Friday
December 9, 2016

Total # Posts: 440

science
i need a acrostic poem for the word eukaryotic
December 7, 2016

Calculate the single risk premium (to 2 decimal places) to be charged today on an insurance product that pays regular claims of \$500 in 1,2,3,...,25 years from today. Use an interest rate of 4% per annum.
December 7, 2016

Algebra
A taxi charges 1.80 per mile with an initial fee of 12.00 how far can you go with 50.00
November 30, 2016

geometry
A segment has endpoints m(5, -2) and n(-1, -2). After a dilation with center(0,0), M'(10,-4), and N'(-2,-4). If the scale factor is 3x+2, then which of the following is the value of x? a) 0 b)1 c)2 d)3
November 29, 2016

Algebra
A 512-page book has pages 7 inches wide by 9 inches high. The printed area measures 5.375 inches by 7.75 inches. The left margin is 0.3125 inches and the top margin is 0.5625 inches How wide are the margins at the right of each page? How wide are the margins at the bottom of ...
November 27, 2016

Algebra
Ms. Take’s and Ms. Fortune’s classes took the same test. The mean score of the 20 students in Ms. Take’s class was 75. The mean score of the 30 students in Ms. Fortune’s class was 95. Find the mean score for all students.
November 27, 2016

Algebra
6 kg of potatoes cost 12.90 dollars . How many kilograms of potatoes can you get with 8 dollars?
November 27, 2016

Algebra
In triangle QRS, measure of angle R is 20 degrees more than measure of angle Q and measure of angle S is 115 degrees more than measure of angle Q. Find measure of angle R.
October 31, 2016

math
Julia paddleboat travels 2km/h in stilll water. The boat is paddled 4km down stream in the same time it takes to go 1km upstream what is the speed of the river. Please help and show all work I suck at story problems haha
October 29, 2016

Math
If Greg's grill has a sale on hot dogs 4 for \$3 and each hot dog costs the same amount of money how much is 1 hot dog
October 25, 2016

Statistics
Scores on the 1995 SAT verbal aptitude test among Kentucky high school seniors were normally distributed with an average of 420 and the SD of 80. Scores on the 1995 SAT quantitative aptitude test among Kentucky high school seniors were normally distributed with an average of ...
October 25, 2016

english 9
Read the conclusion about “The Beginnings of the Maasai,” and then answer the question. One purpose of “The Beginnings of the Maasai” is to explain the weather. Which excerpt best justifies this conclusion? The sky god is powerful, but can change from ...
October 25, 2016

The speed of a moving sidewalk at an airport is 6 ​ft/sec. A person can walk 42 ft forward on the moving sidewalk in the same time it takes to walk 10 ft on a nonmoving sidewalk in the opposite direction. At what rate would a person walk on a nonmoving​ sidewalk? ...
October 24, 2016

The speed of a passenger train is 8 mph faster than the speed of a freight train. The passenger train travels 310 miles in the same time it takes the freight train to travel 270 miles. Find the speed of each train. What is the speed of passenger​ train? What is the speed...
October 24, 2016

ms. sue wasnt loved as a child
October 20, 2016

Three consecutive odd intergers are such that the sum of the squares of the first two integers is 54 more than 20 times the third integer. Determine the three integers.
October 18, 2016

suppose a triangle has an area of 10ft^2. IF the base of the triangle is 1 foot longer than the height of the triangle, what are the lenghts of the base and height?
October 18, 2016

Math
A farmer bought 16 meters of fencing. He wants to build a rectangular area for his baby chicks. How could the farmer build a fenced in area using all of the fencing, but creating the largest area for his chicks? Using graph paper, cut out, glue and label all the possible ...
October 11, 2016

math
If I roll a pair of dice 500 times what sum would appear the most
October 9, 2016

Chris can be paid in one of two ways. Plan A is a salary of ​\$450 per​ month, plus a commission of 7​% of sales. Plan B is a salary of ​\$681 per​ month, plus a commission of 4​% of sales. For what amount of sales is Chris better off ...
October 6, 2016

October 6, 2016

The perimeter of a rectangular field is 380 yd. The length is 10 yd longer than the width. Find the dimensions. Please help and show work thank you
October 4, 2016

\$9500 is​ invested, part of it at 12​% and part of it at 7​%. For a certain​ year, the total yield is ​\$960.00. How much was invested at each​ rate? PLEASE HELP
October 4, 2016

math
The perimeter of a rectangular field is 380 yd. The length is 70 yd longer than the width. Find the dimensions. Please help
October 4, 2016

math
A train leaves a station and travels north at a speed of 105 mph. Two hours​ later, a second train leaves on a parallel track and travels north at 135 mph. How far from the station will they​ meet? please help
October 4, 2016

