# joey

Popular questions and responses by joey-
## Precalculus

The height (in centimeters) of a candle is a linear function of the amount of time (in hours) it has been burning. When graphed, the function gives a line with a slope of -0.4 . Suppose that the height of the candle after 13 hours is 24.8 centimeters. What

*asked on March 24, 2014* -
## Pre Calculus

A piece of cardboard measuring 13 inches by 11 inches is formed into an open-top box by cutting squares with side length x from each corner and folding up the sides. a. Find a formula for the volume of the box in terms of x b. Find the value for x that

*asked on April 29, 2016* -
## History

Which describes the terms of the agreement at the 38th parallel? A. This armistice defined the 38th parallel as the dividing line between the careers, and though it called for cease-fire, it did not cite in official end of that war. B. This nonaggression

*asked on August 1, 2019* -
## Vince

Please show work for Determine the final end (final) value of n in a hydrogen atom transition, if electron starts in n = 1 and the atom absorbs a photon of light with an energy of 2.044 X 10^-18J? thank you very much for your help

*asked on September 17, 2015* -
## Chemistry

Write the balanced dissociation equation for MgCl2. (1 mark) MgCl2(s) + H2O(l) ==> Mg^+2(aq) + 2Cl^-(aq) b) In 300.0 mL of a 0.50 M MgCl2 solution, what would be the concentration of the chloride ions?

*asked on July 27, 2020* -
## physics

Extreme-sports enthusiasts have been known to jump off the top of El Capitan, a sheer granite cliff of height 910m in Yosemite National Park. Assume a jumper runs horizontally off the top of El Capitan with speed 5.0m/s and enjoys a freefall until she is

*asked on April 21, 2012* -
## science

Suppose that the 1.3 km span of the golden gate bridge had no expansion joints. Calculate how much longer the bridge would be if the temperature of the bridge increases by 35 degrees celsious

*asked on March 1, 2013* -
## Chem 400

Direct reaction of solid iodine (I2) and gaseous chlorine (Cl2) produces an iodine chloride,(IxCly), a bright yellow solid. 0.678 g of iodine (I2) is mixed with 0.851 g of chlorine (Cl2). After the elements react, some chlorine is left over along with a

*asked on October 1, 2014* -
## physics

A uniform solid sphere rolls down an incline. (a) What must be the incline angle if the linear acceleration of the center of the sphere is to have a magnitude of 0.20g? 1° (b) If a frictionless block were to slide down the incline at that angle, would its

*asked on January 5, 2011* -
## Trigonometry

Mountain officials want to build a new ski lift from B to C as shown in the figure below. The distance from A to C is 1480 feet. They measure angle DAC to be 32 degrees and angle DBC to be 18 degrees. What is the distance A from to B? Round your answer to

*asked on March 18, 2014* -
## Statistics

A local grocery store wants to estimate the mean daily number of gallons of milk sold to customers. Assume the number of gallons sold follows the normal distribution, with a population standard deviation of 5.10 gallons. A random sample of 60 days shows

*asked on October 27, 2013* -
## 6th grade math

A chocolate bar is separated into several equal pieces. If one person eats 1/4 of the pieces, and a second person eats 1/2 of the remaining pieces, there are six pieces left over. Into how many pieces was the original bar divided?

*asked on August 27, 2009* -
## trig

Find csc(theta), tan (theta), and cos (theta), where theta is the angle shown in the figure. Give exact values, not decimal approximations c=10 b=7 a=7.14 the right angle is locate between sides a and b and the theta angle is an acutle angle sides b and c.

*asked on March 24, 2014* -
## Biology- check my answer (diff one)

Which of the following are true concerning living things? Check all that apply. A)They contain a vital force absent in nonliving things. B)They are composed of molecules that contain carbon-carbon bonds. C)They undergo chemical reactions to use energy they

*asked on December 19, 2012* -
## Math 111

Find a 4 degree polynomial having zeros -6,-3,2 and 6 and the coefficient of x^4 equal 1 The "coefficient of x^4 equal 1" is really throwing me off. Thanks.

*asked on November 5, 2011* -
## PHYSICS

A circular curve of highway with radius 200m is designed for traffic moving at 100km/h, and is banked so that cars can make the curve even without friction at that speed. What is the correct angle of banking for this curve? Show steps, please.

