Thursday
December 18, 2014

Posts by Christina


Total # Posts: 847

algebra
You deposit $3000 in an account earning 7% interest compounded continuously. The amount of money in the account after years is given by A(t)=3000 e^(0.07 t) . How much will you have in the account in 5 years? $ Round your answer to 2 decimal places. How long will it be until ...
November 22, 2014

science
A swimming pool measures 10m by 7m by 2m calculate the full force exerted by the water against the bottom. What is the pressure at the bottom due to the water?
November 21, 2014

Accounting
computer equipment beginning balance is 20,000 working on the adjusted general journal and the scenario is the computer has a 4 year life with no salvage value not sure how to log this
November 15, 2014

science
Bill kicks a rock off the top of his apt building it strikes a window across the street 18m away the acceleration of gravity is 9.8m/s if the window is 25m below the position where bill contacted the rock how long was it ini the air
November 13, 2014

Chemistry 11
Thank you guys so much for helping me! I see my steps were really unnecessary.
November 12, 2014

Chemistry 11
Find the percent composition of a compound containing sodium and chlorine if 24.34g of the compound contains 13.45g of sodium. My work: Molar mass of NaCl: MNa +MCl = 22.99 g/mol + 35.45 g/mol = 58.44 g/mol Percent composition of Na: 22.99 g/mol / 58.44 g/mol x 100 = 39.34% Na...
November 12, 2014

science-gen chem
if 0.969 g of CaCl2 is mixed with 1.111 g of KlO3 how many grams of solid Ca(IO3)2 can theoretically be made? CaCl2(aq) + 2KlO3(aq) ===> 2Kcl(aq) + Ca(lO3)2 (s)
October 27, 2014

Language Arts
In "The Finish of Patsy Barnes," why does Patsy want to race on Black Boy? (1 point) Patsy feels Black Boy owes him a win.** Black Boy is the best horse. Patsy wants to please Brackett. Patsy wants to prove he is a man. 2. What final events in "The Finish of ...
October 1, 2014

math
If the sun is aplroximantely 1.5×10^(11) meters from Earth, what is the approximate distance from Earth to Mars.
September 22, 2014

College Chemistry
Suppose there are two known compounds containing the generic elements X and Y. You have a 1.00-g sample of each compound. One sample contains 0.29 g of X and the other contains 0.38 g of X. Identify plausible sets of formulas for these two compounds. Check all that apply. XY ...
September 3, 2014

Math
The Mills Lunch Shop prepares fresh take-out entrees each day. On Tuesday, 40 baked chicken dinners were prepared at a cost of $3.20 each. A 20% spoilage rate is anticipated. Mills Lunch Shop sells the dinners at an 80% markup based on cost. They decided to offer a $1.00-off ...
August 31, 2014

Geography
Which geographic feature marks the last natural obstacle for Georgia’s rivers on their way to the Atlantic Ocean? (1 point) the Floridian Aquifer the Valley and Ridge region the Fall Line *** (MY ANSWER) the Marshes of Glynn AM I RIGHT?
August 28, 2014

Geography
1. Is all of the above
August 25, 2014

Geography
1.Encouraging crops with longer growing seasons 2.both the first and third answer choices 3.the Fall Line 4.aquifer Am i right Ms. Sue?
August 25, 2014

Geography
Which of the following are impacts that the temperate climate has had on Georgia’s development? (1 point) encouraging crops with longer growing seasons drawing immigrants from other locations encouraging tourism all of the above 3. What impacts have precipitation and ...
August 25, 2014

Geography
Which of the following most accurately describes the difference between climate and weather? (1 point) Climate refers to long-terms conditions; weather refers to daily conditions. Climate refers to severe weather events; weather refers to precipitation. Climate refers to land ...
August 25, 2014