Math
Solve using the elimination method. 2x/5 + y/2 = 3 x/2-y/6=2 Please and Thank you
October 4, 2016

urgent mc biology
After the blood in is the left heart you would next find it (a)entering the lungs. (b)entering the tissues, like muscles. (c)entering the right heart. (d)leaving the lungs. (e)leaving the tissues, like the muscles. Please help
September 28, 2016

urgent mc biology
Which of the following do you have less of at the end of cellular respiration than at the beginning? (a)Co-enzyme A (b)ATP synthase (c)ADP (d)the proteins of the electron transport chain (e)FADH2
September 28, 2016

multiple choice biology
Which of the following do you have less of at the end of cellular respiration than at the beginning? (a)Co-enzyme A (b)ATP synthase (c)ADP (d)the proteins of the electron transport chain (e)FADH2 Please help
September 27, 2016

biology
After the blood in is the left heart you would next find it (a)entering the lungs. (b)entering the tissues, like muscles. (c)entering the right heart. (d)leaving the lungs. (e)leaving the tissues, like the muscles. Please help
September 27, 2016

algebra
let f be the function given by f(x)=x^2-4x Find and simplifiy f(x+h)-f(x-h)/h Please show all work Thank you
September 25, 2016

math
let f be the function f(x)=x(x+2) Find and simplify f(x)-f(-x)/2x I tried pluggin in whatever is for x in the first equation and get an answer for each value but it isn't working out can someone please help thank you
September 25, 2016

Language Arts
Thank you!
September 1, 2016

Guys! Really, really need help!
September 1, 2016

Language Arts
Which answer choice lists ALL of the common nouns in the following sentence? A few days before the race, Shauna met the girls on the street. days, race, Squeaky days, race, street days, race, Squeaky, girls days, race, girls, street ***?? In which sentence is the word GESTURE ...
September 1, 2016

Economics
Suppose you are a producer of friendship bracelets. How would the following events affect your/the market's willingness and ability supply friendships bracelets? Match the event on the left to the proper determinant on the right. 1. The price of friendship bracelets ...
July 21, 2016

chemistry
Iron(III) oxide can be reduced to metallic iron by heating it in the presence of carbon. Balance the following equation, then determine the ratio of C to Fe in the reaction? Fe2O3 + C → Fe + CO2?
June 9, 2016

Physics
A man with a mass(mm) of 71.9 kg stands up in a 95-kg canoe(mc) of length(l) 4.00 m floating on water. He walks from a point 0.75 m from the back of the canoe to a point 0.75 m from the front of the canoe. Assume negligible friction between the canoe and the water. How far ...
June 4, 2016

Geometry
Consider circle T with radius 24 in. and θ = radians. What is the length of minor arc SV?
May 23, 2016

English
I have a 60 in English and I need to take 2 tests. (they count as 45% of our grade) I really want to get at least an 82, does anybody know what grades I have to make in order to bring it up? I would really appreciate for a fast reply. Thanks!
May 17, 2016

Algebra
Find the GCF of the terms of the polynomial. 12x+20 A. 2 B. 4 C. 5 D. 10 I think it's B. 4
May 4, 2016

Algebra
Does y=-3(4^x) represent an exponential function? I think it does, but I'm not sure
May 4, 2016

Algebra
May 4, 2016

Algebra
When multiplying two numbers written in scientific notation what do you do with the exponents of the 10? A. multiply B. add C. subtract D. divide I think the answer is A. multiply. Is that correct?
May 4, 2016

Algebra
Thanks!
April 29, 2016

Algebra
Ok, so then the correct answer is C?
April 29, 2016

Algebra
What do you do when you divide two numbers written in exponential notation? A. Add the exponents of the 10 together B. Multiply the exponents of the 10 together C. Subtract one exponent of the 10 from the other D. Divide one exponent of the 10 by the other I think the answer ...
April 29, 2016

College Algebra Help?!
If a customer purchases a new stereo system during the spring sale, he may choose any 4 CDs from 20 classical and 32 jazz selections. In how many ways can the customer choose 2 of each?
April 29, 2016

College Algebra
Thank you so much for your help!
April 12, 2016

College Algebra
The rodent population in a city is currently estimated at 30,000 and is growing according to the Malthusian model. If it is expected to double every 9 years, when will the population reach one million? (Round your answer to one decimal place.)
April 12, 2016

March 23, 2016

Chemistry
a solution is prepared by dissolving 15.0 grams of ni(no3)2 in enough water to make 250 ml of solution what is the molarity of this solution
February 24, 2016

1. A baker had 10 sacks containing the following amounts of flour: 4 ½ kg, 3 ¼ kg, 2 ½ kg, 2 ½ kg, 4kg, 3 ¼ kg, 4 ¼ kg, 5kg, 2 ½ kg, 3 ¼ kg 2. If the baker redistributed the flour equally among the ten bags, how much ...
February 10, 2016

