# riley

Popular questions and responses by riley-
## Math

Which of the following transformations will never produce a congruent figure? A. rotation B. reflection C. translation D. dilation

*asked on May 22, 2014* -
## Math

On the spinner below, what is P(odd) The numbers on the spinner are 13543256 Answers A. 5/8 B. 5/3 C. 1/2

*asked on May 25, 2017* -
## English

I need some help with the answers to these questions, (mainly to see if I'm correct, where I'm wrong and WHY I'm wrong) 1. What is the verb mood of the sentence below? Wear your coat when you are in the school indicative mood imperative mood ***my answer

*asked on January 21, 2016* -
## Calc

A beach ball is deflating at a constant rate of 10 cubic centimeters per second. When the volume of the ball is 256/3(pi) cubic centimeters, what is the rate of change of the surface area? (S=4(pi)r^2 and V=4/3(pi)r^3)

*asked on December 22, 2014* -
## Algebra

whats the answers to the "why are mr. and mrs. number so happy

*asked on September 22, 2016* -
## math

On a centimeter dot grid, draw all possible rectangles with a perimeter of 14 cm and sides whose lengths are whole centimeters.

*asked on April 1, 2015* -
## Chemistry

Is the solvation of borax in water an exothermic or endothermic process? i am thinking the it is endothermic...is that right?

*asked on April 7, 2008* -
## Algebra Help me Please

Someone please help me with this!!! Ray and Kelsey have summer internships at an engineering firm. As part of their internship, they get to assist in the planning of a brand new roller coaster. For this assignment, you help Ray and Kelsey as they tackle

*asked on April 26, 2016* -
## Algebra 2 (Math)

What is the vertex form of the equation? y = -x^2 + 12x - 4. I have no clue how to do this.

*asked on December 14, 2015* -
## English

24. Your responses include the following to receive the points in parentheses: ~ Respond in one or two paragraphs. Answer is written in complete sentences. Write one or two paragraphs to answer the question below. Include at least two supporting details or

*asked on October 25, 2018* -
## physics

Two boxes are connected by a cord running over a pulley. Box A is on a table and Box B is hanging off of the pulley. The system is released from rest and Box B drops a distance D. What is the word done by gravity on box B?

*asked on June 12, 2017* -
## Science

I need an acrostic poem for the word waves.

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

Lydia wrote 4.5 pages on her science report in 1 hr.What was her writing rate in pages per minute?

*asked on January 12, 2016* -
## physics

Two ice skaters have masses m1 and m2 and are initially stationary. Their skates are identical. They push against one another, as in Figure 7.10, and move in opposite directions with different speeds. While they are pushing against each other, any kinetic

*asked on October 15, 2011* -
## chemistry

The "Chemistry in Focus" segment A Magnetic Moment discusses the ability to levitate a frog in a magnetic field because electrons, when sensing a strong magnetic field, respond by opposing it. This is called diamagnetism. Atoms that are diamagnetic have

*asked on October 12, 2010* -
## Math

1)Let AB be the directed line segment beginning at point A(1 , 1) and ending at point B(-4 , 6). Find the point P on the line segment that partitions the line segment into the segments AP and PB at a ratio of 5:1. A)(-3 1/6,5 1/6) B)(1/6,1 5/6)

*asked on May 22, 2014* -
## Calculus-Applied Optimization Quiz Problem

A rancher wants to fence in a rectangular area of 23000 square feet in a field and then divide the region in half with a fence down the middle parallel to one side. What is the smallest length of fencing that will be required to do this?

