# Carl

Most popular questions and responses by Carl-
## Social Studies

How did the role of the church in education change over time? A. Universities changed from being independent to being part of the church. B. Priests became the only teachers at universities. C. Schools began to provide education beyond religious

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

The average length of the eight words Betty was asked to spell was 9 letters. The first seven words had the following lengths: 8 letters, 9 letters, 6 letters, 10 letters, 7 letters, 9 letters, and 11 letters. What was the length of the eighth word?

*asked on April 21, 2018* -
## Math

Can someone please explain to me how to solve this: Simplify 6P2. A) 30 B) 15 C) 12 D) 720

*asked on April 23, 2015* -
## stat

for randomly selected adults, IQ scores are normally distributed with a standard deviation of 15. the scores of 14 randomly selected college students are listed below. use a 0.10 significance level to test the claim that the standard deviation of IQ scores

*asked on May 14, 2012* -
## math

in triangle ABC, AB=6, BC=12 AND AC=X. Which of the following cannot be a value of x? a. 6 b.7 c.8 d.9 e.10

*asked on September 21, 2013* -
## Dynamics

A boy running a foot race rounds a flat curve of 50 ft radius. If he runs at rate of 15 mph, at what angle with the vertical will be inclined his body? A.) 16.75° B.) 13.67° C.) 76° show solution step by step thanks

*asked on July 14, 2018* -
## Chemistry

How does the three dimensional structure of SP3 bonds of Carbon, Nitrogen, Oxygen and Fluorine cause them to form polar or non-polar molecules? The answer must include a 3d diagram of the molecules, and a discussion of the effect of their electron

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

A 12-foot ladder is leaning against the outside wall of a building. The angle of the ladder with the ground is 75 degrees. The ladder is moved so that the base of the ladder is 5.8 feet from the wall. Determine the angle created by the ladder and the

*asked on December 8, 2017* -
## Maths

The sides of the equilateral triangle is 3x+2,2y-x and y+3 find x and y.and the perimeter of the triangle

*asked on June 1, 2018* -
## Algebra

I have a problem, which requires I solve the following system of linear inequality graphically. my textbook is vague and does not provide online examples or instruction to assist me withinfo to work the problem. Please help? Thank you. 3x - y is lessor

*asked on January 24, 2008* -
## Dynamics

A stone has an initial velocity of 100 fps up to the right at 30 degrees with the horizontal. The components of the acceleration are constant at ax=-4 fps^2 and ay=-20 fps^2. Compute the horizontal distance covered until the stone reaches the point 60 ft

*asked on July 14, 2018* -
## Physics

Tectonic plates are large segments of the Earth's crust that move slowly. Suppose that one such plate has an average speed of 7.5 cm/year. a)What distance does it move in 1 s at this speed? b)What is its speed in kilometers per million years?

*asked on August 27, 2018* -
## math

William is traveling at a rate of 75 miles per hour. How fast is William traveling in feet per second?

*asked on December 4, 2017* -
## English

Which of the following was valued during the Romantic period? logic individualism balance restraint

*asked on September 23, 2015* -
## Trig

Which trigonometric function can equal or be greater than 1.000? A Sine B Cosine C Tangent D none of the above

*asked on December 13, 2011* -
## Physics

Two objects are moving in the xy-plane. No external forces are acting on the objects. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. Some

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

Randall wants to mix 57 lbs of nuts worth $1 per lb with some nuts worth $6 per lb to make a mixture worth $5 per lb. how many lbs of $6 nuts must he use?

*asked on May 20, 2016* -
## Physics

Two objects are moving in the xy-plane. Object A has a mass of 3.2 kg and has a velocity of Va= (2.3 m/s)i + (4.2m/s)j and object B has a mass of 2.9 kg and has a velocity of Vb= (-1.8m/s)i + (2.7m/s)j. What is the total momentum of the system? (should I

*asked on November 9, 2014* -
## chemistry

A plastic container with a mass of 30 grams gains 1,140 joules of heat. If the temperature of the container increases 20°C, what is the specific heat of the plastic in the container?