I was talking to you Sid.V Thank you very much 😒😒⚔
February 10, 2016

He is right and if you are wondering, how much does each letter grade count towards your GPA well the answer to that is that an A is worth 3.5-40, B is 2.5-3.49, C is 1.5-2.49, D is 1.0-1.49 and F is 0
February 10, 2016

Science/Math
If a bacteria reproduced every 5 minutes and you start with one at noon, how many will you have after one hour?
December 10, 2015

Physics
NASA lost contact with Pioneer 10 on January 22, 2003. How far in meters was it from the sun on that date? Pioneer 10 was traveling at 12.24 km/s relative to the sun. Calculate the position of Pioneer 10 as of January 2009 relative to the sun. Pioneer is headed toward the star...
December 2, 2015

Physics
011 10.0 points Masses 18 kg and 9 kg are connected by a light string that passes over a frictionless pulley as shown in the figure. The acceleration of gravity is 9.8 m/s2 . 18 kg 9 kg If the 18 kg mass, initially held at rest on the table, is released and moves 1.7 m in 1.4 ...
November 21, 2015

Physics
A motor cycle, starting from rest, has an acceleration of +2.6 m/s^2. When the motorcycle has traveled a distance of 120 m, it slows down with an acceleration of -1.5 m/s^2 until its velocity is +12 m/s. What is the total displacement of the motorcycle?
November 1, 2015

PHYSICS
A salesperson leaves the office and drives 26 km north along a straight highway. A turn is made onto a highway that leads in a direction of 60 degrees. The driver continues on the highway for a distance of 62 km and then stops. What is the total displacement of the salesperson...
October 21, 2015

math
A Ferris wheel has a maximum height of 270 feet and a wheel diameter of 250 feet. Find an equation for the wheel if the center of the wheel is on the​ y-axis and y represents the height above the ground.
October 2, 2015

Physical science
Help tires rated for 60,000 miles and tread depth of 3/8" Hoe do I estimate how much tread is worn off for every mile driven?
October 1, 2015

Physics
A mover has to move a heavy sofa of mass 49.0 kg to the second floor of the house. As he pulls on the rope tied to the sofa, he makes sure that the rope is parallel to the surface of the ramp, which is at 30.0° to the horizontal. If the coefficient of kinetic friction ...
September 24, 2015

Algebra
I would appreciate an explanation of how to simplify this question. Write the fraction as a difference. 3x-7 --- 12
September 18, 2015

Algebra
Simplify the expression (7+5)+4*13-2 I would like an explanation on how to do this question if you can:)
September 18, 2015

math
Bob enlarged the size of a photo to a width of 18 inches. What is the new height if it was originally 6 inches tall and 4 inches wide?
August 31, 2015

Chemistry
okay thanks I didn't know that
July 1, 2015

Chemistry
Predict the answer to each question according to trends in the periodic table. Justify each answer based on the locations of the elements on the periodic table and/or the shell model. a. Which has a greater atomic radius, Al or Cl? b. Which has a greater ionic radius, Na or S...
July 1, 2015

Chemistry
thanks
July 1, 2015

Chemistry
Analyze each table of ionization energy data (in kJ/mol) to identify each element. a. A Period 3 element (1 point) IE1: 496, IE2: 4562, IE3: 6910, IE4: 9453, IE5: 13354, IE6: 16613, IE7:20117 b. A Period 5 element (1 point) IE1: 403, IE2:2633, IE3: 3860, IE4:5080, IE5: 6850, ...
July 1, 2015

Chemistry
Thank you, but how do I solve for the number of moles? I believe the funny symbols are, respectively, are delta signs in front of the S and arrows in the chemical equations.
June 16, 2015

Chemistry
Use each equation to predict whether the relative entropy change is S(products) > S(reactants) or S(products) < S(reactants) and whether Î”S > 0 or Î”S < 0 for the chemical reaction represented. Justify your answer in each case. a. 2NH3(g)&...
June 16, 2015

Geometry
An airplane is flying at a height of two miles above the ground. The distance along the ground from the airplane to the airport is five miles. What is the angle of depression from the airplane to the airport?
June 1, 2015

Chemistry
Write 3â€“4 sentences to describe how coupling reactions are used to drive an unfavorable chemical reaction
May 29, 2015

Chemistry
b) Write 3 â€“ 4 sentences to describe the first law of thermodynamics and use it to describe what happens when two substances at different temperatures come in contact with each other. I know the first law states that "energy can neither be created nor ...
May 29, 2015

Chemistry
Would the reaction for the two metals need something to bond with that doesn't really have an effect, like NO3?
May 22, 2015

Chemistry
Explain the reaction that would occur in a galvanic cell between solutions of Al3+ and Pb2+. Identify the oxidation and reduction reactions and the location of each reaction. Then, use the standard reduction potential tables to determine the cell potential.
May 22, 2015