*asked on April 19, 2010* -
## biology

In guinea pigs, the allele for a rough coat (R) is dominant over the allele for a smooth coat (r). A heterozygous guinae pig (Rr) and a homozygous recessive guinea pig (rr) have a total of nine offspring. The punnett square for this cross shows a 50

*asked on February 27, 2010* -
## Calculus

A construction company wants to build a rectangular enclosure with an area of 1000 square feet by fencing in three sides and using its office building as the fourth side. Your objective as supervising engineer is to design the enclosure so that it uses the

*asked on August 9, 2011* -
## Physics

A wheel rotating initially at an angular velocity of 1.0 rad/s, accelerates over a 10 S interval at a rate of 0.1 rad/s^2. What angular displacement does the wheel undergo in this 10 S interval, in terms of revolutions?

*asked on November 21, 2016* -
## math

Can someone help with me this question? 1. Lea spent $25 of the money she saved. She still has 60% of her money left. How much does have left? 0.60 x 25=$15? 2. A 2.6L container of juice costs $3.00. How much are you paying for 1 L?

*asked on November 14, 2011* -
## math

A standard deck of cards has had all the face cards (Jacks, queens, and kings) removed so that only the ace through ten of each suit remains. A game is played in which two cards are drawn (without replacement) from this deck and a six-sided die is rolled.

*asked on February 24, 2011* -
## chemistry

What is the osmotic pressure at 25°C of a solution containing 0.50 mol/L of Al(NO3)3?

*asked on December 14, 2019* -
## American Governent

1. What type of power does the Constitution grant to the Supreme Court? (1 point) executive power federal power judicial power legislative power 2. Which are examples of judicial restraint in the Supreme Court? Select all that apply. (3 points) The verdict

*asked on December 12, 2016* -
## Biology-check my answer

Hershey and Chase used the 35S isotope to label proteins. How does this isotope differ from the 32S isotope found in greatest natural abundance, and why did they choose 35S instead of 32S? A)35S has more protons than 32S; Hershey and Chase used it because

*asked on December 19, 2012* -
## government

What is the relationship between global conflicts, international trade, and foreign relations among the nations of the world?

*asked on May 26, 2020* -
## Calculus

The management of the UNICO department store has decided to enclose an 870 ft2 area outside the building for displaying potted plants and flowers. One side will be formed by the external wall of the store, two sides will be constructed of pine boards, and

*asked on April 13, 2015* -
## science

A force of 20 n gives a ball an acceleration of 4.0 m/s3 on a lever frictionless surface. what is the mass of the ball?

*asked on June 17, 2014* -
## math

express each answer in exponential form using the indicated bases 4x4x4x4,base 2

*asked on June 25, 2013* -
## Physics: Vectors

A hiker walks 10.0 km[NE], 5.0 km[W], and then 2.0 km[S] in 2.5 h. (a) What is the hiker's displacement? (b) In what direction must the hiker set out, in order to return by the most direct route to the starting point? (c) If the hiker walks at a constant

*asked on June 19, 2012* -
## Geometry

B is the midpoint of segment AC. AB= 5X and BC =3X+4 find AB, BC and AC

*asked on October 5, 2011* -
## physics

An automobile traveling at 50.0 km/h has tires of 100.0 cm diameter. (a) What is the angular speed of the tires about their axles? 1 rad/s (b) If the car is brought to a stop uniformly in 25.0 complete turns of the tires (without skidding), what is the

*asked on January 5, 2011* -
## physics

A plum is located at coordinates (-4.0 m, 0.0 m, 6.0 m). In unit-vector notation, what is the torque about the origin on the plum due to force F whose only component is indicated by each of the following equations? (a) Fx = 8.0 N ô = N · m (b) Fx = -5.0

*asked on January 5, 2011* -
## Calculus (optimization problem)

A cyclinderical tank with no top is to be built from stainless steel with a copper bottom. The tank is to have a volume of 5ð m^3. if the price of copper is five times the price of stainless steel, what should be the dimensions of the tank so that the

*asked on March 24, 2010* -
## math

what is 1.07 x 10^3 in standard form

*asked on November 8, 2017* -
## Geometry

the steps that you would follow to recreate a triangle using a protractor, a string, and the AAS Congruence Theorem, written out in words. I'm lost know that you need two angles and a side.No clue how to explain. Please help I've been sitting here all day

*asked on October 26, 2017* -
## Pre Calculus

A cylinder shaped can needs to be constructed to hold 200 cubic centimeters of soup. The material for the sides of the can costs 0.02 cents per square centimeter. The material for the top and bottom of the can need to be thicker, and costs 0.06 cents per

*asked on April 29, 2016* -
## Calculus

Differentiate. g(x) = 5e^x√x

*asked on October 4, 2015* -
## Physics

A 4.12 kg mass undergoes an acceleration along both the x and y directions. Ax = -2.60 m/s2 and Ay = 3.50 m/s2. Find the magnitude of the resultant force. Answer in units of N.

