# MIKE

Popular questions and responses by MIKE-
## Chem

Consider the balanced chemical equation: 3Sr(OH)2(aq) + 2H3PO4(aq) → Sr3(PO4)2(s) + 6H2O(l). How many moles of Sr(OH)2 remain if 0.10 mol of H3PO4 react with 0.40 mol of Sr(OH)2?

*asked on August 20, 2011* -
## Chemistry Help

The ΔHvap of a certain compound is 34.68 kJ·mol–1 and its ΔSvap is 93.60 J·mol–1·K–1. What it the boiling point of this compound?

*asked on February 10, 2013* -
## Calculus - Need help please

Given the following function, y=tan(pi-3x) 1)determine the interval for the principal cycle. (^ Type your answer in interval notation) 2)Then for the principal cycle, determine the equations of the vertical asymptotes 3)find the coordinates of the

*asked on August 4, 2016* -
## chemistry

For a particular isomer of C8H18, the following reaction produces 5113.3 kJ of heat per mole of C8H18(g) consumed, under standard conditions. C8H18(g) + 25/2(O2)(g) -> 8CO2(g) + 9H2O(g) DeltaH= -5113.3 kJ What is the standard enthalpy of formation of this

*asked on January 29, 2012* -
## Physics

A bullet with a mass of 28 g is fired from a 2.8-kg gun that is stationary, but free to recoil. After the bullet is fired, the gun is observed to be moving at 1.4 m/s [left]. What is the velocity of the bullet?

*asked on January 23, 2018* -
## maths

a car weighing 1600kg moving with a velocity of 30 meter per second retarded uniformly coming to rest in 20 seconds calculate 1, initial momentum 2, final momentum 3, rate of change of momentum 4,acceleration of the car 5, magnitude of the force apply

*asked on January 28, 2016* -
## physics

a popgun uses a spring for which k = 20 N/cm. when cocked, the spring is compressed 3.0 cm. how high can the gun shoot a 5.0-g projectile

*asked on December 13, 2010* -
## covalent or ionic bond

Is Mercury (ii) Chloride a covalent bond or ionic?

*asked on May 4, 2009* -
## mathematics

Two questions here: 1. In a right-angled triangle ABC, catheter AC is 9.4 cm long and catheter BC is 6.2 cm long. D is a point on the catheter AC so that DA = DB. Determine the length of the CD. 2. In a right-angled triangle, the ratio of catheters is 2:

*asked on July 15, 2020* -
## chemistry

calculate the change in pH when 9.00ml of 0.100M HCl(aq) is added to 100.0mL of a buffer solution that is 0.100M in NH3(aq) and 0.100M NH4Cl(aq). ...Calculate the change in pH when 9.00,L if 0.100M NaOH(aq) is added to the original buffer solution.

*asked on October 28, 2012* -
## math

what is 22 2/9% as a fraction?

*asked on December 16, 2008* -
## Calculus

The demand function for the Luminar desk lamp is given by the following function where x is the quantity demanded in thousands and p is the unit price in dollars. p = f(x) = -0.1x2 - 0.3x + 39 (a) Find f '(x). f '(x) = (b) What is the rate of change of the

*asked on June 13, 2013* -
## Chemistry

In a mountainous location, the boiling point of pure water is found to be 95 degrees Celsius. How many grams of sodium chloride much be added to 1 kg of water to bring the boiling point back to 100 degrees Celsius? Assume that sodium chloride behaves

*asked on September 14, 2010* -
## algebra

Determine K and M if x=y Does this mean m=0 k=1?

*asked on July 15, 2020* -
## spanish

We sing a song entitled He drinks tequila,and she talks dirty in spanish ^ there are a couple of phrases that I don't know the meaning of could you help please. the first is "a brasa mi puerta" The second is "to dal ay nochay" I hope this is not offensive

*asked on November 21, 2009* -
## mathematics

Jessica has received a scholarship. She invests the money in a fund that provides 3.5% in annual interest. By what percentage does the investment grow over five years?