*asked on October 31, 2013* -
## Physics

Two charges 10uC (point A) and -10uC (point B) are placed 10cm from each other. Find the electric field at a point P perpendicular bisector of AB at a distance 12cm from the middle. Can someone get me started on this one? I'd appreciate any help. Thanks

*asked on January 31, 2008* -
## c programming

a student designed a program to accept the age of an employee and then compute the employees retirement year and display the same in a statement on the screen required. a) write out the pseudo-code for the program above b) write the algorithm, c) flowchart

*asked on October 14, 2014* -
## CHEMISTRY

Given that the specific heat capacities of ice and steam are 2.06 J/g°C and 2.03 J/g°C, the molar heats of fusion and vaporization for water are 6.02 kJ/mol and 40.6 kJ/mol, respectively, and the specific heat capacity of water is 4.18 J/g°C, calculate

*asked on November 2, 2010* -
## Stats

The workers union at a certain university is quite strong. About 94% of all workers employed by the university belong to the workers union. Recently, the workers went on strike and now a local TV station plans to interview a sample of 20 workers ,chosen at

*asked on October 1, 2016* -
## Math

Graph the system of inequalities presented here on your own paper, then use your graph to answer the following questions: y > 3x + 10 y is less than negative 3 over 4 times x minus 1 Part A: Describe the graph of the system, including shading and the types

*asked on December 19, 2015* -
## algebra

A wire 20 cm long is cut into two pieces. The longer piece is 4 cm longer than the shorter piece.

*asked on October 5, 2016* -
## Language Arts

Why, who makes much of a miracle? As to me I know of nothing else but miracles, Whether I walk the streets of Manhattan, Or dart my sight over the roofs of houses toward the sky, Or wade with naked feet along the beach just in the edge of the water, Or

*asked on February 27, 2016* -
## physics

Two books are stacked on top of each other. Book 1 is on top of Book 2. Book 1 has a string attached to it. The string is connected to the wall. The wall is to the left of the stacked Books. Book 2 is pulled to the right with a force F big enough to move

*asked on June 4, 2017* -
## physics

A water slide is constructed so that swimmers, starting from rest at the top of the slide, leave the end of the slide traveling horizontally. As the drawing shows, one person hits the water 5.00 m from the end of the slide in a time of 0.386 s after

*asked on October 10, 2011* -
## chemistry

Consider the following double displacement reactions. For each reaction, complete and balance the equation and give the net ionic equation. NH4Cl(aq)+Ca(NO3)2(aq) -> NH4(NO3)2+CaCl the second half of the equation is what I had done but I think its not

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

The diameter and the slant height of a cone are both 24 cm. Find the radius of the largest sphere that can be placed inside the cone. (The sphere is therefore tangent to the base of the cone.) The sphere occupies a certain percentage of the cone’s

*asked on February 13, 2017* -
## Chemistry

What is the net ionic equation for this reaction? 3CuCl2(aq) + 2K3PO4(aq) = Cu3(PO4)2(s) + 6KCl(aq)

*asked on October 8, 2019* -
## Science

1 Why is the area around the divergent boundary also known as the sea floor spreading 2 Features can be found around the sea floor spreading zone that indicates the plates are moving apart 3 Why do most seafloor spreading zones usually occur under water 4

*asked on January 6, 2019* -
## physics

An archer shoots a 54.6 g arrow horizontally at a target 14.0 m away. The arrow is 18.0 inches long. The 54.6 g arrow is aimed directly at the center of the target, but it hits 60.0 cm lower. What was the initial speed of the arrow? (Neglect air

*asked on September 5, 2013* -
## physics

A water tower sits on top of a hill and supplies water to citizens below. The difference in pressure between the water tower and the Dailey's house is 1.1x10^5 Pa, while the difference in pressure between the tower and the Stearns' house is 3.2x10^5 Pa.

*asked on July 27, 2010* -
## Math

Use experimental probability to make a prediction. John made 35 free throws and missed 15. Predict the number of free throws he will make in the next 100 tries. A. 70 B. 85 C. 55 D. 45

*asked on May 2, 2014* -
## Pre-Calculus

If sin(theta)=15/17 and cos(beta)=(-5/13 (both theta and beta are in quadrant II) find tan(theta+beta)

*asked on November 14, 2010* -
## Physics

A skater of mass 80.5 kg initially moves in a straight line at a speed of 4.90 m/s. The skater approaches a child of mass 41.0 kg, whom he lifts on his shoulders. Assuming there are no external horizontal forces, what is the skater's final velocity?