*asked on March 2, 2015* -
## physics, math

Part A & B are 0.10m apart. A point charge of +3.0*10^-9C is placed at A and a point charge of +1.0*10^-9C is placed at B. X is a point on the straight line through A and B. If a third charge C or charge 1.5*10^-9 is placed at X, where must X be for the

*asked on September 14, 2014* -
## trig and geometry

bernhardt and julia are observing an eagles nest in a tree. Julia is 75m from the tree, and sees it at an angle of elevation of 42 degrees A)How high up the tree is the nest B)Bernhardt is standing 30m behind julia. At what angle of elevation does he see

*asked on March 2, 2012* -
## science

Does an ammeter consist of a loop of wire in a magnetic field?

*asked on June 6, 2011* -
## math

jake has 3/4 of a dollar. maxwell has 1/10 of a dollar. do they have more or less than $1.00 in all

*asked on March 17, 2011* -
## Chemistry

1- Determine the [OH-] and pH of a solution that is .250 M in HCO-3 2- Calculate the [H3O+] and pH of each polyprotic acid solution: a) .125 M H2CO3 b) .125 M H3C6H5O7

*asked on March 14, 2011* -
## English

How do these develop theme of these allusions from Hamlet? 1. "I would have such a fellow whipped for o'erdoing Termagant" (II,ii,14) So basically Hamlet is telling his actors not over act during the play. 2. “For O, For O, the hobbyhorse is forgot”

*asked on November 11, 2010* -
## math

what is the fraction between 4/9 and 5/9

*asked on May 16, 2010* -
## Math

If 4 sin^2 θ - 3 is equal to 0 . What is the value of θ for 0° < θ < 90° ?

*asked on June 15, 2020* -
## Math

How many terms of the A.P, 1+4+7+.......are required to make a sum of 590?

*asked on May 14, 2020* -
## Chemistry La

An unknown solution may contain some of the cations listed below. One student preformed a series of experiments to determine what ions are in the solution. Based upon the experiments performed by the students, the results are as follows: a) On addition of

*asked on October 5, 2017* -
## Maths

Solve algebraically: x^2 + y^2 = 18 x - 2y = -3. Thanks.

*asked on March 30, 2017* -
## Maths

Prove algebraically that the difference between any two different odd numbers is an even number. Thanks.

*asked on March 30, 2017* -
## Math (Fraction Word Problem)

You have three-fifths of a pizza leftover, and you plan to eat half of it for lunch. How much of the original pizza do you have left over? If I have 3/5 of a pizza leftover and I plan to eat 1/2 of it for lunch doesn't that mean you have to divide? This is

*asked on October 27, 2016* -
## Physic

ON is the vertical plumb line.A horizontal force F applies at M to push the piston at O and N,with the help of rods MO,MN.The rods MO,MN have the same length,when the distance of ON is 200cm,the distance of M to the plumb line ON is 10cm.Assuming the

*asked on March 28, 2016* -
## Chemistry Dimensional analysis

A cyclist rides at an average speed of 18 miles per hour. if she wants to bike 212km, how long in hours must she ride? What I have so far.. 212km(10^3 miles

*asked on February 7, 2016* -
## Chemistry

A 0.200 g sample of carbon dioxide, CO2, has a volume of 525 mL and a pressure of 473 mmHg . What is the temperature of the gas in kelvins?

*asked on November 27, 2015* -
## Calculus

The volume V of a growing spherical cell is V =4/3πr^3, where the radius is measured in micrometers (1 µm = 10^−6m). Find the average rate of change of V with respect to r when r changes from 3 to each of the following. i)3 to 6µm ii)3 to 4µm

*asked on October 31, 2015* -
## physics

A novice golfer on the green takes three strokes to sink the ball. The successive dis- placements are 7 . 7 m to the north, 1 . 9 m 45 ◦ north of east, and 8 . 7 m 76 ◦ west of south. Starting at the same initial point, an expert (lucky) golfer could

*asked on October 29, 2015* -
## Chemistry

How come lead is denser than copper though more copper atoms can fit into a same size cube than lead atoms can?

*asked on June 29, 2015* -
## chimistry

The molar heat of fusion of lead (Pb) is 1.140 kcal/mol. How much heat must be added to 97.0 g of solid lead at its melting point in order for it to completely melt? A 1.44 kJ B 10.18 kJ C 12.48 kJ D 25.04 kJ

*asked on June 24, 2015* -
## Math 120

Write 4logb(X)-1/3logb(y)+2logb(z)as a single logarithm Its log base b.