*asked on January 4, 2012* -
## Math

Differentiate y=13x^2-5x+8

*asked on July 25, 2018* -
## English II B

A student has completed a freewriting exercise. The result is a paragraph exploring the general theme of war in a literary text. What is the next step in the writing process? 1.gathering details 2.beginning an outline 3.writing an introduction 4.narrowing

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

Evaluate the integral given below. integral(x^2+13)^2dx

*asked on September 8, 2018* -
## calculus

What is the length of the blue line labeled r in the image below? Give your answer in terms of a and b. blue line labeled r starting at the origin and ending at a point a,b b|------------| | /| | / | | / | | / | | / | | r / | | / | | / | | / | | / | | / |

*asked on September 28, 2011* -
## Math

convert feet and inches to only feet. a) 17 ft 6 in

*asked on March 8, 2019* -
## math

The median of a set of 8 consecutive even integers is 61. What is the largest integer in the set?

*asked on December 4, 2017* -
## English II B

What is the term for a magazine that is published on the computer? 1. computerized slide show 2. online publication 3. electronic portfolio 4. electronic bulletin board

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

Given the following equation: Na2O + H2O ---> 2 NaOH. How many grams of NaOH is produced from 1.20 x 10^2 grams of Na2O? How many grams of NaO2 are required to produce 1.60 x 10^2 grams of NaOH?

*asked on March 21, 2012* -
## Math

Tameron made a recipe that called 1/4 teaspoon of salt. If the recipe is doubled, how much salt is needed?

*asked on March 17, 2016* -
## Chemistry

120.0g of ice is melted, how much energy is absorbed?

*asked on February 21, 2014* -
## statistics

1. A researcher is interested in whether students who attend private high schools have higher average SAT Scores than students in the general population. A random sample of 90 students at a private high school is tested and and a mean SAT score of 1030 is

*asked on June 8, 2011* -
## Chemistry

1How would each of the following affect the accuracy of the calculated neutralizing power of antaid (too high, too low, no effect) explain a)The actacid tablet was not cut exactly in half before weighing b)The solution mixture of reacted antacid and excess

*asked on April 26, 2011* -
## Chemistry

Calculate the pH of the the solution that results from titrating 50 mL of 0.6 M NaOCl(aq) with 0.3 M HBr At 0.00 mL of HBr: At 70 mL of HBr: At 100 mL HBr: At 120 mL of HBr

*asked on March 12, 2015* -
## SPANISH

This question tells us to answer if the children bahaved good or bad from the paragraph below. Todos los niños le regalaron a Ana muchas cosas fantásticas. Había muñecas, juguetes, animales de peluche … y más cosas. Susana le regaló un oso de

*asked on February 3, 2015* -
## math calculus

Let f be twice differentiable with f(0)=12, f(3)=9, and f '(3)=4.Evaluate the integral upper limit 3 and lower integral 0 xf'' (x)dx

*asked on September 13, 2018* -
## physics

suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?

*asked on August 22, 2012* -
## Math

Michaela walked 2/5 mile to the store in 1/4 hour. What is the walking pace?

*asked on March 17, 2016* -
## chemistry

Calculate the increase of entropy in J/K when 8.6 mole of C 2 H 5 OH melts at (-114) o C and 1 atm. ΔH fus = 5.02 kJ/mol

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

please life saver i am taking a quiz now can some one help me with this pleeeeeeeaaaaaaaaassssssseeee Calculate the pH of 0.175 M phosphoric acid (H3PO4, a triprotic acid). Ka1 = 7.5 x 10-3, Ka2 = 6.2 x 10-8, and Ka3 = 4.8 x 10-13.

*asked on March 15, 2013* -
## Chemistry

A pH = 7.6 buffer is needed in the lab. This buffer is made by first dissolving 17.42 g K2HPO4 in 600 mL of water. What is the pH of this salt solution? This solution of course will be too basic becuase we only have the base of the buffer present. What

*asked on March 12, 2015* -
## English II B

Need Help Please. A student is thinking about different forums for publishing an editorial. Which of the following would be appropriate? 1.a dramatic reading 2.an anthology 3.a poetry contest 4.a school newspaper

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

Some nitrogen atoms have seven neutrons and some have eight neutrons. These two forms of nitrogen are: a. ions of each other b. phases of each other c. isotopes of each other and how exactly do you know? My book doesn't cover this at all yet its in my

*asked on February 5, 2013* -
## Math

Calculate the indicated Riemann Sums for the function g(x)=4-x^2 a)one rectangle b)two rectangles

*asked on July 24, 2018* -
## Physics, need help now

A car going 15 m/s is brought to rest in a distance of 3 m as it strikes a pile of dirt. How large a force is exerted by the seatbelts on a 90 kg passenger as the car is stopped?