Science
Inductive reasoning is right(: A+
August 15, 2014

Science
In the early 1900s, Alfred Wegener noticed that some of the Earth's continents looked like they might fit together like a jigsaw puzzle. He also observed that the continents that looked like they fit together had similar plants, animals, and rock formations. From this ...
August 15, 2014

physics
Two mirrors are placed at a 90° angle to each other. A light ray strikes one mirror 0.730 m from the intersection of the mirrors with an incident angle of 36.5°. The ray then travels a distance d before reflecting from the second mirror. (a) What is the distance d?
May 12, 2014

general science
if an object is thrown 60 m into the air and it takes the object 6 s to get there, what's the average speed of the object? (A) 20m/s (B) 360 m/s (C) 100 m/s (D) 10 m/s
May 5, 2014

Chemistry
Write the class/family of the following compounds and the functional group in each compound. a. 3-methylcyclohexene b. Cis-3-octene c. 4-methyl-2-heptanone d. 3-bromobenzaldehyde e. 3-bromo-5-chlorotoluene f. 3-chlorophenol g. 6-methyl-2-heptyne Please help!
April 22, 2014

Stats
Find the P-value for a left tailed hypothesis test with a test statistic of z= -1.77. Decide wether to reject the null if the level of significance is alpha= 0.05. Please help I've tried everything and I can't figure out how to get the right answer..
April 17, 2014

Hanus
points Q (10,8) and R (24,10) are the endpoints of a diameter of a circle centered at P. Line l is tangent to the circle at S (12,14). What is the y-intercept of line l?
April 11, 2014

Statistics
In a survey of 621 males ages 18-64 , 396 say they have gone to the dentist in the past year. Construct 90% and 95% confidence intervals for the proportion. Interpret the results and compare the widths of the confidence intervals. Please show step by step. Thank you!
April 7, 2014

Physics
You are given a four-wheeled cart of mass 11 kg, where the distance between a wheel and its nearest neighbors is 2.1 m. Suppose we load this cart with a crate of mass 109 kg, where the crate's center of mass is located in the back-middle of the cart, 0.525 m from its ...
April 6, 2014

Physics
Suppose we take a 1 m long uniform bar and support it at the 27 cm mark. Hanging a 0.31 kg mass on the short end of the beam results in the system being in balance. Find the mass of the beam.
March 28, 2014

Spanish2
Está prohibido fumar. (Write advertisements or signs for the situations described. Use impersonal constructions with se.)
March 17, 2014

pre-calculus
Find the real and imaginary zeros for the following polynomial function. T(b)= 147b^3-35b^2-19b+3
March 6, 2014

RE: Physics
If an incline has a difference in height from one end to the other of 17.8 cm and has a length along the incline of 1.19 m, what is the angle that the incline makes with the horizontal reference surface? Physics - Damon, Saturday, February 15, 2014 at 5:20pm cos (angle) = .178...
February 15, 2014

Physics
So the answer is 81.4? My online homework says that it is wrong?
February 15, 2014

Physics
If an incline has a difference in height from one end to the other of 17.8 cm and has a length along the incline of 1.19 m, what is the angle that the incline makes with the horizontal reference surface?
February 15, 2014

Chem
what mass of hydrogen was in an unknown compound containing only c, h, and o if 2.65kg H2O was produced by combustion analysis
February 12, 2014

US History
gogle it it comes up on yaho answers. I would probably go with A too.
February 11, 2014

US History
The train I believe.
February 11, 2014

physics
In the circuit shown, find the voltage Vx (in Volts) if V = 17.0 Volts, R1 = 13.0 k ohms, R2 = 4.0 k ohms, R3 = 13.0 k ohms and R4 = 21.0 k ohms. Answer is -6.5 I don't understand how they got it, can someone please explain it with steps? Thanks tinypic. c o m/r/2pzhcpl/8
February 11, 2014

Physics
In the circuit shown, find the voltage Vx (in Volts) if V = 17.0 Volts, R1 = 13.0 k ohms, R2 = 4.0 k ohms, R3 = 13.0 k ohms and R4 = 21.0 k ohms. Answer is -6.5 I don't understand how they got it, can someone please explain it with steps? Thanks tinypic. c o m/r/2pzhcpl/8
February 11, 2014

Physics
If the resistances R1= 16. ohms, R2 = 38. ohms, and R3 = 18. ohms, and the voltage V = 6.0 volts, what is the current ix (in Amperes) in the circuit. tinypic .cm /r / nfr48k/ 8 The correct answer is .1443 but I want to know how they got that. Thanks.
February 10, 2014