*asked on December 3, 2014* -
## Calculus

A light is hung 15 ft above a straight horizontal path. If a man 6 ft tall is walking away from the light at the rate of 5 ft/sec, how fast is his shadow lengthening and at what rate is the tip of the man’s shadow moving?

*asked on October 6, 2014* -
## Chemistry 400/ Chem 1A

A chemist mixes 5.216 g of potassium permanganate, 2.318 g of ethanol, and excess sulfuric acid. These chemicals react as follows: 4 KMnO4 + 5 C2H5OH + 6 H2SO4 ---> 4 MnSO4 + 5 CH3COOH + 2 K2SO4 + 11 H20 What mass of sulfuric acid is consumed in this

*asked on September 15, 2014* -
## Physics

A 55.0kg cheerleader uses an oil-filled hydraulic lift to hold four 130kg football players at a height of 1.20m. If her piston is 19.0cm in diameter, what is the diameter of the football players' piston?

*asked on November 14, 2013* -
## phyics

A hand exerciser utilizes a coiled spring. A force of 86.9 N is required to compress the spring by 0.0231 m. Determine the force needed to compress the spring by 0.0432 m.

*asked on November 12, 2013* -
## phyics

An object on a vertical spring oscillates up and down in simple harmonic motion with an angular frequency of 25.1 rad/s. Calculate the distance d by which the spring stretches from its unstrained length when the object is allowed to hang stationary from

*asked on November 12, 2013* -
## phyics

A 0.20-kg object is attached to the end of an ideal horizontal spring that has a spring constant of 120 N/m. The simple harmonic motion that occurs has a maximum speed of 1.1 m/s. Determine the amplitude A of the motion.

*asked on November 12, 2013* -
## physics

The four tires of an automobile are inﬂated to a gauge pressure of 1.7 × 10 5 Pa. Each tire has an area of 0.023 m2 in contact with the ground. Find the weight of the automobile. Answer in units of N

*asked on February 12, 2013* -
## statistics

Which of the following is NOT true with respect to the properties of probability? 0 < x < 1 P(S) = 1, where S is the sample space P(A) + P(Ac) = 0 If two events are independent then P(A and B) = P(A) * P(B)

*asked on November 15, 2012* -
## Differential Calc

If: 0 = f(1) = a+b+c+d 2 = f(-2) = -8a+4b-2c+d 0 = f'(1) = 3a+2b+c 0 = f'(-2) = 12a-4b+c "since we now have four equations and four unknowns, we can determine unique solution. Solving for "a" and "b", a=, b=" Please show the steps, I am so confused and no

*asked on November 5, 2012* -
## Physics help!!

A Styrofoam bucket of negligible mass contains 1.60 kg of water and 0.425 kg of ice. More ice, from a refrigerator at -14.8 degree C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket

*asked on April 16, 2012* -
## Physics help!!

A Styrofoam bucket of negligible mass contains 1.60 kg of water and 0.425 kg of ice. More ice, from a refrigerator at -14.8 degree C, is added to the mixture in the bucket, and when thermal equilibrium has been reached, the total mass of ice in the bucket

*asked on April 16, 2012* -
## chemistry

A certain liquid has vapor pressures of 50 Torr. 1 mol of an involatile solute is dissolved in 1 mol of this liquid. What is the vapor pressure of the liquid above this solution?

*asked on March 19, 2012* -
## analytic geometry

fin the center ,principal axis vertices, sketch the graph of 4x^-y^2 +56 x +2y+195=0

*asked on February 9, 2012* -
## statistics

A manager states that in his factory, the mean number of days per year missed by his employees is less than the national mean of 10. The following data is days missed by some of his employees last year (mean=5.025, standard deviation=3.634). Is there

*asked on October 1, 2011* -
## Math 111

This is a question that deals specifically with WebWork. Here is the question: Write the set of points from -2 to 4 but excluding -1 and 4 as a union of intervals my solution to this would be: [-2,4]U(-1,4) my reasoning: The first set includes -2 and goes

*asked on September 29, 2011* -
## Enviromental Science

It is true that ______ a) few plants grow well around water b) plants are better able to seek water than are animals c) water covers about 95% of the plants d) the amount of water in the enivronment limits the kinds of organisms that can live there e)

*asked on May 31, 2011* -
## science

if a force of 50 N stretches a spring 250 mm, what is the spring constant?