*asked on October 22, 2018* -
## Physics

A hockey stick applies a constant force over a distance of 0.127 m to an initially stationary puck, of mass 152 g. The puck moves with a speed of 51.0 m/s. With what force did the hockey stick strike the puck?

*asked on January 12, 2012* -
## stats

Anita's a fast food chain specializing in hotdogs and garlic fries, keeps track of the proportion of its customers who decide to eat in the restaurant so it can make decisions reguarding possible construction of the in-store play areas.the attendance of

*asked on October 1, 2016* -
## Chemistry

In the reaction Ca → Ca2+ + 2e-, Ca is __________. A:reduced because it gains electrons B:reduced because it loses electrons C:oxidized because it gains electrons D:oxidized because it loses electrons

*asked on May 24, 2019* -
## physics

A 0.25 kg skeet (clay target) is fired at an angle of 30 degrees to the horizon with a speed of 25 m/s. When it reaches the maximum height, it is hit from below by a 15 g pellet travelling upward at a speed of 200 m/s. The pellet is embedded in the skeet.

*asked on August 19, 2010* -
## Physics

Show by algebraic reasoning that your gravitational acceleratoin toward an object of mass M a distance d away is a = GM/d squared and therefore doesn't depend on your mass.

*asked on October 14, 2009* -
## Finance

You have been hired as a consultant for Pristine Urban-Tech Zither, Inc. (PUTZ), manufacturers of fine zithers. The market for zithers is growing quickly. The company bought some land three years ago for $1.30 million in anticipation of using it as a toxic

*asked on October 26, 2016* -
## Science

1 Why is the area around the convergent boundary also known as The zone of subduction 2 what features can be found around the zone of subduction that indicates the plates are smashing together 3why does one plate sink under another 4 what part of the

*asked on January 6, 2019* -
## physics

When jumping straight down, you can be seriously injured if you land stiff-legged. One way to avoid injury is to bend your knees upon landing to reduce the force of the impact. A 79.1 kg man just before contact with the ground has a speed of 6.27 m/s. In a

*asked on February 23, 2012* -
## Math

This is my first time using this site so this is a test to see if anyone will actually help and how long it takes for a response so plz when you see this write I saw this plz

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

A 540 g block is released from rest at height h0 above a vertical spring with spring constant k = 320 N/m and negligible mass. The block sticks to the spring and momentarily stops after compressing the spring 19.8 cm. How much work is done (a) by the block

*asked on March 10, 2014* -
## Chemistry

is Fe3O4 + 4H2 = 3Fe + 4H2O spontaneous at 298 K? Delta H system= 149.8 kj/mol Delta S system= 610.0 kj/mol

*asked on March 5, 2013* -
## physics

Bradley, working in his 23 C kitchen, is cooking himself a crepe in an iron skillet that has a circular bottom with a diameter of .30 m. How hot must the skillet be in order for Bradley to make a .07103 m^2 crepe that just fills the bottom of the pan?

*asked on July 27, 2010* -
## Civics

Explain how federal income taxes support the economy and benefit the common good. I have to have at least one well-developed paragraph, and this question is worth 10 points which is why I need help!!

*asked on June 11, 2014* -
## physics

The drawing shows a human figure approximately in a sitting position. For the purposes of this problem, there are three parts to the figure, and the center of mass of each one is shown in the drawing. These parts are: (1) the torso, neck, and head (total

*asked on October 15, 2011* -
## Social Studies/ World History

Hammurabi’s Code Hammurabi’s Code listed 282 laws dealing with a variety of subjects. A few examples of these laws are listed below. 196. If a man put out the eye of another man, his eye shall be put out. 197. If he breaks another man’s bone, his

*asked on August 16, 2010* -
## physics

Lucy is going skin diving to see coral off the coast of Mexico in sea water with a density of 1025 kg/m^3. If she were to hold her breath as she ascends to the waters surface a)by how many times would the volume of her lungs change assuming the water