*asked on October 21, 2017* -
## Physics

In DESPERATE NEED OF HELP!!! An object of mass m = 10 kg and speed v = 2 m/s collides head on with a second object of mass m = 5 kg which has a speed v = 1 m/s. The objects stick together. There are no external forces on the two objects (note the given

*asked on November 10, 2016* -
## Essex

An investment club placed $33,000 into two simple interest accounts. On one account, the annual simple interest rate is 6.5%. On the other, the annual simple interest rate is 4.5%. How much should be invested in each account so that both accounts earn the

*asked on February 16, 2016* -
## Calculus (math)

A rescue cable attached to a helicopter weighs 2 lb/ft. A 190 lb man grabs the end of the rope and is pulled from the ocean into the helicopter. How much work is done by lifting the man if the helicopter is 50 ft above to water.

*asked on April 26, 2013* -
## Physics

A cylinder with a valve at the bottom is filled with an ideal gas. The valve is now opened and some of the gas escapes slowly. The valve is then closed, after which the piston is observed to be at a lower position. Assume that the system is in thermal

*asked on November 21, 2010* -
## Calculus

Give an example of a function that is integrable on the interval [-1,1], but not continuous on [-1,1].

*asked on November 9, 2009* -
## algebra

Solve the problem. Frank can type a report in 3 hours and James takes 4 hours. How long will it take the two of them typing together?

*asked on March 20, 2009* -
## Physics

The average distance between Earth and the Sun is 1.5 ✕ 10^11 m. a) Calculate the average speed of Earth in its orbit (assumed to be circular) in meters per second. b) What is this speed in miles per hour?

*asked on August 26, 2018* -
## Chemistry

Calculate the pH of the the solution that results from titrating 50 mL of 0.6 M HCN(aq) with 0.2 M NaOH At 0.00 mL of NaOH At 85 mL of NaOH. At 150 mL NaOH. At 160 mL of NaOH

*asked on March 12, 2015* -
## chemistry

a 506g piece of copper tubing is heated to 89.5C and placed in an insulated vessel containing 159g of water at 22.8C. Assuming no loss of water and a heat capacity for the vessel of 10.0J/K, what is the final temperature of the system (c of copper = 0.387

*asked on November 15, 2008* -
## Geometry

A billiard ball bounces off the sides of a rectangular billiards table in such a way that

*asked on September 27, 2017* -
## math

a variable y varies directly as the square root of a varies x,and equals 6 when x=4 find y when x=25

*asked on November 20, 2014* -
## Chemistry II

This is what I have. Could you please correct my work? Thank you. Compute the equilibrium constant for Ni^2+ (aq) and Cd (s). reduction Ni²⁺(aq) + 2 e⁻ ⇌ Ni(s) ; E°_red = -0.25V -oxidation Cd(s) ⇌ Cd²⁺(aq) + 2 e⁻ ; E°_ox = 0.40V (negative

*asked on April 28, 2010* -
## math

Water is pumped into a cylindrical tank, standing vertically, at a decreasing rate given at time minutes r(t) = 130 - 10t ft^3/min for 0≤t≤5.The tank has radius 6 ft and is empty when t=0. Find the depth of the gasoline in the tank at t=3.

*asked on August 23, 2018* -
## programming logic

The No Interest Credit Company provides zero-interest loans to customers. (It makes a profi t by selling advertising space in its monthly statements and selling its customer lists.) Design an application that gets customer account data that includes an

*asked on December 5, 2013* -
## ENGLISH

Book april morning Describe both sides of the Boiled pudding controversy in town. What does this reveal about the town?

*asked on October 24, 2013* -
## physics

suppose the glider is initially at rest at x=0, with the spring unstretched. You then apply a constant force in the +x direction with magnitude 0.610 N to the glider. what is the glider's velocity when it has moved 0.100m?

*asked on August 19, 2012* -
## Trig

In ABC, vertex C is a right angle. Which trigonometric ratio has the same trigonometric value as Sin A? A Sin B B Cosine A C Cosine B D Tan A

*asked on December 13, 2011* -
## math

Hi, Nearly all of the energy used on earth comes originally from the sun, and that solar radiation is intercepted at 1370 Wm^-^2 at the top of the atomsphere, and that 49%of this radiation is absorbed by the earths surface. If a shallow dish containing ice

*asked on December 5, 2008* -
## Calculus

1/f = 1/p + 1/q What is the rate of change of p with respect to q if q=2 and f=4?