*asked on July 15, 2020* -
## Physics

A wooden block of mass m = 9 kg starts from rest on an inclined plane sloped at an angle θ from the horizontal. The block is originally located 5m from the bottom of the plane. If the block, undergoing constant acceleration down the ramp, slides to the

*asked on February 3, 2013* -
## Math

The table below shows the scores of a group of students on a 10-point quiz. Test Score Frequency 3 1 4 1 5 2 6 3 7 1 8 1 9 1 10 4 The mean score on this test is: The median score on this test is:

*asked on July 16, 2020* -
## Math

A colony of bees doubles in population every 5 weeks.hpw long does it take for the population to triple ?

*asked on February 3, 2017* -
## math-

A new model of car is available in 4 exterior colors and 3 interior colors. Use a tree diagram and specific colors to show how many color schemes are possible for the car. Solve the problem using an alternative method as well.Note that you are asked to

*asked on August 10, 2009* -
## calculus

A potter forms a piece of clay into a right circular cylinder. As she rolls it, the height h of the cylinder increases and the radius r decreases. Assume that no clay is lost in the process. Suppose the height of the cylinder is increasing by 0.5

*asked on March 31, 2013* -
## physics

Seat belts and air bags save lives by reducing the forces exerted on the driver and passengers in an automobile collision. Cars are designed with a "crumple zone" in the front of the car. In the event of an impact, the passenger compartment decelerates

*asked on October 2, 2010* -
## Algebra

For the function f (x) = C ∙ a^x the following relation applies: f(6) / f(4) = 0.25 f(2) - f(3) = 20000 Solve f(5) Solve f(x) = 625

*asked on July 15, 2020* -
## Calculus check my answers

1. The general solution of the differential equation dy - 0.2x dx = 0 is a family of curves. These curves are all: a. lines b. hyperbolas c. parabolas (my answer) d. ellipses 2. The table below gives selected values for the function f(x). Use a trapezoidal

*asked on July 2, 2018* -
## ***PLEASE SCIENCE****

I have this question: Which is the smallest unit of measurement for temperature? One Celsius degree: one Kelvin:one Fahrenheit. I think it is Kelvin but I can't find anywhere in my book where it refers to that. When I google all three it says Celsius &

*asked on October 10, 2012* -
## Physics- torque

A man ties one end of a strong rope 8.35 m long to the bumper of his truck, 0.506 m from the ground, and the other end to a vertical tree trunk at a height of 3.92 m. He uses the truck to create a tension of 8.32x10^2 N in the rope. Compute the magnitude

*asked on November 18, 2013* -
## chemistry

In a particular redox reaction, Cr is oxidized to CrO4^2– and Cu2^+ is reduced to Cu^+ . Complete and balance the equation for this reaction in acidic solution. Cr + Cu^2+ ---> CrO4^2-+ Cu^+ i started off by doing this 2 x SO3^2- ---> SO4^2- + 2e 2 x

*asked on February 13, 2012* -
## Financial Management

TLB EXHIBIT 1 SUMMARY OUTPUT Regression Statistics Multiple R 0.397871332 R Square 0.158301597 Adjusted R Square 0.146771482 Standard Error 0.099101922 Observations 75 ANOVA df SS MS F Significance F Regression 1 0.134839089 0.134839089 13.72940301

*asked on April 14, 2009* -
## English

In “A Sound of Thunder,” Travis’s dialogue with Lesperance reveals how upset he is about Eckels’ having left the path. This is an example of direct characterization.******** indirect characterization.

*asked on November 2, 2015* -
## statistics

Two dice are rolled and two fair coins are tossed. Let X be the sum of the number of spots that show on the top faces of the dice and the number of coins that land heads up. The expected value of X is _____ .

*asked on July 22, 2011* -
## Art 17th Century Europe

Contrast the "Elevation of the Cross" by Rubens with Rembrandt's Return of the Prodigal Son. How does each work demonstrate the Baroque style? How does each work mirror the social and political climate of the time? **Hope someone can Help,Please! =)

*asked on March 31, 2011* -
## math

3/5 of a revolution represents approximately how many radians? Question 12 options: 6.28 3.14 3.77 108.00

*asked on January 21, 2018* -
## Algebra

Which is the degree measure of an angle whose tangent is 5.67? Round the answer to the nearest whole number.