*asked on July 27, 2010* -
## calculus

The demand function for a certain make of replacement cartridges for a water purifier is given by the following equation where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. p=-0.01x^2-0.3x+19

*asked on April 10, 2013* -
## physics

The drawing shows a human figure approximately in a sitting position. For the purposes of this problem, there are three parts to the figure, and the center of mass of each one is shown in the drawing. These parts are: (1) the torso, neck, and head (total

*asked on October 16, 2011* -
## Chemistry

I'm doing chemical equilibrium, and there's a question in my lecture notes. Can someone check my answers and tell me if i'm right or wrong? Thanks! The Kc expression for this reversible reaction: 3Fe(s) + 4H2O (g) -->

*asked on September 10, 2010* -
## Social Studies/ World History

“There are two extremes. . . which he who has given up the world ought to avoid. What are these two extremes? A life given to pleasures, devoted to pleasures and lusts: this is degrading, sensual, vulgar, ignoble, and profitless; and a life given to

*asked on August 16, 2010* -
## College Stats

A machine fills 64 ounce detergent jugs. It is known that the net amount of detergent poured into each jug has a normal distribution with a standard deviation of 0.35 ounces. The inspector wants to adjust the machine such that at least 95% of the jugs have

*asked on October 28, 2008* -
## Spanish Check

Vamos a... Form sentences using the following information. Use ir a + infinitive in each sentence to express what the subject is going to do. Follow the model closely. 1.Leonardo / trabajar / las tres de la tarde -Leonardo está estudia las tres de la

*asked on October 4, 2012* -
## chemistry

A saturated solution is prepared by dissolving 3.2 g of a salt in 9.10 g of water to yield a saturated solution. What is the solubility of the salt (in g salt/100g of H2O)?

*asked on March 18, 2012* -
## History

What was the primary purpose of the Constitutional convention of 1787? A. Outlaw slavery In both the north and south B. Place taxes on the imports and exports C. Revise the articles of confederation D. Reduce the power of the federal government

*asked on October 17, 2016* -
## STATISTICS

A study of college football games shows that the number of holding penalties assessed has a mean of penalties per game and a standard deviation of penalties per game. What is the probability that, for a sample of college games to be played next week, the

*asked on October 24, 2016* -
## English

Read the following passage by Picoult and identify the metaphor. Quote the metaphor in your response and explain what makes it fit the definition of metaphor. “My mother moves so fast I do not even see it coming. But she slaps my face hard enough to make

*asked on February 25, 2012* -
## math 11

Is it possible for a rectangle with a perimeter of 44cm to have the area of 125cm^2 ? If so, find the dimensions of the rectangle. Figure out the equation in general form.

*asked on October 21, 2010* -
## calculus

Find all points on the curve x^2y^2+xy=2 where the slope of tangent line is -1. This is what I got. x^2y^2+xy=2 x^2*2ydy/dx + 2x*y^2 + x*dy/dx + y =0 dy/dx(2yx^2+x)= -2xy^2-y dy/dx = (-2xy^2-y)/(x+2yx^2) how do I finish from here? I need to know where the

*asked on April 2, 2009* -
## physics

On planet Earth, a pendulum has a length of L and a period of T .On planet Mars, the pendulum has a length of 4L and period of 5T.what is the acceleration due to gravity ?

*asked on July 30, 2017* -
## Algebra 2

Write the equation of a trend line. {(-10, 3), (-5, 1), (-1, -4), (3, -7), (12, -12)} How do I do this problem?

*asked on February 4, 2016* -
## math

Charlie can type faster than any of his classmates. He took a test that showed he can type 700 words in 5 minutes . How many words can he type per minute

*asked on December 6, 2015* -
## exam study math guide CRUICAL

The average of Anne's, Sara's, and Julie's test score is 72. Julie scored 100 and Anne scored 10 points higher than Sara.what were annes and saras scores?