*asked on October 10, 2008* -
## History

How did American debates about foreign policy in the 1790s reflect the beliefs of the political parties? i think it tells poltical parties what to change ,but i need more info.

*asked on October 22, 2013* -
## Us history

Define unicameral legislature and bicameral legislature. Which type of legislature did must states have? I cant find what type of legislature did the states have

*asked on October 13, 2013* -
## Urgent Chem Help

A certain substance has a heat of vaporization of 55.30 kJ/mol. At what Kelvin temperature will the vapor pressure be 3.50 times higher than it was at 361 K?

*asked on February 10, 2013* -
## Calculus

A particle is moving along the curve y = 2 √{3 x + 7}. As the particle passes through the point (3, 8), its x-coordinate increases at a rate of 4 units per second. Find the rate of change of the distance from the particle to the origin at this instant.

*asked on October 26, 2010* -
## algebra 2

teresa and julia are among 10 students who have applied for a trip to washington DC. Two students from the group will be selected at random for the trip. What is the probability that teresa and julia will be the 2 students selected /

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

During a typical afternoon thunderstorm in the summer, an area of 76.0 km2 receives 1.42 * 10^9 gal of rain in 18 min. How many inches of rain fell during this 18 min period?

*asked on August 28, 2018* -
## Physics

A commonly used unit of mass in the English system is the pound-mass, abbreviated lbm, where 1 lbm = 0.454 kg.What is the density of gasoline in pound-mass per cubic foot? (Assume the density of gasoline is 7.40 ✕ 10^2 kg/m3.)

*asked on August 27, 2018* -
## Chemistry

What is the pH of a 150 mL buffer solution containing 0.5 M NaH2PO4 with 0.5 M K2HPO4? Determine the new pH of the solution upon the addition of 10 mL of 1.2 M strong acid to the 150 mL buffer solution above.

*asked on March 12, 2015* -
## Calc

Find the present value of $14000 due in 9 years at the given rate of interest. (a) 2%/year compounded semiannually? (b) 5%/year compounded semiannually?

*asked on April 5, 2013* -
## Art History

What may have been one cause for the relative lack of artistic production in Florence during the High Renaissance (after the death of Lorenzo), and the relative increased artistic production in Rome during this period?

*asked on February 24, 2013* -
## trig/sig figs

There are 60" in 1', 60' in 1°, and 2π radians in 360°. Convert arc-seconds into radians. KEep 6 significant figures. If someone could help and walk me through this process, it would be soooo appreciated!

*asked on January 17, 2013* -
## astronomy/conversion

There are 365.25 days in a year, 24 hours in a day, 60 minutes in an hour, and 60 seconds in a minute. Convert years into seconds. Show your work and keep 5 significant figures. Ok, so finding it is easy (multiply 24, 60, 60 and 365.25) but how does the

*asked on January 17, 2013* -
## algebra

A boat can travel 114 miles upstream in the same time that it can travel 186 miles downstream. If the speed of the current is 6 miles per hour, find the speed of the boat without a current.

*asked on August 17, 2011* -
## Physics

When a patient’s injured neck is healing, it is often desirable to prevent the weight of the head from pushing down on the neck. This can be accomplished with the system of pulleys shown in the figure. The pulleys are all small and extremely light in

*asked on February 23, 2011* -
## greek vocab.

which word did not originate from the word of the arts? 1. maudlin 2. martyr 3. character 4. colossal

*asked on November 19, 2010* -
## lit

which word did not originate from military language? 1 pioneer 2 phrase 3 salary 4 trophy

*asked on November 19, 2010* -
## Chemistry

How do I set up my equation to determine what the pH will be when the concentration of Fe^3+ is reduced to 10^-7? The previous part of the question had me find what the pH would be for the Fe(OH)3 to precipitate at 0.20 M. which i found was 1.37

*asked on November 8, 2010* -
## St. Andrews

An airplane traveling 1011 m above the ocean at 145 km/h is going to drop a box of supplies to shipwrecked victims below. (a) How many seconds before the plane is directly overhead should the box be dropped? 1 s (b) What is the horizontal distance between

*asked on October 24, 2010* -
## Chemistry II

Compute the equilibrium constant for Ni^2+ (aq) and Cd (s). I keep getting 1.7*10^-3 but apparently that is wrong. What am I doing incorrectly?