Math
fgguhutgt6fgkhr
February 3, 2014

Math
32
February 3, 2014

science
You measure the dimensions of a rectangular block of aluminum to determine its volume. It has the following dimensions. length = 10.27 cm; width = 4.92 cm; height = 1.53 cm Assuming that each of these measurements is accurate to the nearest 0.01 cm, find the volume of the ...
February 3, 2014

Science
The sensitivity of a measuring instrument is the value of the smallest quantity that can be read or estimated with it. What is the smallest part of a centimeter that can be read with the following? (a) a meterstick with markings at each millimeter I tried .01 mm .05 mm .1 mm ....
February 3, 2014

Physics
A test rocket is launched by accelerating it along a 200.0-m incline at 1.25m/s2 starting from rest at point A (the figure (Figure 1) .) The incline rises at 35.0 ∘ above the horizontal, and at the instant the rocket leaves it, its engines turn off and it is subject only...
February 2, 2014

Physics
A test rocket is launched by accelerating it along a 200.0-m incline at 1.25m/s2 starting from rest at point A (the figure (Figure 1) .) The incline rises at 35.0 ∘ above the horizontal, and at the instant the rocket leaves it, its engines turn off and it is subject only...
February 1, 2014

Calculus
Consider the solid obtained by rotating the region bounded by the following curves about the line x=1. y=x,y=0,x=4,x=6 Find the volume So it would be pi (integral from 3 to 6) of ((1-y)^2 -(1-0)^2) right? so then you integrate it and get pi(Y^3/3-y^2) from 3 to 6. ?
January 29, 2014

Physics
A 0.5 kg wooden block is dropped from a height of 15 m. At what height must a 5g bullet be traveling upward strike the block in order to momentarily stop its fall? Assume that the time required for the bullet to come to rest in the block in negligibly short, that no internal ...
January 22, 2014

Physics
An explorer in the dense jungles of equatorial Africa leaves his hut. He takes 41 steps at an angle 45∘ north of east, then 81 steps at an angle 60∘ north of west, then 49 steps due south. Assume his steps all have equal length. Save him from becoming hopelessly ...
January 19, 2014

science/math
A car traveling at the speed of 30.0 m/sec encounters an emergency and comes to a complete stop. how much time will it take for the car to stop if its rate of deceleration is -4.0 m/sec
January 16, 2014

social studies
What was the reason for Baltimore's successful shipyards?
January 13, 2014

Social Studies
1. Diversity most closely means (1 point) sharing cultural traits and practices with others. making up a whole of many different parts. being a member of a small ethnic group. having many similar regions next to one another. 2. How does life in Istanbul differ from life in ...
December 10, 2013

Calculus
The area A of the region S that lies under the graph of the continuous function is the limit of the sum of the areas of approximating rectangles. A = lim n → ∞ [f(x1)Δx + f(x2)Δx + . . . + f(xn)Δx] Use this definition to find an expression for the ...
November 24, 2013

Science
It is in ur lesson!
November 18, 2013

Physics
A boat is being towed through a canal by means of ropes which make a 45 degree angle to each other. If a force of 75N is applied to the rope, what is the resultant force pulling the boat forward?
November 3, 2013

math
My online homework says it is wrong. I tried it without the negative sign too
October 20, 2013

math
Two sides of a triangle have lengths 8 m and 24 m. The angle between them is increasing at a rate of 0.05 rad/s. Find the rate at which the area of the triangle is changing when the angle between the sides of fixed length is 135°. Round your answer to two decimal places. ...
October 20, 2013

math
Two sides of a triangle have lengths 15 m and 18 m. The angle between them is decreasing at a rate of 0.08 rad/s. Find the rate at which the area of the triangle is changing when the angle between the sides of fixed length is 120°.
October 20, 2013

chemistry
A lab tech had accidentally set out 16M HCl for this experiment. How much ( in mL) 16M HCl is needed to make 450mL of a 3M HCl solution?
October 7, 2013

chemistry
please help!
September 24, 2013

chemistry
write the balanced equation for the reactions of aquesous pb(CIO3)2 with aqueous Nal. include phases. 2.If a solution containing 86.044 g of mercury(II) chlorate is allowed to react completely cointaing 15.4888 g of sodium sulfide, how many grams of solid precipate will be ...
September 24, 2013