*asked on December 11, 2010* -
## Economics

Suppose you take a loan of $1000 today at a compound interest of 10 percent. Calculate the loan amount at the end of year 2. Thanks!!!

*asked on December 4, 2019* -
## Chemistry

The theoretical yield of a reaction is the amount of product obtained if the limiting reactant is completely converted to product. Consider the reaction: P4(s) + 6 Cl2(g) → 4 PCl3(l) If 19.47 g P4 is mixed with 6.85 g Cl2, calculate the theoretical yield

*asked on November 26, 2015* -
## Chemistry

AgNO3 + NaCl -> AgCl + NaNO3 Which statement about this reaction is FALSE? A. This is one kind of metathesis reaction, where molecules exchange atoms. B. This reaction produces a gas. C. This is a precipitation reaction. D. The equation is balanced.

*asked on April 17, 2017* -
## Chemistry

A sample of Chlorine occupies 8.50 L at 80.0 C and 740 mm Hg. What volume will Chlorine occupy at STP?

*asked on November 27, 2016* -
## physics

A block of mass m is pressed against a vertical wall with a force F acting at an angle theta. What are the maximum and minimum forces of F that can be applied and still have the block remain stationary?

*asked on June 5, 2017* -
## Chemistry

In a constant‑pressure calorimeter, 75.0mL of 0.950 M H2SO4 was added to 75.0 mL of 0.250 M NaOH. The reaction caused the temperature of the solution to rise from 23.24∘C to 24.94∘C. If the solution has the same density and specific heat as water

*asked on February 3, 2020* -
## Climate

Which of the following statements about climate is FALSE? A. Deserts usually occur at very low altitudes. B. Temperatures usually decrease with altitude. C. Coastal temperatures are usually cooler than inland temperatures. D. The southern hemisphere is

*asked on March 6, 2017* -
## History

In what present day states did the Dutch establish new Netherland?

*asked on January 28, 2015* -
## programming

I am having trouble writing this program for java. can anybody help write a program that prints the letter X composed of asterisk.

*asked on February 5, 2010* -
## Math

A set of stairs has a rise of 6 inches and a run of 9 inches. The building safety code says the stairs should rise at an angle of between 30 degrees and 35 degrees. Does this set of stairs meet the safety regulations? Justify your answer by showing

*asked on May 5, 2017* -
## Physics

A 2.5 kg block of ice at a temperature of 0C and an initial speed of 5.7 m/s slides across a level floor. If 3.3*10^5 J are required to melt 1.0 kg of ice, how much ice melts, assuming that the initial kinetic energy of the ice block id entirely converted

*asked on February 20, 2012* -
## Physics

An airline pilot pulls her 12.0 kg rollaboard suitcase along the ground with a force of 25.0 N for 10.0 meters. The handle she pulls on makes an angle of 42.5 degrees with the horizontal. How much work does she do over the ten-meter distance? Tried doing:

*asked on January 12, 2012* -
## physics

A tick is standing on a turntable at distance r from the centre. The static friction coefficient between the tick and table is us. The table is spinning at a constant angular frequency of w a) what values of r is the bug most likely to slip at? small or

*asked on July 11, 2017* -
## Algebra 1 Solving Systems Using Elimination

What is the solution of the system? y = -3x 3x + 2y = 6 (2, 6) (-1, 3) (-2, 6) (1.5, -4.5)

*asked on December 28, 2015* -
## us history

The most useful indicator of the degree of democracy reached by a particular society is whether it has a... formal method whereby people can effect changes in government policy, system of government checks and balances, two-house legislature, system of

*asked on October 9, 2007* -
## STATISTICS

Suppose that a researcher is interested in estimating the mean systolic blood pressure, , of executives of major corporations. He plans to use the blood pressures of a random sample of executives of major corporations to estimate . Assuming that the

*asked on October 24, 2016* -
## math

Scientists randomly caught 30 fruit bats at an orchard. They tagged the fruit bats and then released them. Several weeks later, they captured 20 fruit bats at the same location. They found that 4 of those fruit bats had tags. Assume the population of fruit

*asked on December 14, 2015* -
## math

I'm doing a unit on volume and surface area. So there's a diagram that shows a fish tank after a container of water is poured into the tank. How many containers of water are needed to fill the tank? What is the formula to finding this?

