# Maddie

Most popular questions and responses by Maddie-
## Math

Does anyone know the answer to the math riddle "Did you hear about..." the answer is 12 words and it's pg 167.

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

How do you solve system of equations and tell if they're consistant and independant,consistant and dependent,and inconsistant? If you find no solutions then the system is inconsistent. Suppose you have N variables and M equations (N larger than or equal to

*asked on July 27, 2007* -
## Equalities- SUPER confused

If a = 3/5, b = 3, c = 1, d = 5, which equality is true? A)d/a = b/c B)a/b = c/d C)b/a = c/d D)a/d = b/c How do I figure this out?

*asked on February 20, 2018* -
## MATH

The odds in favor of Carl beating his friend in a round of golf are 7 : 4. Find the probability that Carl will lose. would the answer be 7/11?

*asked on February 6, 2017* -
## math

which shapes will have an area of 24m2? choose all that apply. a. a triangle with the base of 6m and a height of 4m b. a parallelogram with a base of 48m and a height of .5m c. a trapezoid with the bases of 9m and 3m and a height of 4m d. a triangle with a

*asked on February 21, 2018* -
## math

The scatterplot shows the number of minutes spent reading (x) and the number of pages read (y) by each of seven students last night. Use the labeled points to create a linear model that predicts the number of pages that a typical student reads in x

*asked on December 15, 2016* -
## Math; Calculus

You toss a rock up vertically at an initial speed of 55 feet per second and release it at an initial height of 6 feet. The rock will remain in the air for_______ seconds. It will reach a maximum height of_______ feet after ________ seconds.

*asked on February 12, 2017* -
## Physics

You push down on a book of inertia m resting on a table with a force directed at an angle θ away from vertical. The coefficient of static friction between book and table is μs. If θ is not larger than some critical value, you cannot get the book to

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

A 1.0 mL sample of seawater is determined to contain 9.0×10-14 moles of dissolved gold. How many atoms of gold are in that volume of seawater?

*asked on October 10, 2017* -
## chemistry

how many grams of solid calcium oxide must react with excess water to liberate the same quantity of heat as does the combustion of 24.4 l of methane gas (CH4), measures ar 24.7 c and 753 torr? CaO +H2O --> Ca(OH)2 Delta H = -65.2 KJ CH4 + 2O2 --> CO2 +2H20

*asked on March 22, 2016* -
## Third Grade Math

About how much does a button weigh? 1 gram 100 grams 1 kilogram 10 kilograms Thanks!

*asked on March 14, 2011* -
## Algebra 2

Why couldn't the chicken find her egg?

*asked on February 16, 2014* -
## Algebra, math

What happened when 1000 baseballs fell from an airplane?

*asked on April 12, 2016* -
## Stats

A basketball player makes 80% of her free throws. Recently during a very close game, she shot 5 free throws near the end of the game and missed 3 of them. The fans booed. What is the probability of her missing 3 (or more) free throws out of 5? Set up and

*asked on February 8, 2015* -
## physics

Calculate the force of gravity on a 16 kg mass at Earth's surface. The mass of Earth is 6. 1024 kg, and its radius is 6.4 106 m.

*asked on January 13, 2015* -
## chemistry

The energies, E, for the first few states of an unknown element are shown here in arbitrary units. n 1 2 3 4 0 E -63 -27 -12 9 infinity A gaseous sample of this element is bombarded by photons of various energies (in these same units). Match each photon to

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

Jay rides his 2.0-kg skateboard. He is moving at speed 5.8 m/s when he pushes off the board and continues to move forward in the air at 5.4 m/s. The board now goes forward at 13 m/s. A. Determine Jay’s mass. B. Determine the change in the internal energy

*asked on February 1, 2019* -
## Literature

The civil rights movement consisted of many events, such as freedom rides and sit-ins. Some of the events, such as fires and murders, were violent and unsettling. But the killing of the four little girls in Birmingham is considered one of the most

*asked on January 17, 2015* -
## Physics A

how much work is being done a bookshelf being pulled 5 meters at an angle of 37 degrees from the horizontal? The magnitude of the component of the force that does the work is 43 Newtons

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

an airplane is flying a compass of 340 degrees at 325 mph. A wind is blowing with the bearing 300 degrees at 30 mph. Find the component form of the velocity, and find the actual ground speed and direction of the plane.