MATH ASAP
Eliminate the parameter to find a cartesian equation x= 1-t^2 y=t-2 -2 _<t _<2 known: -4 <(or=) y <(or =) 0 I got y= sq(x-1)+2
September 14, 2013

math ASAP
Find the point of intersection L1: r(t)= (-5 + 3t)i + (1+t)j L2= r(s) = (1+2s)i + (5-6s)j I know they are perpendicular, and the system of equations I think is t= 4/5 s =8/5 so how do I find the point of intersection
September 14, 2013

math
THANK YOU SO MUCH!
September 13, 2013

math
Find, correct to the nearest degree, the three angles of the triangle with the given vertices.? A(2, 0),B(4, 5), C(-3,2) ANGLE- CAB ANGLE- ABC ANGLE- BCA In degrees. I got the vectors AB <,5> BC <1,3> AC <-1,2> and I know the equation b.c= |b| |c| cos t
September 13, 2013

math
The temperature in the evening was 68 degrees fahrenheit. The following morning, the temperature was 39 degrees fahrenheit. What is the difference between the two temperatures?
August 17, 2013

conceptual physics
How do you calculate the time a boat has traveled at 25 knots
June 14, 2013

Conceptual Physics
How do you calculate the time traveled while traveling 25 knots? It needs to be converted into km/hr.
June 14, 2013

Math
A standard deck of cards has four different suits:hearts ,diamonds ,spades, and clubs.Each suit has 13 cards, making a total of 52.Two cards are drawn without replacement. What is the probability of drawing first a heart, and then a spade?
May 29, 2013

Math
A computer printer can print 3 pages in 25 seconds . Which proportion can be used to find x,the time it will take the printer to print 10 pages?
May 29, 2013

AP Chemistry
CH3NH2(aq)+H2O(l)=>CH3NH3+(aq)+OH-(aq) Kb=4.4 x 10^-4 Methylamine, CH3NH2, is a weak base that reacts with water according to the equation above. A student obtains a 50.0 mL sample of a methylamine solution and determines the pH of the solution to be 11.77. (a) Write the ...
May 2, 2013

Chemistry
If 20 grams of sulfur reacts with an excess of oxygen, what volume of the product SO2 would be collected at 108.5 kPa and 15 degrees Celseius?
April 30, 2013

business
ok ive got pretty much my whole test done but am stuck on this one question Regarding management and leadership, Which statement is most accurate? A. leaders can be good managers,and good managers can be good leaders. B. leaders arent managers and managers arent leaders. C....
April 18, 2013

chemistry
a) Kb=[CH3NH3][OH-]/[CH3NH2][H20] b) -log[H+]=pH=11.77 pH+pOH=14.00 14.00-11.77=2.23=pOH [OH-]=10^-pOH=10^(-2.23)=.0058M
April 4, 2013

LEATURE
C:Dud
April 1, 2013

Chemistry
A sealed flask contains 1 mole of hydrogen and 3 moles of helium gas at 20DC. If the total pressure is 40kPa, what is the partial pressure of the Hydrogen gas? AND :) The data below was obtained by a student in order to determine the percent of water in a Hydrate: Mass of the ...
March 31, 2013

stats
One hundred subjects in a psychological study had a mean of 35 on a test instrument designed to measure anger. The study the ó=10. Find a 99% confidence interval for the mean anger score of the population.
March 24, 2013

Stats.
One hundred subjects in a psychological study had a mean of 35 on a test instrument designed to measure anger. The study the ó=10. Find a 99% confidence interval for the mean anger score of the population.
March 24, 2013

Physics!
The steel I-beam in the drawing has a weight of 9.03 × 103 N and is being lifted at a constant velocity. What is the tension in each cable attached to its ends? With both angles being 70 degrees
March 22, 2013