*asked on February 10, 2011* -
## english

use yellow flower in a sentence

*asked on January 17, 2011* -
## Physics-Please help with formula

If you were in a rotor style ride and the riders accelerate until the speed of ride is reached- if the radius of the cylinder is 5.0m and the coefficient of friction between clothes and wall is 0.5, how do you find minimum speed you would need to stick to

*asked on December 7, 2010* -
## English

Why did Shakespeare intent hamlet to have an oedipal complex? I am thinking because to make the character interesting? :S

*asked on November 5, 2010* -
## chemistry

Your body deals with excess nitrogen by excreting it in the form of urea, NH2CONH2. The reaction producing it is the combination of arginine (C6H14N4O2) with water to give urea and ornithine (C5H12N2O2). C6H14N4O2 + H2O NH2CONH2 + C5H12N2O2 [Molar

*asked on October 7, 2010* -
## physics

Two cars both start from rest and have the same constant acceleration. When radar is used to measure the velocity of each car, car A is found to be moving twice as fast as car B. At the instant the radar is used, car A has a displacement that is ______

*asked on September 13, 2010* -
## chemistry

how many grams of NaOH must be added to 0.250 litres of water to form a solution of PH=10.0?

*asked on September 7, 2010* -
## biology

In sheep, the allele for white wool (A) is dominant over the allele for black wool (a). How would you determine the genotype of a white ram, or male sheep?

*asked on February 27, 2010* -
## Psychology

How can BATNA assist clients in human services?

*asked on July 14, 2009* -
## johnglenn

Discuss some of the advantages to having a cycle that partially replenishes itself. In the Calvin cycle, what would happen to the cycle if there was no carbon dioxide available

*asked on April 23, 2009* -
## psychology

discuss the role of fathers in childhood development? i've read the section and it does not really mention about the father, but mostly the motehr.

*asked on March 31, 2009* -
## statistics

Determine the sample size required to estimate a population proportion to within 0.032 with 95.7% confidence, assuming that you have no knowledge of the approximate value of the sample proportion. Sample Size = B. Repeat part the previous problem, but now

*asked on March 28, 2009* -
## Math

how would you solve this problem? Adult tickets to a play cost $12 and children's tickets cost $5. If 220 tickets were sold and $2542 was collected, how many of each kind of ticket was sold? There are 500 seats in the theater and 280 seats are already

*asked on October 26, 2008* -
## math

3 coins are flipped, find the probabilities of: a) P(two heads) b) P(at most two heads) c) P(no heads)

*asked on October 23, 2008* -
## algebra problem

If you have the sume of squares of the digits of a positive two-digit number is 20, the tens digit is 2 more than the units digit. answer is 2^2 and 4^2 (?)

*asked on April 18, 2008* -
## Science

A drop of ink is in a tube.A stopper is used.What will happen to the drop of ink in the tube when you place your hands around the flask for 5 minutes? Is water in the tube? And what's the stopper used for? If so, heat is transferred from the hand to the

*asked on August 8, 2007* -
## Earning capacity

How can we estimated the future earning capacity of an enterprise? Crystal Ball? The key here is estimate. Anyone can estimate. Past performance indicates many future trends. Changing markets indicated changes also. But in reality, these are estimates

*asked on January 21, 2007* -
## Econ(again)

When state-owned enterprises are sold, how should their values be established? Should the value be based on the cost of the assets in place, the past earning power of the enterprise, or the future earning potential in a competitive economy? The value

*asked on January 21, 2007* -
## Employment

What effect will the privatization of currently state-run enterprises have on the employment levels in those enterprises in the short run? and in the long run? In the short run, employment will drop as the enterprise will have to reduce operating costs to

*asked on January 21, 2007* -
## Math

A sports club found that 100 of its members played at least one of football, tennis or badminton. Thirty-nine played football, 31 played tennis and 51 played badminton. Of these, 9 played both football and tennis, 8 played both tennis and badminton and 10

*asked on April 29, 2020* -
## chemistry

How much heat is needed to convert 840. g of ice at -20°C to steam at 134°C?

*asked on December 17, 2019* -
## chemistry

What is the final temperature when 1.16 kJ of energy is added to 11.0 g ice at 0°C? Assuming the specific heat of ice is 2.03 J/g * C.

*asked on December 5, 2019* -
## physics

It is observed that rider A closes the 48 gap in a time of 6 seconds (a=ft/s^2). a) What speed was rider A moving while located 48 feet behind rider B? b) As timed from when rider A was 48 feet behind rider B, how many seconds elapse before rider A matches

*asked on November 10, 2019* -
## world history

i just need help with one question i want to make sure if i am correct or should i change my answer? during the ice age,people migrated from asia across what is now bering strait to ? a.east africa b.west africa c.europe d.the americas i think its c or d i

*asked on October 7, 2019* -
## Math

What is 80-40+4 x 3^2

*asked on August 26, 2019*