*asked on May 10, 2012* -
## physics please help

A 690 kg elevator starts from rest. It moves upward for 2.56 s with constant acceleration until it reaches its cruising speed, 1.84 m/s. What is the average power of the elevator motor during this period? What is the power of the elevator motor during an

*asked on February 20, 2012* -
## chemistry

What is the energy of green light with a wavelength of 5.50x10^-7m?

*asked on October 11, 2010* -
## Mathematics

A right circular cone of base radius r cm and height h cm fits exactly into a sphere of internal radius 12cm. a)Express r in terms of h. b)If the volume of the cone is Vcm cube, show that V=8¶h^2 - 1/3¶h^3 c)Find the value of r for which V has a turning

*asked on June 19, 2009* -
## Biology

In biology, would effectiveness and neutralizing mean the same thing for anti-acids? Like if alka-seltzer was more effective than tums, would it make it a better neutralizer?

*asked on September 3, 2019* -
## Algbra 1

x varies directly with y and z x=1200,when y=20 and z=30. Find x when y=10 and z=20

*asked on May 11, 2018* -
## physics

IP A jogger runs with a speed of 3.10{\rm m/s} in a direction 25.0{^\circ} above the x axis. Find the x and y components of the jogger's velocity.

*asked on September 11, 2012* -
## Math

There are 7 girls on a bus. Each girl is carrying 7 backpacks. In each backpack, there are 7 big cats. For each big cat, there is 7 little cats. How many legs are there? My answer was 10,990 legs. My teacher said it wasn't right, although it was very

*asked on January 5, 2012* -
## Physics

A bar with a mass of 20kg with a length of 30m is being lifted by a string and makes an angle of 55 degrees. The string is attached to the ceiling vertically. What is the tension on the string? What is the normal force given by the bar on the string what

*asked on July 16, 2017* -
## Chemistry

For the following reaction, the equilibrium constant KC = 97.0 at 900 K. If the initial concentrations of NH3 and H2S are both 0.20 M, what is the equilibrium concentration of H2S? H2S (g) + NH3 (g) ---> NH4HS (s)

*asked on March 18, 2012* -
## Physics

Two forces are applied to a car in an effort to move it, as shown in the following figure (cannot attach picture), where F1 = 416 N, 10 degrees to the left of north and F2 = 356 N, 30 degrees to the right of north. What is the sum of these two forces

*asked on September 12, 2014* -
## physical science help please!

If a sample emits 1000 counts per second when the detector is 1 meter from the sample, how many counts per second would be observed when the detector is 2 meters from the sample?

*asked on December 5, 2012* -
## Math help

*asked on December 5, 2010* -
## calculus

I am suposed to apply L'Hospitals rule to solve. I can't seem to solve it tho. could someone explain the steps to me? Thanks! the limit as x approaches infinity of: xe^(1/x)-x This is what I got so far: xe^(1/x)-x x(e^(1/x)-1) e^(1/x)-1/(1/x) Now its in

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

Find the cubic function f(x)=ax^3+bx^2+cx+d that has a local max value of 3 at -2 and a local min values of 0 at 1. I have no idea how to solve this. Could you please give step by step answers and explanations for the steps. Thanks!

*asked on April 7, 2009* -
## Chemistry

When CO2(g) (0.118 mol/L) and H2(g) (3.90 mol) in a 33.0 L reaction vessel at 980K are allowed to come to equilibrium the mixture contains 0.0853 mol/L of H20(g). What concentration (mol/L) of CO2(g) reacted? CO2(g) + H2(g) CO(g) + H2O(g)

*asked on April 10, 2008*