# mat

Most popular questions and responses by mat-
## science

what do angiosperms reproduce with??/

*asked on November 11, 2013* -
## Physics

A ballistic pendulum is a device for measuring bullet speeds. One of the simplest versions consists of a block of wood hanging from two long cords. (Two cords are used so that the bottom face of the block remains parallel to the floor as the block swings

*asked on November 1, 2016* -
## Physics

A 0.45-kg soccer ball is kicked at an angle θ above the ground with initial speed vi. Determine the height of the ball as a function of the horizontal distance d it travels down the field.

*asked on November 1, 2016* -
## Psychology

A fleet of large trucks arrived in the mall parking lot after Janelle parked her car. When she returned to the lot she could not find her small vehicle in the maze of huge trucks. It took her at least half an hour of searching before she located her car.

*asked on July 26, 2013* -
## socialstudies(5Qs)

hi guys could you check my social studies answer thanks.oh and if there wrong could you give me the right answer and some information. ---------------------------------------- 1.The climate throughout most of the united states is__________. A.tropical

*asked on November 4, 2013* -
## Chemistry

If 18.0g of CO2 is produced in the reaction of C2H2 with O2 to form CO2 and H2O how many grams of H2Oare produced

*asked on November 25, 2010* -
## socialstudies(2Qs)

A woman has just lost her job at an automobile factory.She decides to move some place warmer to look for work in the thriving tourist industry.She is most likely migrating between which two regions? A.from the southeast to the northeast B.from the

*asked on November 5, 2013* -
## 9th grade

How do you calculate the thermal amplitude

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

a copper wire with a diameter of 1.5mm is joined to an aluminium wire which has a diameter of 2.3mm.the wire carries a current of 12A.what is the current density in each wire

*asked on February 18, 2016* -
## math

1.62 is divible by which of the following numbers? A.1,3,31,62 B.1,2,3,31 C.1,4,16,62 D.1,2,31,62 I PICKED D. ------------------------------- 2.108 is divisible by which of the following sets of numbers? A.1,2,3,4,6,9,12,18,27,36,54,108 b.1,2,4,27,54,108

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

what products result from mixing aqueous solutions Cu(C2H3O2)2(aq) and Rb3PO4(aq)?

*asked on September 26, 2018* -
## Stats

Observations are taken on sales of a certain mountain bike in 30 sporting goods stores. The regression model was Y = total sales (thousands of dollars), X1 = display floor space (square meters), X2 = competitors’ advertising expenditures (thousands of

*asked on September 30, 2010* -
## Calculus

I have to find the area of the largest possible rectangle that can be inscribed under the curve y=e^(-x^2) in the first and second quadrants. How do I do this? It is symmetrical, so one could ignore the second quadrant, and work on the largest rectangle in

*asked on December 2, 2006* -
## cal

Sketch the graph and show all local extrema and inflection points. f(x)= 1/x^2-2x-8 I believe the ans is "Relative max: [1,-1/9]" and No inflection points".

*asked on November 21, 2013* -
## Psychology

Do you think John forgets the time of his appointments? Perhaps he is always late because it makes him feel powerful or, maybe he is just disorganized?" These questions are being asked in order to A. determine whether John's tardiness is

*asked on July 26, 2013* -
## algebra

Suppose a population of bacteria in a Petri dish has a doubling time of 6 hours. How long will it take for an initial population of 11000 bacteria to reach 20500? Round your answer to two decimal places.

*asked on April 9, 2016* -
## physics

a wire has a resistance of 6 ohm it is stretched out to a new length which is three times its original length what is the resistance of the longer wire?assume uniform diameter.resistivity and density are constant

*asked on February 22, 2016* -
## physics

What is the apparent weight of a 25kg lead block submerged in the dead sea? (density of dead sea is 1240kg/m3)

*asked on September 17, 2013* -
## Chemistry

What type of atomic orbital has 2 nodal planes?? I got 3d, but would it be just d since nodal planes = angular momentum #??