*asked on May 19, 2014* -
## Statistics

A 95% confidence interval for a population mean, ?, is given as (18.985, 21.015). This confidence interval is based on a simple random sample of 36 observations. Calculate the sample mean, x ?, and the sample standard deviation, s. Assume that all

*asked on June 18, 2012* -
## math

There are 50 jellybeans which are red, orange, green, and yellow, how many ways can you place the beans in a row providing each color are identical? And, how many handfuls of 12 are possible?

*asked on October 27, 2011* -
## Physics,Science

Two point charges Q1 = 10µc and Q2 = -2µc are arranged along the x-axis at x = 0 and x =4m respectively. Find the positions along the x-axis where v = 0

*asked on March 24, 2019* -
## Math

The time t required to drive a certain distance varies inversely with the speed r. If it takes 4 hours to drive the distance at 35 miles per hour, how long will it take to drive the same distance at 45 miles per hour? about 3.11 hours********* 140 hours

*asked on May 11, 2016* -
## Chemistry

Why are some solutes soluble in water, but others are soluble in cyclohexane?

*asked on November 16, 2017* -
## MATH

Misu Sheet, owner of the Bedspread Shop, knows his customers will pay no more than $110 for a comforter. Misu Sheet wants to advertise the comforter as "percent markup on cost." a. What is the equivalent rate of percent markup on cost compared to the 30%

*asked on February 16, 2014* -
## Math

Put the function P= 35(1.3)^t in the form P0ekt When written in this form, you have: K= P0=

*asked on August 28, 2012* -
## Algebra

Find the correct table of values for the following function:y = x – 3 x y 10 8 8 6 6 4 x y 10 13 8 11 6 9 x y 10 7 8 5 6 3 x y******************** 10 3 8 3 6 3

*asked on January 8, 2016* -
## cHEM

It is found that 1.431 g of element X contains 7.509 × 1021 atoms. The atomic mass of X is?

*asked on March 14, 2013* -
## Calculus

Which of the following functions grows the slowest? j(t)=1/4 ln(t^200) a(t)=t^5/2 i(t)=ln(t^100) g(t)=3t^2-t b(t)=t^4-3t+9

*asked on July 5, 2019* -
## Calculus

The function f is continuous on the open interval (-π, π). If f(x)=cos(x)-1/xsin(x) for x≠0, what is the value of f(0)?

*asked on October 19, 2016* -
## Physics Quesion

A .140 kg baseball is thrown with a velocity of 41.4 m/s. it is struck with an average force of 5000N, which results in a velocity of 37 m/s in the opposite direction. How long were the bat and ball in contact?

*asked on November 28, 2012* -
## Chemistry

For which of the following aqueous salts will electrolysis produce hydrogen gas and oxygen gas? Answered the hint in Mastering Chem & looked over the book and I still have no idea. Check all that apply: A) NiF_2(aq) B) NaF(aq) C) NiI_2(aq) D) NaI(aq) E)

*asked on November 8, 2012* -
## statistics

3. Measurements on the percentage of enrichment of 12 fuel rods used in a nuclear reactor were reported as follows; 3.11 2.88 3.08 3.01 2.84 2.86 3.04 3.09 3.08 2.89 3.12 2.98 a. Test the Hypothesis H0: µ = 2.95 versus H1: µ 0 ≠ 2.95, and draw

*asked on July 19, 2012* -
## customer service

Of the characteristics common to good listeners, which do you consider the most important in a customer service organization? Explain your answer.

*asked on August 11, 2009* -
## english

What story elements help support an author’s perspective in a text? Select all that apply. supporting ideas details** organizational structure** tone**

*asked on December 3, 2019* -
## Math-college

Can you please help with this one. Find an nth-degree polynomial function with real coefficients satisfying the given conditions. n=4 2 i and 4 i are zeros; f(-1)=85 f(x)= (Type an expression using x as the variable. Simplify your answer.)

