 and therefore for a: w = v/r = 57.6926/0.139m = 415.055 is that correct? and for the acceleration: for a: a= 5.7*0.139 = 0.7923 and for c: 0.7923/0.343 = 2.3099 but how do I get time ??
February 10, 2012

Physics
Wheel A of radius ra = 13.9 cm is coupled by belt B to wheel C of radius rc = 34.3 cm. Wheel A increases its angular speed from rest at time t = 0 s at a uniform rate of 5.7 rad/s2. At what time will wheel C reach a rotational speed of 168.2 rev/min, assuming the belt does not...
February 10, 2012

math
ok
February 2, 2012

math
i do not get this question 24 / x = 4
February 2, 2012

English 7 - Journal Entry Check
instead of "in" use on for this sentence
February 2, 2012

English 7 - Journal Entry Check
between hard and i for this sentence"I worked really hard. I was" should be a comma also with this sentence"A few weeks later the" a comma should be between later and the
February 2, 2012

physics
A 0.58 kg football is thrown with a velocity of 15 m/s to the right. A stationary receiver catches the ball and brings it to rest in 0.017 s. What is the force exerted on the receiver? Answer in units of N
January 30, 2012

statistics
Among the four northwestern states, Washington has 51% of the total population, Oregon has 30%, Idaho has 11%, and Montana has 8%. A market researcher selects a sample of 1000 subjects, with 450 in Washington, 340 in Oregon, 150 in Idaho, and 60 in Montana. At the 0.05 ...
December 2, 2011

Math
Samantha saved $13 by buying a used DVD. She paid $5 less than half the original price of a new one. How much did Samantha pay for a used DVD?
November 15, 2011

macroeconomics
27. The following data show nominal GDP and the appropriate price index for several years. Compute real GDP for each year and indicate whether you have “inflated” or “deflated” nominal GDP in finding real GDP. All GDP are in billions. Nominal Price level ...
October 11, 2011

macroeconomics
25. The following table shows the price of a specific stereo receiver for a five-year period. Using Year 1 as the base year, calculate the price index for each year. Year Price Price index (answers using Year 1 = 100) 1 $112 ___ 2 144 ___ 3 160 ___ 4 176 ___ 5 200 ___
October 11, 2011

macroeconomics
23. The next four questions refer to the following price and output data over a five-year period for an economy that produces only one good. Assume that year 2 is the base year. Units of Price Year output per unit 1 16 $2 2 20 3 3 30 4 4 36 5 5 40 6 (a) If year 2 is the base ...
October 11, 2011

macroeconomics
22. The following table shows the price of a specific stereo receiver for a five-year period. Using year 3 as the base year, calculate the price index for each year. Year Price Price index 1 $ 88 ___ 2 $100 ___ 3 $120 ___ 4 $132 ___ 5 $140 ___
October 11, 2011

macroeconomics
18. The following is a list of figures for a given year in billions of dollars. Using this data, compute: (a) GDP; (b) NDP; (c) NI; (d) PI; (e) DI; (f) Net exports. Transfer payments $ 16 Government purchases 80 Personal taxes 38 Corporate income taxes 28 Indirect business ...
October 11, 2011

physics
one of the factors that limits the reach of a crane is the moment created by the load, measured with the respect to an axis A at the base of the front support. if the boom shown is 30m long, and at an angle of 25 degrees with the horizontal, determine the moment of the 20000 ...
September 13, 2011

physics
A person is to run a circular track with a radius of 93 meters. The person starts at a certain spot and runs 3 and 1/2 times around the track in a time of 227 seconds. Find the magnitude of average velocity for this trip (|vav|) and find the average speed for this trip. Then ...
September 3, 2011

calculus
At noon, ship A starts sailing due east at the rate of 20km/hr. Ath the time, ship B, which is located 100km east of ship A initially, starts sailing on a course 60 degrees north of west at the rate of 10km/hr. How fast is the distance between the two ships changing one hour ...
March 24, 2011

economics
in vietnam, a paddy of rice is transplanted using 20 workers with wicker backets, in south korea a paddy of rice is transplanted using one worker and a mechanical rice transplanter. using a isoquant-isocost line graph, illustrate why these two different methods are used for ...
February 28, 2011

english
1. The giant monster attacked the warehouse, yesterday morning the warehouse was making sneakers.
February 20, 2011

math
1?
December 16, 2010

calculus
which of the following is an equation of the line tangent to the graph of y = (x^3)-x at the point where x =2: a) y - 6 = 4(x-2) b) y - 6 = 5(x-2) c) y - 6 = 6(x-2) d) y - 6 = 11(x-2) e) y - 6 = 12(x-2) thanks!
December 14, 2010

Calculus
which of the following is an equation of the line tangent to the graph of y = (x^3)-x at the point where x =2: a) y - 6 = 4(x-2) b) y - 6 = 5(x-2) c) y - 6 = 6(x-2) d) y - 6 = 11(x-2) e) y - 6 = 12(x-2) thanks!
December 14, 2010

Calculus
if x^2 + y^3 = (x^3)(y^2) then dy/dx = ? thanks
December 11, 2010

Calculus
a spherical ballon is being inflated at a constant rate of 25 cm^3/sec. At what rate in cm/sec is the radius of the ballon changing when the radius of the ballon is 2 cm? (VOLUME SPHERE FORMULA 4/3 pi r^3)
November 26, 2010

calculus
a rectangle with one side on the x axis and one side on the line x=2 has it upper left vertex on the graph of y=x^2, for what values of x does the area of the rectangle attain its maximum value?
November 26, 2010