*asked on February 28, 2014* -
## Chemistry

Give the formula and charge of the oxoanion ONLY in each of the following compounds. potassium sulfite sodium perchlorate lithium phosphite magnesium hypochlorite

*asked on September 25, 2017* -
## Chemistry

1. Use the following balanced net ionic equation to determine the volume of 6.0 M HNO3 needed to react completely with 5.00 g of copper. 8H+(aq) + 2NO3-(aq) + 3Cu(s) → 2NO(g) + 4H2O(l) + 3Cu2+(aq)

*asked on October 23, 2015* -
## Math

On Tuesday, Leslie spent 47 minutes on math homework, 39 minutes on science homework, 52 minutes on English homework, and 44 minutes on history homework. How much time did Leslie spend doing her homework on Tuesday?

*asked on April 6, 2015* -
## Math

What is the product of 3y2 and 4y5?

*asked on April 23, 2010* -
## Math

anna made 400 quarts of lemonade. she poured the lemonade into the containers. each container holds 4/7 of a quart. how many containers did anna use

*asked on November 9, 2015* -
## Chem 1120

The KC for the reaction I2 --> 2I is 3.8 x 10 ^ -5 at 727 degrees C. Calculate Kc and Kp for the equilibrium of 2I -> I2 at the same conditions. I don't understand how to set up or solve this problem. I know Kc=[I]^2 / [I2] = 3.8x10^-5 for the first

*asked on July 13, 2014* -
## physics

A hallway display of energy is constructed in which several people pull on a rope that lifts a block 1.15 m. The display indicates that 1.05 J of work is done. What is the mass of the block?

*asked on January 12, 2011* -
## Math

1. What is the range of the ages shown in the stem-and-leaf plot? 3|0,2 4|1,4,4,5 5|3,5,8,9 6|2,2,2,5,6,8 7|5,5,6 A. 4 B. 6--- My answer C. 34 D. 46 What is the median of the ages shown in the stem-and-leaf plot? 58 58.5 59---- my answer 59.5 What is the

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

Calculate the pH of a buffer solution that contains 0.60 M NaH2PO4, and 0.26 M Na2HPO4.

*asked on April 14, 2013* -
## Math again sorry

A roller coaster starts from a deck at an elevation of 20 feet above the ground. On the first hill it climbs 78 feet and then drops 85 feet. On the second hill the coaster climbs 103 feet and then drops 110 feet. How far below or above the deck is the

*asked on February 20, 2018* -
## History

what was the purpose of the federal troops occupying Texas after the civil war? 1.to conduct military trials to place previous confederate officers on trial. 2.to ensure that Texas rejoined the union appropriately.****(my answer) 3.to provide training and

*asked on January 10, 2018* -
## Math

Sarah can afford $255 per month for 6 years on a car payment, what is the price of a car that she can afford at this time? Assume an annual interest rate of 8%. I do not remember how to solve for problems like this one.

*asked on March 12, 2017* -
## Math

At 6:00 A.M. the temperature was 33Â°F. By noon the temperature had increased by 10Â°F and by 3:00 P.M. it had increased another 12Â°F. If at 10:00 P.M. the temperature had decreased by 15Â°F, how much does the temperature need to rise or fall to

*asked on February 20, 2018* -
## Physics

A 41 kg child sits in a swing supported by two chains, each 1.4 m long. If the tension in each chain at the lowest point is 261 N, find the child’s speed at the lowest point. (Neglect the mass of the seat.) Find the force of the seat on the child at the

*asked on September 26, 2015* -
## math 7th grade

Ingrid mixes 3.6 pounds of almonds with some raisins to make a trail mix. She divides the trail mix into 12 equal portions. Each portion weighs 0.7 pound. How many pounds of raisins did she use to make the trail mix? Express the answer to the nearest

*asked on April 13, 2016* -
## AP Chem

1. Van't Hoff factors depend on the concentrations of the dissolved solute species. Why would a dilute solution have a Van't Hoff factor closer to the ideal value? a. because in dilute solutions solute species are less likely to bump into each other and

*asked on January 24, 2016* -
## Mathematics

Jake's car needs repairs but he is short of cash. A payday loan company charges a fee of 46 for a two week loan of 250. This is equivalent to a discounted loan with proceeds of 250 and a loan amount of 296. What is the per annum interest rate?

*asked on November 12, 2008* -
## Algebra

To solve the system of equations, which expression could be substituted for x into the first equation? 3x-5y=14 x+4y=10 a)10-4y b)4y+10 c)(1/4)x+(5/2) d)(-1/4)x+(5/2) I have another problem just like this one so if you could explain how to solve this one I

*asked on July 27, 2007* -
## science

how does the process of plucking cause erison

*asked on March 1, 2019* -
## physics

The coefficient of kinetic friction for wood on wood is o.55. The coefficient of kinetic friction for wood on wood is 0.68. For a 3.5kg wood block being pulled horizontally: a. what is the pull force needed to start the wood block moving on a wood floor?