*asked on July 24, 2017* -
## chemistry

if a solution contains 255mL of ethanol and 375 mL ofwater, what is the percent of ethanol in the soution

*asked on June 10, 2012* -
## ALGEBRA

A single card is selected from an ordinary deck of cards. The sample space is shown in the following figure. Find the following probabilities. (Enter the answers either as fractions or as decimals rounded to three places.) P(five of clubs) = Incorrect:

*asked on May 23, 2012* -
## Algebra

Tom drove to Easton from home at 50 mph. His return trip took 30 minutes longer because he ran into traffic and could only drive 45mph. How many miles is it from Tom's home to Easton? Express answer as a decimal.

*asked on February 8, 2011* -
## Physics

Suppose with 200 N of force applied horizontally to your 1500 N refrigerator that is slides across your kitchen floor at a constant velocity. What are thre friction forces on the refrigerator?

*asked on November 22, 2010* -
## Chemistry

Calculate Delta G for the spontaneous cell produced from the following: Al^3+ + 3e^- -> Al (s) Mg^2+ + 2e^- -> Mg (s) In order to solve this, you need to determine the half reactions..ie which is reduced and which is oxidized. How do I know which one is

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

A 2.118 g sample of a solid mixture containing only potassium carbonate ( MM=138.2058 g/mol ) and potassium bicarbonate ( MM=100.1154 g/mol ) is dissolved in distilled water. A volume of 30.20 mL of a 0.763 M HCl standard solution is required to titrate

*asked on October 19, 2019* -
## Math

A ship is sailing due north. At a certain point the bearing of a lighthouse is N 40∘E and the distance is 15.5. After a while, the captain notices that the bearing of the lighthouse is now S 54.9∘E. How far did the ship travel between the two

*asked on March 1, 2017* -
## Math

Nine more than the product of 9 and Malik's age Use the variable m to represent Malik's age

*asked on August 17, 2016* -
## Math Please Help Quick

The probability of winning a game is 20%. If you play 20 times, how many times should you expect to win?

*asked on June 2, 2016* -
## Math

Write a function rule that represents the sentence. C is 8 more than half of n. c=8+n/2****** c+8=n/2 c+8=1/2+n c=n/2-8

*asked on October 25, 2015* -
## Accounting

Samuels, Inc. reported net income for 2011 is $105,000. During 2011 the company had 5,000 shares of $100 par, 5% preferred stock and 20,000 of $5 par common stock outstanding. Samuels’ earnings per share for 2011 is A.$4.00 B.$5.25 C.$6.50 D.$5.00

*asked on June 9, 2013* -
## calculus

A conical water tank with vertex down has a radius of 12 feet at the top and is 23 feet high. If water flows into the tank at a rate of 20 {\rm ft}^3{\rm /min}, how fast is the depth of the water increasing when the water is 17 feet deep?

*asked on November 30, 2012* -
## physics 209

A mass m = 0.5 kg is hung from a pulley with moment of inertia I = 0.20kg⋅m2 and radius R = 10cm. There is friction in the pulley. The mass is dropped from rest, and after 2s it traveled 0.4m. What is the torque due to friction?

*asked on November 19, 2012* -
## Math

Two fire towers are 30 kilometers apart, tower A being due west of tower B. A fire is spotted from the towers, and the bearings from A and B are E 14 degrees N and W 34 degrees N, respectively. Find the distance d of the fire from the line segment AB.

*asked on May 10, 2011* -
## Business Finance

A firm has invested in corporate bonds it may engage in a financial futures contract in order to protect itself from what.

*asked on February 14, 2010* -
## Chemistry check Please

The question is: Find the following quantities the volume, in liters, of 835 g SO3 at STP My answer is: 1 mol of SO3=80g 835g/80g = 10.44 mols v = (10.44 x 8.314 x 273)/100 = 236 L Can someone tell me if I did it correct. Thanks very much.

