# Maddie

Newest questions and responses by Maddie-
## 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* -
## 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* -
## 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* -
## 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* -
## chemistry

1125 J of energy is used to heat 250 g of iron. After heating, the final temperature of the iron is measured as 55 °C. The specific heat capacity of iron is 0.45 J/(g·°C). What was the initial temperature of the iron? A. 45 B. 55 C. 20 D. 35 I don't

*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* -
## 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* -
## Differential equations

solve 1/(x^2+1) * y' + xy = 3 for y(0)=0 So I needed to find the integrating factor which is r(x)=e^(integral(p(x)dx)) so here p(x) is just x therefore r(x)=e^(x^2/2)? Then I am supposed to be able to put it in the form d/dx(r(x)y)=RHS but this doesn't

*asked on April 13, 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* -
## Calculus

I have a differential equation stating solve: y'=(y-1)(y+1) when y(0)=3 I separated the dy/dx so I got dy/(y-1)(y+1) = dx took the integral of both sides and solved with PFD I then got that x= 1/2 ln(y-1) - 1/2ln(y+1) +c I solved for C and got that C=.3466

*asked on April 7, 2018* -
## 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

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* -
## 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* -
## 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

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* -
## 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* -
## 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* -
## Physics

How would I find final velocity at the top of an inclined ramp with a given angle theta?

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

determine whether the number sentence is true. In each case explain how you could answer without calculating. Check your answers by doing the indicated calculations. A. 50 x 432= (50 x 400) + (50 x 32) B. 50 x 368 = (50 x 400) - (50 x 32) C. 50 x 800= ( 50

*asked on October 25, 2017* -
## 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* -
## science

Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up

*asked on October 7, 2017* -
## science

Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up

*asked on October 7, 2017* -
## science

Special telescopes, such as the Chandra X-ray Telescope, help astronomers see different kinds of electromagnetic radiation besides visible light. Why is this helpful? • X-Rays give off a spectrum of light that tell astronomers what elements make up

*asked on October 6, 2017* -
## 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* -
## math/econ

If the demand is x(p)=40(p-15^2) with p being the price and x being hte demand, what would the elasticity of demand equation be?

*asked on July 20, 2017* -
## Calculus

How do I find the derivative of e^y -y=x^2 -2? Do I use chain rule with -d/dy or -d/dx or dy/dx? And then how do I find the slope of the graph if the point's at (2,0)?

*asked on July 19, 2017* -
## Calculus

How many units should this company sell to maximize their revenue if the revenue function was -(x^2/100)+50x using derivatives?

*asked on July 18, 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* -
## 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* -
## Math

Solve and graph the following inequality: -m/5+8>10

*asked on May 7, 2017* -
## Science

Which of the following is NOT a characteristic of an animal? Have eukaryotic cells digest their food make their own food******* have many cells with different functions

*asked on April 10, 2017* -
## Science

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

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

In constructing a box-and-whisker plot for the data set below, at which values would you draw the left and right sides of the box? 6, 7, 1, 3, 9, 3, 2, 5, 8, 4, 8 A. left at 3; right at 8 B. left at 2; right at 8 C. left at 2; right at 7 D. left at 3;

*asked on April 5, 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* -
## 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* -
## Maths

Allan buys a used car for his daughter by paying a 20% deposit and $275 per month for 4 years. If the car has a cash price of $10 400, find the flat interest rate (p.a.) correct to one decimal place. I got 14.7% but the answers say 58.7 could someone

*asked on March 3, 2017* -
## Social studies

Which of the following was the first major battle of the civil war

*asked on February 13, 2017* -
## 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* -
## 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* -
## Please help (MATH)

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

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* -
## 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

One leg of a right triangle is one less than twice the other. The area of the triangle is 18 square feet. What is the length of the 3rd side of the triangle? Solve by factoring. A= 1/2 (b)(h) 18= 1/2 (x)(2x-1)

*asked on January 29, 2017* -
## Physics

These are Thermodynamics questions: There is a 7 kg piece of aluminum at 80°C placed in a 3 kg water at 20°C what is the final temperature? There is a piece of aluminum at 90°C placed in 2 kg of water at 35°C how much energy is transferred if the final

*asked on January 13, 2017* -
## History

How are women increasingly impacting politics in America because of the 19th amendment?

*asked on January 11, 2017* -
## Math

Convert equation from quadratic form to vertex form, y= a(x-h)^2 +k, by completing the square. y= -.25x^2+5.5x-5.25

*asked on January 10, 2017* -
## Math

Use the quadratic formula to find the roots Y= -.25x^2 + 5.5x- 5.25

*asked on January 10, 2017* -
## 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* -
## 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* -
## 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* -
## 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

If you had 73 and you divided it by 5 what is your answer?? Answer:14.6

*asked on November 3, 2016* -
## Science

Plz HELP me !!!!! I need to know a acrostic poem about safety plz help me it is due tomorrow

*asked on September 7, 2016* -
## 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* -
## 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* -
## Geography

What are the political, economic, and social reasons why the stamp act was not not fair to the colonist?