Calculus
a college is planning to construct a new parking lot. the parking lot must be rectangular and enclose 6000 square meters of land. A fence will surround the parking lot, and another fence parallel to one of the sides will divide the parking lot into two sections, what are the ...
November 26, 2010

physics
a 27,000kb freight train starting at 12m/s then speeds up to 45 m/s in 35 seconds. what is the acceleration?
November 11, 2010

Spanish
thanks!
August 22, 2010

Spanish
What are subjunctive verbs in Spanish? I've learned them before but I don't understand them.
August 22, 2010

10th grade algebra 2
The Third Root of 3 = 3^1/3 The square root of nine= 3^2 3^1/3 x 3^2= 3^2 1/3
June 4, 2010

statistics
Use the given information to find the P-value. Also, use a 0.05 significance level and state the conclusion about the null hypothesis (reject the null hypothesis or fail to reject the null hypothesis). 1) Vvith H1: p * 0.733, the test statistic is z = 2.09. A) 0.0183; fail to ...
April 21, 2010

chem
K thanks
April 8, 2010

chem
Thanks! And can you calculate the percent yield if they don't give the actual yield?
April 8, 2010

chem
A metal oxide reacts with water to produce a metal hydroxide. What additional information would you need to determine the percent yield of metal hydroxide from this reaction?
April 8, 2010

math
A prescription calls for the 4% Pilocar with a Sig. of "gtt i OU tid". How many 15-ml bottles should be dispensed for a 90 days supply if the eye drop bottle delivers 20 drops per ml? Somehow, it is a bit confusing. I tried: 1 bottle/ml soln * ml soln/20 drops * 3 ...
February 15, 2010

math
FYI You can check the final answer like so: 59 + 74 + 74/3 You should get an answer of 69! Voila!
February 15, 2010

math
Set the problem like this: 59 + x + x / 3 (because it's total 3 tests)) Set the above equal to 69 (your desired result) SO: 2x + 59 = 207 (which is 69 * 3) 2x = 207 - 59 2x = 148 x = 74 She used to scores of 74 to get a mean of 69. Hope this helps!
February 15, 2010

Managerial Accounting
The company reported a 6% operating margin on sales, a 12% pretax operating return on total assets, and $500 million of average total assets. I have calculated the operating income to $60,000,000. How do I calculate the total sales and total asset turn over?
January 30, 2010

algebra
Find the greatest common factor of 6a 3 b 2 c 10 + 20c 10 – 8a 3 b 2 c 9
January 27, 2010

math
how do I solve 1/3 x = 5/12
January 24, 2010

kindergarten math
what does this mean draw a piece of yarn 3 counters long?
January 20, 2010

algebra
A 3-mi cab ride costs $3.00. A 6-mi cab ride costs $4.80. Find a linear equation that models cost c as a function of distance d. write your linear equation using function notation.
January 13, 2010

math
I need to make up ten numbers that are divisible by 2,3,4,5,6,8,and 10.
October 19, 2009

psy 220
describe a situation that might be viewed diffently by two people. this event can be as small as an encounter on the street or as major as the birth of a child
August 2, 2009

Chemistry
so if the equation I'm using is 3CuSO4+2AL(NO3)3 arrow 3CU(NO3)2+Al2(SO4)3 how many moles of CuSO4 would be needed to produce 8 moles of Al2(SO4)3? Would the answer be 8?
April 21, 2009

english
on which line is there a spelling mistake. 1/ reported to the HSE or local authority immediately. A major injury is 2/ construction industry. About one hundred and forty are fatal. This is 3/ hospital treatment lasting more than twenty-four hours.
December 9, 2008

math
b+9=8+7 is the answer b=6 since 8+7=15
November 17, 2008

math
Not sure. example she gave was n-2=4+2 the answer is n=8 but i have to write it out on how i got the answer i have to check my answer
November 17, 2008

math
how about b+9=8+7 would it be b=6 since 8+7=15
November 17, 2008

math
i am in 3rd grade and we are learning about equations. I was not in class when she went over the steps. I need help. y+3=6X2
November 17, 2008

Chemistry
ITS THE ZUMDHAL BOOK!
July 21, 2008

english
can someone help me write a bibliography for my report? what is the format for writing a bibliography?
May 21, 2008

science
A tick that feeds on the blood of animals is a - a. parasite b. host c. predator d. competitor ???help please?
May 14, 2008

physics
A lamp is moved from 26 cm to 90 cm above the pages of a book. Compare the illumination on the book before and after the lamp is move.
May 12, 2008

physics
actually for the second part, it wouldn't be a cylinder but a sphere. thus beta = 2/5. the velocity equation in this case would be V = sqrt[(2gH)/(1+beta)]
April 6, 2008

science
how many bones are there in the human skeletal
February 27, 2008

chemistry
Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C . Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons) with a ...
February 4, 2008

chemistry
Hexane is a hydrocarbon (a molecule containing only carbon and hydrogen) with a molecular weight of 86.18 g/mol, a density of 0.660 g/mL, and a boiling point of 69C . Pentanol is an alcohol (a hydrocarbon with a "OH" group attached to one of its carbons) with a ...
February 4, 2008

math
I need to make up ten numbers that are divisible by 2,3,4,5,6,8,9,10. Please help.
January 17, 2008

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