*asked on March 9, 2009* -
## GP

two consecutive terms of a GP are the 2nd ,4th and 7th terms of an A.P respectively.find the common ration of the GP

*asked on July 27, 2016* -
## Physics

An interacting system of two objects has no external force acting on the system. The first has a mass of 2.00kg and is moving with a velocity (2.00m/s)i + (1.00m/s)j at time t=0s. The second object has a mass of 3.00kg and is moving with a velocity

*asked on November 9, 2014* -
## Algebra Word Problems

Barges from ports X and Y went to cities A and B. X sent 32 barges and Y sent 8. City A received 22 barges and B received 18 Shipping costs $220 from X to A, $300 from X to B, $400 from Y to A, and $180 from Y to B $9280 was spent How many barges went

*asked on December 19, 2009* -
## Math

Michael has a weekly food budget of $62. If he plans to budget the same amount for each of the seven days of the week what is the maximum amount he can spend on food each day?

*asked on October 30, 2019* -
## science

After an athlete has completed a 100 meter sprint, his/her breathing rate will be greatly increased, and they need time to "catch their breath." Can you identify the process that leads to a person needing to catch their breath? Ans: Hypertrophy

*asked on January 8, 2019* -
## geometry

A 4-ft vertical post casts a 20-in shadow at the same time a nearby cell phone tower casts a 115-ft shadow. How tall is the cell phone tower?

*asked on June 5, 2017* -
## English/Language Arts

Which of the following parenthetical citations is placed and punctuated correctly? A)The only casualty on Lewis and Clark's trip died from appendicitis (Davis 104). B)(Davis, 104) Kenneth Davis explains that the only casualty on Lewis and Clark's trip died

*asked on May 19, 2016* -
## economics

3. The following facts characterize the furniture industry in the United States:39 a. The industry has been very fragmented, so that few companies have the financial backing to make heavy investments in new technology and equipment. b. In 1998, only three

*asked on May 3, 2015* -
## English II B

Deana created a computer-assisted slide show. To make the slide show legible, what is one thing she needs to avoid? A)typing bullets in a small font B)adding color and effects to the font C)printing handouts on paper D)adding tables and graphics

*asked on April 3, 2014* -
## statistics

a quiz consists of 30 true or false questions. if the student guesses on each question, what is the standard deviation of the number of correct answers

*asked on April 29, 2013* -
## Physics

During the Olympic ice competition, Boris (m = 75 kg) glides at 1.8 m/s to a stationary Juliette (52 kg) and hangs on. How far will the pair slide after the “collision” if the coefficient of kinetic friction between the ice and their skates is .042? My

*asked on November 23, 2010* -
## Physics

Question: The amount of internal energy needed to raise the temperature of .25 kg of water by 0.2 degrees Celsius is 209.3 J. How fast must a 0.25 kg baseball travel in order for its kinetic energy to equal this internal energy? KE = (.5)(m)(v^2) 209.3 J =

*asked on February 15, 2010* -
## Math

Tom Schriber, a director of personnel of Management Resources, Inc., is in the process of designing a program that its customers can use in the job-finding process. Some of the activities include preparing resumés, writing letters, making appointments to

*asked on November 8, 2019* -
## Math-college

Find an nth-degree polynomial function with real coefficients satisfying the given conditions. n=4; i and 3 i are zero; f(-2)=65 f(x)= An expression using x as the variable. Simplify your answer.

*asked on July 25, 2017* -
## Math

Let r(t) be a differentiable function that is positive and increasing. The rate of increase of r^3 is equal to 12 times the rate of increase of r when r(t)=?