*asked on November 6, 2017* -
## Physics

Two identical positive charges exert a repulsive force of 7.0 10-9 N when separated by a distance of 3.2 10-10 m. Calculate the charge of each. _C

*asked on April 26, 2013* -
## gr 11 physics

as a rocket carrying a space probe acceleraes away from earth the fuel is being used up and the rocket's mass becomes less when the mass of a rocket(and its fuel) is M and the distance of the rocket from eart's centre is 1.5rE, the force of gravitational

*asked on November 26, 2009* -
## Chemistry

A silver-copper alloy had a mass of 0.1264g. When the alloy was dissolved in nitric acid and the silver precipitated as silver chloride, the precipitate had a mass of 0.1375g. Calculate the percent of silver in the alloy. So, how would you do this? Is it

*asked on September 4, 2008* -
## english

Read the following paragraphs and write a topic sentence that expresses the main idea of each. For example, if it is a sport, then some people wonder why cheerleaders must also be concerned with the neatness and uniformity of their appearance. In addition,

*asked on July 25, 2013* -
## math

1.A father can do a job in a certain number of hours. His son takes twice as long to do the job. Working together, they can do the job in 6 hours. How many hours does it take the father to do the job alone? A.9 B.18 C.12 D.10 3.David is 5 years older than

*asked on July 30, 2014* -
## math

A school booster club is selling T-shirts. The silk screening company is selling shirts to the boosters for $3 each, plus a one-time fee of $150 to cover supply costs. If the boosters want to make at least $300 in profits and they sell a shirt for $12, how

*asked on July 29, 2014* -
## Algebra

The mean amount of money withdrawn from a bank ATM on a particular day was $120. If Lauren withdrew $80 and her z-score was -3.2, what was the standard deviation for the amount withdrawn that day?

*asked on May 17, 2018* -
## Fermats Little Theorem

Good morning, Just working through an example but ive gotten stuck and need some help. So find the least residue of 8^123 Mod 61 So 8^60 = 1 (mod 61) 8^120 = (8^60)^2 = 1^2 = 1 (mod 61) 123 = 2*60+3 So 8^2*60+3 = (8^60)^2 x 8^3 = 1^2 x 8^3 = 1 x 512 = 512

*asked on October 15, 2016* -
## Psychology

I have never been a good problem solver. I am not direct enough to be successful," the client complained. "You do not see yourself as a direct problem solver?" responded the therapist. This conversation is typical of _______________. A. dialectical

*asked on July 26, 2013* -
## Finance Homework/ Have 2nd Part Need Calculate1st

An investment will pay $100 at the end of each of the next 3 years, $400 at the end of Year 4, $600 at the end of Year 5, and $700 at the end of Year 6. If other investments of equal risk earn 8% annually, what is its present value? What is its future

*asked on February 18, 2011* -
## Psychology

Unfortunately I have a D in the class, but I am an A student." When there is a difference between what I believe and what I do, A. cognitive dissonance will develop. B. social cognition will be less decisive. C. central route processing will

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

After a day of testing race cars, you decide to take your own 1590 kg car onto the test track. While moving down the track at 10.0 m/s, you uniformly accelerate to 26.0 m/s in 10 s. What is the average net force that you have applied to the car during the

*asked on December 3, 2012* -
## physics

A body is suspended vertically from an ideal spring of spring constant 3.4 N/m. The spring is initially in its relaxed position. The body is then released and oscillates about its equilibrium position. The motion is described by the following equation.

*asked on November 13, 2011* -
## Calculus, Math word problems.

A closed box is to be made in the shape of a cubiod, of height h cm and with a square base that has sides of length x cm. Its volume V is required to be 500 cm^3. A) write an expression for the V (volume)in terms of h and x. B)Write an expression for the

*asked on March 1, 2016* -
## Chemistry help

How many electrons are in p orbitals in an atom of oxygen? I answered 8 and 6 but it's wrong. Can anyone pls help.

*asked on March 27, 2015* -
## math

Maria gave a store clerk $10.00 for a purchase that cost $9.19. Part A What is the total amount of change Maria should have received from the clerk? Part B How would Maria receive her change using the least number of coins possible? Part C Show 1 way Maria

*asked on March 11, 2013* -
## Physics- Help

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

*asked on December 3, 2012* -
## math

10x^2+5 y^2-2xy-28x-6y+41=0 and 3x^2-2y^2+5xy-17x-6y+20

*asked on October 29, 2011* -
## math

a coast guar ship left a port at 30 mph. four hours later a helicopter was dispatched at 90 mph to intercept the ship. how long will it take the helicopter to catch the ship?