Physics!
At an instant when a soccer ball is in contact with the foot of the player kicking it, the horizontal or x component of the ball's acceleration is 860 m/s2 and the vertical or y component of its acceleration is 930 m/s2. The ball's mass is 0.38 kg. What is the ...
March 22, 2013

Chemistry
At a given Temperature, the elementary reaction A<--->B in the forward direction is first order in A with a rate constant of 3.90*10^-2s^-1. The reverse reaction is first order in B and the rate constant is 8.20*10^-2s^-1. What is the value at equillibrium for the ...
March 18, 2013

stats.
z=(1.25-1.35)/(0.25sqrt40)= -0.0791 z=(1.50-1.35)/(0325sqrt40)= 0.0791 but not sure how to read the z scores I dont know if it would be.5000-.5000 or what can someone please help me on the z scores for -0.0791 and 0.0791
March 18, 2013

stats.
The mean number of bumped airline passengers per day is 1.35 and the standard deviation is 0.25. For a random selection of a group of 40 days, what is the probability that the mean of bumped passengers for the 40 days will be between 1.25 and 1.50?
March 18, 2013

stats.
so would part a be .4207=(x-550)/100 ?
March 18, 2013

stats.
The GMAT test is required for admission to most graduate programs in business. In a recent year, the GMAT test scores were normally distributed with a mean of 550 and standard deviation of 100. A. Find the first quartile for the distribution of GMAT scores. B. Find the median ...
March 18, 2013

stats.
The mean number of bumped airline passengers per day is 1.35 and the standard deviation is 0.25. For a random selection of a group of 40 days, what is the probability that the mean of bumped passengers for the 40 days will be between 1.25 and 1.50?
March 18, 2013

Stats.
Thank you so much
March 18, 2013

Stats.
The average age of a vehicle registered in the United States is 8 years, or 96 months. Assume the standard deviation is 16 months. If a random sample of a group of 48 vehicles is selected find the probability that the mean of the group’s age is between 90 and 100 months. ...
March 18, 2013

math
$30
March 16, 2013

Physics....PLEASE HELP
A motorcycle has a constant acceleration of 2.13 m/s2. Both the velocity and acceleration of the motorcycle point in the same direction. How much time is required for the motorcycle to change its speed from (a) 24.0 to 34.0 m/s, and (b) 54.0 to 64.0 m/s
March 15, 2013

physics
A model rocket blasts off from the ground, rising straight upward with a constant acceleration that has a magnitude of 91.9 m/s2 for 1.53 seconds, at which point its fuel abruptly runs out. Air resistance has no effect on its flight. What maximum altitude (above the ground) ...
March 15, 2013

Math
If there are 51 students on a bus and 2/3 got off how many students got off the bus
March 14, 2013

Math
If there are 51 students on a bus and 2/3 got off how many students got off the bus
March 14, 2013

math
What weighs less 4.09 kilogram or 4.196 kilogram.
February 28, 2013

Physics
the world may never know.
February 6, 2013

Pre-AP Science
an atom consists of 10 neutrons ,10 electrons,and 9 protons. The atom has gained an electron resulting in a charge of -1. What is its mass number?
February 4, 2013

math
hi i dont know the answer please help me
February 4, 2013

julius caesar
The Roman crown will appear several times in the play. What is your impression of them in this scene? Cant figure this one help!!!!!!!
February 1, 2013

julius caesar
what does the atmophere and the political situation reveal in act one scene 1
February 1, 2013

Math2
A bacteria culture had a population of 10 million at 10:00 A.M., and by 2:00 P.M. had grown to 14 million. (a) Predict the population at 6:00 P.M. that same day. (Round your answer to one decimal place.) (b) When will the population double in size? (Round your answer to the ...
January 30, 2013

Math
The 1989 World Series San Francisco quake was initially reported to have magnitude 7.0, but later this was revised to 7.1. How much energy released corresponds to this increase in magnitude? (Round your answer to two decimal places.)
January 30, 2013

math
could it be h<48 cuz thats one of the answer choices
January 27, 2013

math
in order to be able to ride a roller coaster you must be 48 inches tall .which inequality represents this situation?
January 27, 2013

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