*asked on October 3, 2016* -
## Statistics

The coding department of a large physician clinic is interested in purchasing a software program that will edit claims before they are sent out to billing. The license fee for the software costs $34,000 per year. The software is expected to reduce the

*asked on October 30, 2013* -
## Calculus

A car leaves an intersection traveling west. Its position 5 sec later is 22 ft from the intersection. At the same time, another car leaves the same intersection heading north so that its position 5 sec later is 27 ft from the intersection. If the speed of

*asked on June 13, 2013* -
## Physics

A 5000 kg African elephant has a resting metabolic rate of 2500 W. On a hot day, the elephant's environment is likely to be nearly the same temperature as the animal itself, so cooling by radiation is not effective. The only plausible way to keep cool is

*asked on January 3, 2013* -
## algebra

3 times the difference of 7 and d

*asked on September 6, 2010* -
## General Physics

During heavy rain, a section of a mountainside measuring 2.5 km horizontally, 0.80 km up along the slope, and 2.0m deep slips into a valley in a mud slide. Assume that the mud ends up uniformly distributed over a surface area of the valley measuring 0.40km

*asked on August 21, 2010* -
## Algebra 1

Write an equation for for each translation of y=|x| 1. left 2 units y = |x| consists of two 45 degree curves joined at the origin: y = x for x>0, and y = -x for x < 0. To move the curves to the left 2 units, you want the sign of the term inside the

*asked on January 7, 2007* -
## math

2x + 3y = 78 How do i solve for x and y? 2x=78 78/2=39 so x=39 3y=78 78/3=26 so y=26 Can't be, because 2(39)+ 3(26) does not equl 78 You need TWO equations when you have TWO variables, such as x and y. It can't be done with one equation. BUT, you say, what

*asked on November 3, 2006* -
## french

write a letter in french to your penpal inviting him or her to your birthday party

*asked on August 11, 2019* -
## Math

The equation xy-1=x+y^2 defines a function y=f(x) in a neighborhood of (-1,0). Determine f(-1), fx(-1), and fxx(-1) and the second -taylor polynomial t2 (x) based around x=-1

*asked on April 24, 2019* -
## Math

Help! I need the work and how to check it too! Victoria and Georgetown are 36.2 mi from each other. How far apart would the cities be on a map that has a scale of 0.9 in: 10.5 mi?

*asked on April 13, 2018* -
## American Gov.

Which of the following does the free exercise clause of the first amendment protect? a. Teacher-led prayers in schools b. attending church c. the establishment of a state religion d. nurses reading the Bible to patients in a public hospital. My answer is

*asked on November 2, 2016* -
## HVAC

A gas is compressed inside a compressors cylinder. When the piston is at its bottom dead center , the gas is initially at 10 psig , 65 degree and 10.5 in. After compression and when the piston is at top dead center the gas is 180 degree and occupies 1.5

*asked on November 19, 2015* -
## ALGEBRA

Assume that a dart is randomly thrown at the dartboard shown here and strikes the board every time. The payoffs are listed on the board. How much should you be willing to pay for the opportunity to play this game? (Give your answer to the nearest cent.)

*asked on June 3, 2012* -
## statistics

The U.S. Department of Agriculture claims that the mean consumption of coffee by the person in the United States is 24.2 gallons per year. A random sample of 120 people in the United States shows that the mean coffee consumption is 23.5 gallons per year

*asked on April 2, 2012* -
## Physics

A spring is hung from the ceiling. When a coffee mug is attached to its end, it stretches 3.0 cm before reaching its new equilibrium length. The block is then pulled down slightly and released. What is the frequency of oscillation?

*asked on November 30, 2010* -
## science

(a) Find the concentration of H+, HCO3 - and CO3 2-, in a 0.01M solution of carbonic acid if the pH of this is 4.18. Ka1(H2CO3)=4.45 10–7 andKa2 =4.69 10–11 (b).Calculate the pH at the equivalence point of the titration between 0.1M CH3- COOH ( 25 ml)

*asked on April 16, 2019* -
## Algebra

If a and b are integers such that a^2− b^2 = 100, what is the greatest possible value of a?

*asked on October 8, 2018* -
## Math

The toco toucan, the largest member of the toucan family, possesses the largest beak relative to body size of all birds. This exaggerated feature has received various interpretations, such as being a refined adaptation for feeding. However, the large

*asked on February 8, 2018* -
## Physics

An arrow slows down from 43 m/s to 28 m/s as it passes through an apple. If the 493 g apple was originally at rest and sped up to 0.44, what must be the mass of the arrow?

*asked on January 23, 2018*