*asked on October 17, 2010* -
## science

I am a main group element. I have 3 p-orbital electrons in my valence shell. I have a lower first ionization energy than arsenic. I am not the largest atom in my group. What element am I?

*asked on September 22, 2009* -
## engineering

A cast-iron saucepan of mass 1.4kg is filled with 5L of water at 15°C, placed on an electric hotplate, and bought up to boiling point. What is the cost of the energy used if the electricity costs 10 cents per kWh and the hotplate has an efficiency of 70%.

*asked on September 13, 2016* -
## math

The efficiency e of a gasoline engine as a function of its compression ratio r is given by e =1− r1−γ , where γ is a constant. Find γ for e = 0.55 and r = 7.5.

*asked on May 10, 2015* -
## Math

Find the real and imaginary parts of the following complex numbers: (i) 1.5e^jπ/4 (ii) je^1.2 + j^2 e

*asked on April 10, 2014* -
## math

Use logarithmic differentiation to find the derivative of the function. y = (cos 2x)x

*asked on April 5, 2014* -
## Calculus

Find the derivative of the following function: f(x)= 10x-3/5x +6x

*asked on May 20, 2013* -
## physics

A bullet of mass 10.8 g leaves a gun barrel with a velocity of 511 m/s. What is the bullet's kinetic energy? answer in joules

*asked on March 7, 2011* -
## world history

Who was the George Washington of South America?

*asked on April 10, 2010* -
## science

What is the definition of organic compound?

*asked on December 1, 2009* -
## econ

Real GDP equaled $9,191 billion in 2000 and $9,215 billion in 2001. Both figures are adjusted for changes in the value of the dollar using a chained price index with a base year of 1996. Which of the following could explain the increase in real GDP in

*asked on June 30, 2009* -
## US

Which of the following contributed most to the development of religious toleration in the British colonies? (A) The stand of Roger Williams in defense of liberty of conscience (B) The Puritan guarantee of religious freedom to settlers in the Massachusetts

*asked on September 11, 2008* -
## economics

In the below table, which country has the least equal distribution of income? The most equal distribution? Percent of Income Quintile A B C 20 8.5 10.2 2.3 40 10.1 15.2 6.1 60 12.5 18.3 12.3 80 15.1 23.1 18.1 100 53.8 33.2 61.2

*asked on August 18, 2008* -
## Science

We have a problem in AP Physics that we just can't get. It has to do with vector addition. The problem is: If aA+bB+C=0, find the magnitudes of a and b. *A, B, and C are vectors* *i and j are unite vectors* A=(6.0i-8.0j)units B=(-8.0i+3.0j)units

*asked on October 2, 2007* -
## Maths, multiplicative inverse

Show that -3 is a multiplicative inverse of 17 modulo 26.

*asked on November 27, 2016* -
## Calculus,Stationary Points,First derivative test

Good afternoon, I need a bit of help. So ive got my first derivative which is 6x^2-6x-12 and the stationary points ive found are x=-1 and x=2 at which points the value of the derivative is zero. So im attempting to classify the points. From my derivative

*asked on January 17, 2016* -
## math

By mass a certain material is 75% sand and another is 30% sand. How many tonnes of each must be mixed in order to have 250 tonnes of material that is 50% sand?

*asked on April 11, 2015* -
## science

how do you covert 0.779 kl to l to ml to hl using the decimal method

*asked on September 21, 2014* -
## cal

Find the integral. ∫ -10 x sin x^2 dx

*asked on November 22, 2013* -
## Psychology

One of the interesting aspects of family therapy is the "system" or roles which are assumed by family members. A good example would be _______________. A. the father sometimes comes home late B. the mother has difficulty making decisions

*asked on July 26, 2013* -
## calculus

A manufacturer wishes to produce the most economical packaging for detergent. The containers need to hold 25litres and must be cylindrical in shape. What dimensions will ensure that the least amount of plastic is used to create the containers. (Note: the

*asked on May 20, 2013* -
## Physics

An object in equilibrium has three forces exerted on it. A 30 N force acts at 90° from the x axis and a 48 N force acts at 60°. What are the magnitude and direction of the third force? . N ° (counterclockwise from the +x direction)

*asked on December 3, 2012* -
## physics

A diver runs and dives off the end of a spring board that is 0.9 meters above the surface of the water. As she takes off from the diving board, her velocity is 5.2 m/s directed 36° above horizontal calculate: a) the time she is in the air s b) the

*asked on October 29, 2012* -
## math

the distance x cm and y cm are related by the eqt. 1/x+1/y=1/9, if x is increasing at a rate of 8 cm/s, calculate the rate at which y is changing when x=15. [ans:-18]

*asked on July 22, 2011* -
## sentences please help

whats a sentence for rivals, otanist, nurient.