Chemistry
In 3-4 sentences, identify how the geometric structure of NF3 is different than that of NF4+. Explain how the geometry affects the ability of the molecules to experience a dipole effect. (I did the Lewis diagrams for both but I don't know what to do after that)
May 21, 2015

Physics
The maximum speed of a 3.68-kg mass attached to a spring is 0.688 m/s, and the maximum force exerted on the mass is 11.6 N. What is the amplitude of motion for this mass? (in m) What is the force constant of the spring? (in N/m) What is the frequency of this system? (in Hz)
April 26, 2015

Physics
A large pendulum with a 200-lb gold-plated bob 12 inches in diameter is on display in the lobby of the United Nations building. Assume that the pendulum has a length of 78.4 ft. It is used to show the rotation of the Earth - for this reason it is referred to as a Foucault ...
April 26, 2015

Physics
Steam of mass 11.0 g at 100°C is added to 126.7 g of ice at 0.00°C. Find the final temperature of the system.
April 22, 2015

Physics
After you pick up a spare, your bowling ball rolls without slipping back toward the ball rack with a linear speed of = 3.18 m/s. To reach the rack, the ball rolls up a ramp that rises through a vertical distance of = 0.510 m. What is the linear speed of the ball when it ...
April 20, 2015

Physics
A 10.4-g CD with a radius of 5.85 cm rotates with an angular speed of 33.8 rad/s. What is its kinetic energy? (in J) I need help with this question. I thought you would just use K=1/2mv^2 but when I use m=0.0104kg and v=33.8 I get 5.94 which isn't the correct answer....
April 20, 2015

Physics
A person exerts a tangential force of 34.8 N on the rim of a disk-shaped merry-go-round of radius 2.60 m and mass 152 kg. If the merry-go-round starts at rest, what is its angular speed after the person has rotated it through an angle of 30.4°? (in rad/s)
April 20, 2015

biology
Certain insect species have become more and more resistant to insecticides. What type of natural selection is this, and how does it differ from the other types?
April 15, 2015

Chemistry
What is a balanced equation for a Base-Acid Titration?
April 2, 2015

Chemistry
Just out of curiosity DrBob222, are you a even real doctor?
March 27, 2015

Chemistry
I just needed help, not your opinion if I can do it or not.
March 27, 2015

Chemistry
Well I figured out the equations, I just have no clue on what to do about the "design an experiment" part
March 27, 2015

Chemistry
Tetraphosphorus (P4), commonly known as white phosphorus, forms different compounds with chlorine (Cl2) depending on the amount of chlorine present. If chlorine is limited, phosphorus trichloride (PCl3) is formed. If there is an excess of chlorine, phosphorus pentachloride (...
March 27, 2015

Math
You can predict that Evelyn will roll a sum of 5 about 12 times.
March 1, 2015

Physics
A small box is held in place against a rough wall by someone pushing on it with a force directed upward at 29.8° above the horizontal. The coefficients of static and kinetic friction between the box and wall are 0.400 and 0.320, respectively. The box slides down unless the...
February 15, 2015

Physics
What is the magnitude of the acceleration of two falling sky divers (mass 149 kg including parachute) when the upward force of air resistance is equal to one fourth of their weight? (in m/s^2) After popping open the parachute, the divers descend leisurely to the ground at ...
February 10, 2015

Physics
An elevator (mass 5000 kg) is to be designed so that the maximum acceleration is 0.0620 g. What is the maximum force the motor should exert on the supporting cable? (in N) What is the minimum force the motor should exert on the supporting cable? (in N)
February 10, 2015

Physics
I don't understand how to begin these problems. I'm terrible at physics. Just looking for a little help and you are so rude. If you aren't looking to help kids do/understand their homework you shouldn't be on this site DrBob222.
February 10, 2015

Physics
A 0.133 kg baseball traveling 30.6 m/s strikes the catcher's mitt, which, in bringing the ball to rest, recoils backward 11.4 cm. What was the average force applied by the ball on the glove? (in N)
February 10, 2015

Physics
A place kicker must kick a football from a point 35.0 m (= 38.3 yd) from the goal, and the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 19.8 m/s at an angle of 45.0o to the horizontal. By how much does the ball ...
February 1, 2015

Physics
A projectile is launched with an initial speed . At its highest point, the projectile's speed is . What was the launch angle above the horizontal? (in deg)
February 1, 2015

Physics
Riding in an elevator, a man notices that he feel heavier or lighter based when the elevator speeds up or slows down. He stands on a bathroom scale in the elevator to take some measurements. Assume that his mass is 85 kg. a. What is this man’s weight while at rest? b. ...
February 1, 2015

Algebra
\$20, \$25, \$30, \$21, \$10, \$15, \$11, \$5, \$6, \$1
February 1, 2015

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