*asked on December 10, 2016* -
## Math

Simplify. -2(3)^2 - 8 ÷ 2 + 6 A) -18 B) -16** C) -7 D) 7 Lucy is trying to find a rational number between 3/8 and and 6/7 What would help her to find this number? A)Divide 3/8 by 6/7*** B)Multiply 3/8 by 6/7 C)Convert 3/8 and 6/7 to Fractions with a

*asked on February 20, 2018* -
## Calculus

Determine whether Rolle's Theorem can be applied to f on the closed interval [a,b]. If Rolle's Theorem can be applied, find all values of c in the open interval (a,b) such that f'(x)=0. f(x) = x^(2/3) - 1 [-8,8] I plugged in both values and found out that

*asked on September 26, 2013* -
## physical science

How much heat is absorbed by a 70g iron skillet when its temperature rises from 24oC to 110oC? joules

*asked on January 1, 2017* -
## Pre calculus

Your computer supply store sells two types of laser printers. The first type, A, has a cost of $86 and you make a $45 profit on each one. The second type, B, has a cost of $130 and you make a $35 profit on each one. You expect to sell at least 100 laser

*asked on March 4, 2016* -
## Maths

A debate team of 4 is to be chosen from a class of 29 where the order in which the members of the team are chosen does not matter. There are two twin brothers in the class. How many possible ways can the team be formed which will not include any of the

*asked on March 16, 2014* -
## geometry

solve this proof: PR is congruent to DE, PT is congruent to DF, Angle R is congruent to Angle E, Angle T is congruent to Angle F.. Prove Triangle PRT is congruent to Triangle DEF

*asked on November 6, 2011* -
## Physics

A 4.0-kg block slides down an inclined plane that makes an angle of 25° with the horizontal. Starting from rest, the block slides a distance of 2.5 m in 5.4 s. Find the coefficient of kinetic friction between the block and plane.

*asked on June 27, 2016* -
## chemistry

A reaction mixture of N2O4 and NO2 absorbs the heat given off in the combustion of 6.35 L CH4 measured at 24.7 C and 812 Torr. How many moles of N2O4 can be converted to NO2 as a result? CH4 + 2O2 --> CO2 + 2H2O Delta H = -890.3 KJ N2O4 --> 2NO2 Delta H =

*asked on March 22, 2016* -
## Physics grade 11-

A car traveling at 72 km/hr hits a tree. the driver, who has a mass of 55.0 kg comes to a rest 0.10s after the impact. What is the force that acts on the driver?

*asked on December 11, 2015* -
## socials studies 9

why do you think lawyers in the land claims trials refer to the royal proclamation of 1763 more than 200 years after it was proclaimed? I do not understand this question..

*asked on November 8, 2014* -
## physics

A hallway display of energy is constructed in which several people pull on a rope that lifts a block 1.15 m. The display indicates that 1.05 J of work is done. What is the mass of the block?

*asked on January 12, 2011* -
## physics (emergency!)

How much work is required to stop an electron (m = 9.11 10-31 kg) which is moving with a speed of 1.99 106 m/s?

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

A grid shows the positions of a subway stop and your house the subway stop is located at (-3,6) and your house is located at (-7,2) what is the distance to the nearest unit between your house and the subway stop Answers 6 11 9 13

*asked on May 24, 2018* -
## Chemistry

The pH of an 0.0870 M solution of weak acid A is 2.20. The pH of an 0.0830 M solution of weak acid B is 4.07. The pH of an 0.0890 M solution of weak acid C is 5.13. Identify the three acids from among those listed below (the Ka values are listed in

*asked on April 12, 2013* -
## PHYSICS HELP

Suppose the aliens watching the show are on the surface of Mars. Mass of Mars: 6.42 x 10^23 kg Radius of Mars: 3.394 x 10^6 m Calculate; A) the weight of a 40.0 kg alien on Mars B) the weight of 40.0kg alien on earh Earth-sun distance:1.50x10^11m Mars-sun

*asked on March 26, 2015* -
## physics

Two protons are moving directly toward one another. When they are very far apart, their initial speeds are 1.5e6 m/s. What is the distance of closest approach? PLEASE HELP! im very confused.