*asked on May 5, 2010* -
## 8th grade

how do we learn./

*asked on January 20, 2010* -
## science

I am a metal. I am a transition metal. I have the smallest atomic radius in my group. I have 6 valence electrons. What element am I?

*asked on September 22, 2009* -
## Science

I am a non-metal. I belong to the Halogen family. I am not the largest or smallest atom in my group. My first ionization energy is greater than that of iodine. I am not a gas at room temperature. What element am I?

*asked on September 22, 2009* -
## history

Who are Frances current Allies & Enemies?

*asked on January 25, 2009* -
## digital electronics

Hi everyone. Im not sure how to draw PLA and PAL Circuit for the following simplified Boolean expression "F=A+~B+D" its a 4 input circuit. can someone please provide me with drawing below if possible is not then kindly email me on "mattkazma@gmail com".

*asked on June 22, 2018* -
## Math

A professor at a school of Architecture designed an asymmetrical A-frame house pictured below. The included angle between sides AB and CB, which measure 30.96 ft and 17.78 ft, respectively, measures 67 degrees. Find the length of side AC.

*asked on October 29, 2016* -
## Maxima, Stationary Points

Long shot but does anyone have experience of using Maxima (maths program) for finding stationary points. My user guide offers no help, ive tried to manipulate the following derivative to find the stationary points however its not proving helpful.

*asked on March 5, 2016* -
## physics

find the approximate current density when an electric field of 5v/m is applied to a copper conductor.the conductivity of copper is 59.6*10^6

*asked on February 18, 2016* -
## math

Michelle will divide 36 herbal tea bags and 48 mint tea bags among gift boxes. Each gift box will have the same number of herbal tea bags and the same number of mint tea bags. What is the greatest number of gift boxes Michelle can make?

*asked on July 30, 2014* -
## english essay

can someone proofread my essay please. Martin Luther king Jr, Mrs Gonsalvez, Mr Bryce what do they have in common? Well their leaders. Leaders are people who are kind and caring, But how did they become leaders?. Well they started off as a good student

*asked on May 14, 2014* -
## Integrals

Give a geometric description (including a sketch) of the integral 0∫3 2x − 3x dx .

*asked on May 24, 2013* -
## calculus

A particle moves in a straight line under a force such that its displacement s(t), in metres, at time t seconds, is given by s(t) = t3 − 5t2 + 3t +15 Find the time at which the particle is at rest?

*asked on May 23, 2013* -
## calculus

Find the area of the region between the parabola 4y = x^2 and the line 3x + 4 y = 4

*asked on May 21, 2013* -
## calculus

Find the volume of the solid that is obtained when the region under the curve y = 4 − x^2/6 is revolved around the y -axis between y = 0 and y = 4 .

*asked on May 21, 2013* -
## Physics

A 2.3 kg block slides down a 25° inclined plane with constant acceleration. The block starts from rest at the top. At the bottom, its velocity is 0.65 m/s. The incline is 1.6 m long. What is the coefficient of friction?

*asked on December 20, 2012* -
## Physics- Help

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

*asked on December 3, 2012* -
## Physics- Help

Five forces act on an object. (1) 63 N at 90° (2) 40 N at 0° (3) 75 N at 270° (4) 40 N at 180° (5) 50 N at 60° What are the magnitude and direction of a sixth force that would produce equilibrium?

*asked on December 3, 2012* -
## chemistry

the density of water 20 degrees celcius is 1.00g?mL and the densityof ethylene glycol is 1.114g/mL, if 100.0mL if water is combined with 25.0mL is ethylene glycol, what would be the density of this mixture?