*asked on May 6, 2016* -
## Physics

A block of mass m=25 kg is hung by a massless rope of length L=1.90 m from the ceiling of an elevator. The elevator has a downward acceleration of a=2.20 m/s^2. When the pendulum is set in a small amplitude oscillation, the period T of the pendulum is: A)

*asked on May 2, 2016* -
## 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* -
## Algebra, math

What happened when 1000 baseballs fell from an airplane?

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

If colonial boundaries have produced a large number of problems for African countries, could the contient's people revert to the boundaries that existed before European colonialism? What other solutions might there be to the problems created by Africa's

*asked on April 11, 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* -
## 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* -
## 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* -
## 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* -
## CHEMISTRY! HELP

I'm not sure how to do or show the work for these two questions. A) & B.)!! please anyone help: A.) Suppose a chemical reaction starts with 5.00 g of copper (i) nitrate and 2.00 g of magnesium chloride. Balanced Equation: 2 CuNo3 + MgCl2 ---> 2 CuCl +

*asked on February 23, 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* -
## 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* -
## percentages

140% of what is 35? How do I solve it?

*asked on January 12, 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* -
## Pre calculus

Use the given conditions to write an equation for the line in point-slope form. Passing through (-5, -7) and (-8, -6)

*asked on December 3, 2015* -
## Simple pre cal

Is the relation a function? {(14, 9), (15, 8), (8, 7), (1, 9), (15, 2)}

*asked on December 3, 2015* -
## algebra

Sam spent 36.00 more than Lisa.They spent 75.00 total.How much did they spend each?

*asked on December 2, 2015* -
## social justice

what are examples of distributive, retributive, and communative justice?

*asked on November 30, 2015* -
## math

Explain why the graph of g(x) = 1/x has a horizontal asymptote. What is the equation of this asymptote? Will all reciprocal functions have the same horizontal asymptote?

*asked on November 15, 2015* -
## 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* -
## Algebra

Maria starts walking at 8:00 at 4 miles per hour. Nichole starts walking at 8:12. At what constant rate of speed will Nicole need to walk to catch Maria at 8:42?

*asked on November 4, 2015* -
## 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* -
## 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* -
## 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

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

A voltaic cell can be built using the reaction between Al metal and O2 from the air. If the Al anode of this cell consists of 65 g of aluminum, how many hours can the cell produce 1.5 A of electricity, assuming an unlimited supply of O2?

*asked on October 18, 2015* -
## Math

What is 12 1/9+10 2/3? I need help please!;]

*asked on October 15, 2015* -
## Foley

Math angle 1 is complementary to angle 2. angle 2 is supplementary to angle 3 equal to 126 degrees. find measure angle one

*asked on October 2, 2015* -
## 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

Find two consecutive odd integers such that the sum of four times the larger and twice the smaller is 194. Help Thank you!

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

Find two consecutive odd integers such that the sum of four times the larger and twice the smaller is 194. Please help! Thank you!

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

Mrs. Cress's table measures 5 ft wide and 8 ft long. She wants to cover the table with 3 in square tiles. How many tiles will she need? Help Thank you!

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

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

*asked on September 8, 2015* -
## music appreciation

The basic framework for ordering music through time is the A. syllable. B. meter. C. value. D. phrase. I'm pretty sure it's B, but I really wanna ace this test.

*asked on September 7, 2015* -
## psychics

you throw a ball straight upward into the air with a velocity of 20.0 m/s, and you catch the ball some time later. a) how long is the ball in the air b)how high does the ball go c) what is the balls velocity when you catch it I don't get how you are

*asked on August 20, 2015* -
## 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* -
## 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* -
## math

the areas of the rectangular faces are: 90, 54, and 60. What is the volume of the box?

*asked on April 29, 2015* -
## math

a rectangle has an area of 48 square yards. For what whole number values of length and width will the rectang,e have the smallest perimeter?

*asked on April 29, 2015* -
## math

for what whole number values of length and width will the rectangle have an area of 60 square yards and a perimeter of 38 yards?

*asked on April 29, 2015* -
## PHYSICS PLEASE HELP

A very large firecracker explodes in the hallway into 3 fragments. Physics students rush to the scene to enrich their knowledge of the law of conservation of momentum. They report that Fragment 1: mass=1.23kg, v=8.70m/s, north Fragment 2: mass

*asked on April 28, 2015* -
## Physics please help

He drops a ninja ball device from a height of 10.0m. The mass of the enter device is 190g and the mass of the top (smallest) ball is 2.90g A) calculate the momentum of the device as it hits the ground (ignore air resistance) I know that this answer is 2.66

*asked on April 28, 2015* -
## Math

Take a four digit number (abcd) and repeat it to make an eight digit number (abcdabcd). This eight-digit number always has at least three different prime factors, unless you start with a certain four-digit number. Which number is it?

*asked on April 15, 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*