*asked on March 15, 2009* -
## Math

The given angle is in standard position. Determine the quadrant in which the angle lies. -25° A. Quadrant III B. Quadrant II C. Quadrant IV D. Quadrant I

*asked on January 19, 2016* -
## Literature

Dr. Martin Luther King spoke at the funeral of three of the little girls killed in the Birmingham bombing. In his eulogy, he said, “The innocent blood of these little girls may well serve as a redemptive force that will bring new light to this dark

*asked on January 17, 2015* -
## Advanced algebra

The number of freshmen entering college in a certain year is 621. What type of data is 621? A. Discrete data B. categorical data C. Continuous data

*asked on August 18, 2014* -
## poetry

i need help on thinking of a acrostic poem for DOLPHIN.

*asked on May 25, 2010* -
## Science

The basic activities of life occur in the _______ nucleus DNA mitochondria cell****

*asked on April 7, 2017* -
## Math

What is the upper quartile of the data set below 25, 8, 10, 35, 5, 45, 40, 30, 20 A. 5 B. 8 C. 9 D. 10

*asked on April 5, 2017* -
## Chem

If .00840 mol is the answer to this question (Suppose that 16.41 mL of 0.0512 M NaOH were required to titrate a sample of unknown acid. How many moles of NaOH were used? ) how would I answer this: Assuming that the unknown acid sample in question 1 had a

*asked on February 8, 2017* -
## Math

1st question: Which events are not independent? You toss three coins and get one head and one tail. You choose three different ice toppings for a sundae. You draw to colored pencils without replacement and get one red and yellow. You pull a yellow marble

*asked on May 18, 2016* -
## Calculus

A box with a square base and no top is to have a volume of 32 ft3. What dimensions use the least amount of material (in other words what dimensions give minimum outside surface area)?

*asked on May 24, 2015* -
## physics

A 78 g basketball is launched at an angle of 45.4◦ and a distance of 10.1 m from the basketball goal. The ball is released at the same height (ten feet) as the basketball goal’s height. A basketball player tries to make a long jump-shot as described

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

Calculate the pH at the equivalence point when 50 mL of 0.098 M propionic acid is titrated with 0.340 M NaOH. I tried solving for the volume of NaOH and them using the total volume and then plugging it in to [H+][A-]/[HA] and used the Ka value for

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

An aqueous antifreeze solution is 31.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.039 g/cm3. Calculate the molality of the ethylene glycol.

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

How many grams of BaSO4 can dissolve in 1.5 L of a 0.010 M solution of Na2SO4? Ksp= 1.1 x 10^-10 I thought the answer was 1.1x10^-8 M then multiply by the molar mass to get the amount of grams but my answer isn't correct. PLEASE HELP!

*asked on December 4, 2010* -
## Precalculus

Water is flowing at the rate of 50 m^3/min from a conical reservoir (vertex down) of base radius 45 meters and height 6 meters. What is the water level when the reservoir has 5000 m^3 of water left in it?

*asked on August 16, 2015* -
## Math

1). How many shelves each 2 3/4 feet in length can be cut from a piece of lumber that is 15 2/3 feet long?

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

How do you write 2.536 in words? I've never seen it before. Thanks! Maddie

*asked on December 1, 2008* -
## Mathematics

Pam and Tim decide to start saving money for their daughter's college education. They open a college savings plan with a 400 initial investment and next month start to make monthly deposits of 100. If the account pays 8.00% compounded monthly, how much

*asked on November 17, 2008* -
## chemistry

Study the reaction. 2A(?) + B(g) ⇌ A2B(g) Both B and A2B are gases. When the reaction vessel is compressed, the equilibrium position does not change. What conclusion can we draw about the state of “A” from this data? A. "A" must be a gas because, if

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

If the bat emits a sound at a frequency of 80.0 kHz and hears it reflected at a frequency of 83.3 kHz while traveling at a speed of 3.9 m/s , calculate the speed of the insect. So using the doppler effect I got that 1.04=(344+3.9)/(344-vbug) This is

*asked on June 7, 2018* -
## Math

David is playing a trivia game where he gains points for correct answers and loses points for incorrect answers. At the start of round 3 his score is −1500 points. During round 3 he answered five 1000 point questions correctly and three 500 points

*asked on February 20, 2018* -
## Algebra 2

If two fair dice are rolled, what is the probability that a total showing is either even or less than eight? How would I solve this question? What are the steps? Thanks

*asked on February 6, 2017* -
## Math

Your computer supply store sells two types of laser printers. The first type, A, has a cost of $86 and you make a $45 profit on each one. The second type, B, has a cost of $130 and you make a $35 profit on each one. You expect to sell at least 100 laser

*asked on March 4, 2016* -
## Math

Are 1.6 square meters & 16 tenths square meters the same?