*asked on October 17, 2012* -
## English

Can someone help please: What are 2 events that ended the Progressive era?

*asked on April 8, 2011* -
## science

I am in the p-block of the Periodic Table. My melting point is the highest in my period (ignore tansition metals). I am not the smallest atom in my group. My first ionization energy is greater than that of germanium. What element am I?

*asked on September 22, 2009* -
## algebra

how do i figure this out step by step? 3x-7=5x+13

*asked on October 5, 2008* -
## CORRECTED ECONOMICS ?

You own four firms that produce different products. The following table summarizes the conditions in each firm. After calculating the missing numbers for each firm, make one of the following four decisions regarding operations in each firm, and explain why

*asked on August 25, 2008* -
## Economics

You own four firms that produce different products. The following table summarizes the conditions in each firm. After calculating the missing numbers for each firm, make one of the following four decisions regarding operations in each firm, and explain why

*asked on August 25, 2008* -
## ECONOMICS-REPOST

In the below table, which country has the least equal distribution of income? The most equal distribution? Percent of Income Quintile A B C 20 8.5 10.2 2.3 40 10.1 15.2 6.1 60 12.5 18.3 12.3 80 15.1 23.1 18.1 100 53.8 33.2 61.2

*asked on August 18, 2008* -
## Digital Electronics

Hi everyone. Im not sure how to draw PLA and PAL Circuit for the following Boolean expression "F=A+~B+D". can someone please provide me with drawing below if possible is not then kindly email me on "mattkazma@gmail. com". please let me leave me response if

*asked on June 22, 2018* -
## maths prove help asap

plz help 1.for any 2 non-zero integers x and y there exist a unique integer q and r called the quotient and remainder respectively such that x=yq+r where

*asked on March 6, 2018* -
## Math

f(sqrt 3-sqrt 2)=x^2-3x+4

*asked on July 6, 2017* -
## calculus

Let y = sinx + ztanx,where z is a function of x. If (dy/dx)= z+ cosx, show that (d^2y/dx^2) =-y. I really have no idea how to do this. Please show me

*asked on April 30, 2017* -
## Differential equations

Good morning. Quick question. dr/dt=K/r^2 When the radius is 3cm, the radius is increasing at a rate of 5/36pi. Use this fact to find the constant K. I know that the general form of these growth factors is e^kt but im not sure where the rate and the

*asked on February 19, 2017* -
## Geometric Transformation, Unit Circle, Maths

Good morning, I have this question: the matrix A = 0 6 4 12 i) show that it is invertable. ii)Find the equation of the image f(c) of the unit circle c in the form. ax^2+bxy+cy^2=d iii)Calculate the area enclosed by f(c). ---------------------------------

*asked on February 18, 2017* -
## parametrics

How do I work out the second quadrant parametrisation of 5x^2+16y^2=45. I have x=3 cos t, y=3sqrt5/4 sin t so far. Thanks

*asked on December 5, 2016* -
## Silmultaneous Equations

Need a bit of help solving the following equations. sqrt(5/8-(sqrt(5)/8))LH+cos (43pi/180)RH = 0 and 1/4(1+sqrt(5)LH+sin(43pi/180)RH-2g=0 What is the best way to start when trying to combine these equations? Thanks

*asked on December 5, 2016* -
## Statics

I would like to write vector expressions and determine the andle the slipe makes with the horizontal for the following. a 2kg block is on a slope and is about to slip down, the coefficient of static friction is 0.4. so far I have W=2g F=Fi N=Nj and tan-1

*asked on December 5, 2016* -
## math

Given f (t) = t^3 −3 , find f(a - 1).

*asked on April 13, 2015* -
## math

This was on my test and have a few more question that is from my test. 18.The Sum of five unequal natural numbers is 90. The second largest of these five numbers can be at the most? A.19 B.41(41 is the right answer) C.44 D.43 E.42 please show work. 22.In

*asked on July 30, 2014* -
## cal

Find f"(x) for the function. f(x)= x^2+√x

*asked on November 22, 2013* -
## Calculus

Find the derivative of the following function f(x)=(x-3/2x+3)^2

*asked on May 20, 2013* -
## Math 208

N=0.04x-78.34 determine the year in which there were 1.9million inmates

*asked on December 17, 2012*

## Pages

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