*asked on April 27, 2010* -
## math

Find a substitution w and constants k,n so that the integral x^2sqrt(1-4x^3)dx has the form ∫kw^n dw .

*asked on September 13, 2018* -
## math

A student’s score on the first four mathematics tests of the year were 80, 95, 92 and 89. What must the student score on the fifth test so that the mean score for all five tests is exactly 90?

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

If you buy a pair of shoes on sale for $48. The price is discounted 25% and the sales tax is 7%. Which of the follwoing statements would be true? Answer choices 1. The final price would be lower if you add the 7% sales tax first and take the 25% discount

*asked on December 4, 2017* -
## calculus

You have been hired by a farmer to design a fenced-in rectangular enclosure for emus. The emus will require 720 square feet of area in which to roam, and the fence will cost 20 dollars per foot. The rectangular area will adjoin an existing wall, so a fence

*asked on November 17, 2015* -
## chemistry

The power of the equation ΔG° = –RT ln(K) is that K can be determined from tabulated values of ΔG°f. Use the tabulated values of the Gibb's energy to determine K for the reaction, 2AB(l) ↔ 2A(g) + B2(g), at 298K. (R=8.314 J/K mol or R=0.008314 kJ/K

*asked on March 15, 2015* -
## Physics

A glass block has a refractive index of 1.49. What is the critical angle for the block?

*asked on November 18, 2014* -
## Geometry

A swimming pool is to be constructed in the space of partially overlapping identical circles. Each of the circles has a radius of 9 m, and each passes through the center of the other. Find the area of the swimming pool.

*asked on September 28, 2014* -
## Physics

A 2050 kg truck is traveling east through an intersection at 2.3 m/s when it is hit simultaneously from the side and the rear. (Some people have all the luck!) One car is a 1200 kg compact traveling north at 4.5 m/s. The other is a 1600 kg midsize

*asked on March 9, 2014* -
## physics-can anyone solve this please

3. A positive helium ion He+ is released from rest at the surface of a +1000 V flat electrode. It travels in the +x-direction (in vacuum) across a 1 mm gap, passes through a small hole in a +0 V electrode that is parallel to the first one, and enters a

*asked on November 23, 2013* -
## Statistics

Suppose that A and B are events defined on a common sample space and that the following probabilities are known. Find P(A or B). (Give your answer correct to two decimal places.) P(A) = 0.34, P(B) = 0.41, P(A | B) = 0.2

*asked on June 8, 2013* -
## chem 126

Phenolphthalein is a commonly used indicator that is colorless in the acidic form (pH < 8.3) and pink in the basic form (pH > 10.0). It is a weak acid with a pKa of 8.7. What is the ratio of the conjugate base concentration to the acid concentration, that

*asked on March 15, 2013* -
## physics

water leaves a hose at a rate of 1.5kg/s with a speed of 20m/s and is aimed at the side of a car, which stops it (splashing back is ignored). what is the force exerted by the water on the car?

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

Prove: sin(x–y)sin(x+y)=sin^2(x)–sin^2(y)

*asked on March 26, 2012* -
## algebra

Does the function y = 2^x ever cross the x-axis? Explain why or why not

*asked on August 17, 2011* -
## statistics

2. A teacher wants to investigate whether there is a difference between male and female students in the amount of time they spend studying for statistics. The table below shows the amount of time students spend studying statistics each week. The amounts of

*asked on June 15, 2011* -
## statistics

2. A teacher wants to investigate whether there is a difference between male and female students in the amount of time they spend studying for statistics. The table below shows the amount of time students spend studying statistics each week. The amounts of

*asked on June 15, 2011* -
## Math 11th Grade

Use Demoivre's Theorem to find the fourth roots of -16. Leave the four roots in trigonometric form. How the heck do i do this?

*asked on April 3, 2011* -
## Chemistry

What is the pH of a 0.94 M solution of HBrO that is also 0.59 M in magnesium hypobromite, the salt of it's conjugate base? The Ka for HBrO = 2.8 X 10-9.

*asked on February 23, 2011* -
## Math

write a formula that gives you the number of regions formed when x points are placed on a circle and all possible chords are drawn. ex. 2pts has 2 regions, 3pts has 4 regions, 5pts has 17 regions

*asked on January 6, 2011*