*asked on September 8, 2015* -
## math

You want to put $4,000 in a simple interest account. It has a 2.5% annual interest rate. How long will it take you to earn $500 in interest?

*asked on May 27, 2013* -
## Accounting

Interest on a $20000 one-year 10 percent note payable dated October 1 2007 was not recorded. The 10 percent interest is payable on the maturity date of the noteWhat is the interest income

*asked on October 14, 2008* -
## Literature

Since the time of the play's first performance, the props and set have been designed to be minimal so that the play can be performed in outdoor as well as indoor locations the play becomes more appealing for younger audiences **my answer actors must think

*asked on May 8, 2017* -
## physical science

A pendulum has 501 J of potential energy at the highest point of its swing. How much kinetic energy will it have at the bottom of its swing? joules

*asked on January 1, 2017* -
## Physics

A boat crosses a river of width 115 m in which the current has a uniform speed of 1.84 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 1.1 m/s

*asked on January 16, 2015* -
## math

Hi! I'm Maddie. I need some help on my homework. Here are three problems I need help with: A bowl contains only red marbles, blue marbles and green marbles. The probability of selecting a red marble from the bowl is 3/13. The probability of selecting a

*asked on August 21, 2013* -
## Human Geography (Religion)

So I have to do a project on the Cultural Interaction in Religion. My religion is Sikhism. Here are the questions I'm supposed to answer in my presentation: How does the religion impact other aspects of culture? How does this religious faith influence the

*asked on January 20, 2009* -
## Precalculus

Q: A ship leaves the port of LA and travels 120 miles on a bearing of S47ºW and then 110 miles on a bearing of N80ºW. Find the total distance traveled South and West and also its bearing from the port of LA. I have found the distance traveled South and

*asked on October 26, 2015* -
## Math

The ratio of the number of men to the number of women to the number of children in a theater is 3:5:2 there are 69 men in theater A.how many more are there in the theater B.how many children are there in theater

*asked on October 20, 2015* -
## Chemistry

Rank the following compounds in order of their solubility in water. (most soluble = 1 -- least soluble = 4)--Note that for the same solubility rank the same (a tie). (CH3)2CHOH HOCH2CH(OH)CH2OH CH3CH2OH (CH3)3COH

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

What is the molarity of nitrate ions in a solution containing 2.20 mg of Mg(NO3)2 dissolved in 7.35 L of water?

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

What mass of CH4 is contained in a 443 mL sample of CH4 at −32◦C and 282 torr? Answer in units of g. I tried so many times and I don't get it!

*asked on January 16, 2013* -
## Physics

An airplane flies due north at 260 km/h with respect to the air. There is a wind blowing at 60 km/h to the northeast with respect to the ground. What are the plane's speed and direction with respect to the ground?

*asked on October 25, 2012* -
## chemistry

A reaction occurs where the concentration of reactant A changes from 0.74 moles/liter to 0.63 moles/liter in 20 seconds. what is the average rate of reaction?

*asked on November 17, 2011* -
## poetry

i need some examples of a: metaphor, personification, and trochee. help please

*asked on May 19, 2010* -
## Mathematics

A set of Egyptian cotton sheets has a list price of 130.00 but is on sale for 84.50. By what percent is the list price reduced

*asked on November 12, 2008* -
## Global Studies

So I have to do a project on the 3 regions of Nigeria. I can't find any information on Eastern Nigeria. All I have to do is right a paragraph of that region and highlight and important features of the region. I was wondering if anyone had any information

*asked on May 15, 2008* -
## English

What other types of writing is similar to the autobiographical essay 1.an email sent to a friend that tells her about an event in your life 2.a book report you wrote for school 3.a postcard sent to your family while you are traveling. 4. A multiple choice

*asked on September 19, 2018* -
## Differential equations

Suppose a cup of coffee is at 100 degrees Celsius at time t = 0, it is at 70 degrees at t = 10 minutes, and it is at 50 degrees at t = 20 minutes. Compute the ambient temperature. So in the book I was given Newton's Heat equation. dT/dt=k(A-T) where T is

*asked on April 13, 2018* -
## Physics

I know that if a ramp is steeper, larger theta, then the object rolling down will become faster. However, if the object is rolling up the ramp will it slow down like I think it should? How can I prove this? When I try to prove it via a kinetmatics equation

*asked on December 6, 2017* -
## Science

How much effort force would you have to use to lift a 800 newton load using a pulley system with a mechanical advantage of 4?

*asked on May 15, 2017*