# find the derivative of y=(3x+1)^2 y= square root 13x^2-5x+8

97,722 questions, page 785-
## Physics help please!!!

A 2.10 kg frictionless block is attached to an ideal spring with force constant 315N/m . Initially the block has velocity -3.75m/s and displacement 0.270m . Find (a) the amplitude of the motion. (b) the maximum acceleration of the block. (c) the maximum

*asked by john on March 27, 2012* -
## Math

I have 16 numbers: 3,5,10,11,15,20,8,11,9,10,10,12,13,14, 15,10. These numbers have to be arranged in a 4 by 4 (horizontally and vertically) where each row equals 44. Please Help! Jumping rope can burn 600 calories per hour. write and solve an inequality

*asked by Dianne on December 14, 2006* -
## MATH

Brenda donates part of her salary to the local childrens hospital each month by having $15 taken out of her monthly paycheck. Write an integer to represent the amount taken out of each paycheck. Find an integer to represent the change in the amount of

*asked by Brandon Savon on September 14, 2014* -
## trigonometry- college

For two hours, a boat sails straight from port A to port C with a speed of 50 miles per hour. Port B is due east of port A, and the bearing of line segment BC is 20 degrees south west. Find the bearing of line segment AC. I really don't know what's the

*asked by jessica mantujac on February 21, 2015* -
## psychology

I need to write a psychological literature review on a specific area from one of the topics below: -Human Development -Motivation and Emotion -Personality Theories and Therapies -Psychological Disorders What is a literature review and how to write one? Why

*asked by mic_ on July 30, 2009* -
## AP PHYSICS

A gymnist is swinging on a high bar. The distance between his waist and the bar is 1.1 m, as the drawing shows. At the top of the swing his speed is momentarily zero. ignoring friction and treating the gymnist as if all his mass is located at his waist,

*asked by Mondo on November 13, 2010* -
## Physics

Suppose a monatomic ideal gas is changed from state A to state D by one of the processes shown on the PV diagram. Find the total work done on the gas if it follows the constant temperature path A-C followed by the constant pressure path C-D. A = 2atm and

*asked by Dan on December 6, 2010* -
## physics

need help with physcis vector problem Using combining vectors to find displacement problem(BEST answer)? tourist on a jet ski move 1.2km 55 degrees North of E and then 3.15km 70 degrees south of east. determine the jet ski's displacement.

*asked by jake on March 1, 2010* -
## Calculus

The demand function for a bottle of hand lotion is p(x)=0.78+0.0003x, where x is the number of bottles sold and p is the price, in dollars. The cost function is c(x)=480-0.32x+0.0005x^2. Find the marginal profit when 700 bottles of hand lotion are sold.

*asked by matt on October 19, 2016* -
## College Algebra

Suppose that the price per unit in dollars of a cell phone production is modeled by p = $45 − 0.0125x, where x is in thousands of phones produced, and the revenue represented by thousands of dollars is R = x · p. Find the production level that will

*asked by Bri on October 5, 2016* -
## Physics

A 2.10 kg frictionless block is attached to an ideal spring with force constant 315N/m . Initially the block has velocity -3.75m/s and displacement 0.270m . Find (a) the amplitude of the motion. (b) the maximum acceleration of the block. (c) the maximum

*asked by chiongo on October 24, 2014* -
## Statistics

The ages (in years) of 10 infants and the number of hours each slept in a day Age, x: 0.1, 0.2, 0.4, 0.7, 0.6, 0.9, 0.1, 0.2, 0.4, 0.9 Hours slept, y: 14.9, 14.5, 13.9, 14.1, 13.9, 13.7, 14.3, 13.9, 14.0, 14.1 Find the equation of the regression line. Then

*asked by Amanda on April 4, 2012* -
## PROBABILITY

The total amount being spent on personal calls in a month by employees of a company follows a normal distribution with a mean of $900 and a standard deviation of $50. Find the probability that in a randomly selected month the amount spent on personal calls

*asked by BBABY on May 30, 2010* -
## Statistics

A family consists of ten children. Assuming that the sexes are equally probable, find the expected number of boys in the family. What is the probability that the expected number of boys will not occur? (Not sure where to start) I got partial credit and I

*asked by Megan on October 19, 2015* -
## more math

1.) If c=12âˆš3 cm, then a=___ and b=___. 2.) A refrigerator has a width of 3 feet. The angle of elevation from the bottom corner to the opposite corner is 65º. What is the height of the refrigerator? 3.) In a 30-60-90 triangle, the shorter leg has

*asked by Unknown on June 12, 2010* -
## Physics

The soccer goal is 23.05 m in front of a soccer player. She kicks the ball giving it a speed of 17.97 m/s at an angle of 25.83 degrees from the horizontal. If the goalie is standing exactly in front of the net, find the speed of the ball just as it reaches

*asked by Lindsay on November 6, 2007* -
## bridge

Mr. Feng conducted five math tests. Trinity had completed four tests and scored 79, 78, 82, and 75. She wanted to achieve an average of 80% in her math tests. Write an inequality to find the minimum score Trinity can make on the fifth test in order to

*asked by Summer on September 6, 2016* -
## statistics

In a poll of voters in a certain city, 32% said that they backed a bill which would limit growth and development in their city. The margin of error was reported as 1.7% with 90% confidence. Determine the bounds for the confidence interval. A. (88.3%,

*asked by debbie on October 23, 2011* -
## Chemistry

Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL

*asked by Daniel on January 19, 2015* -
## Physics

A gamma ray with 700KeV energy is Compton-Scattered from an electron. Find the energy of the photon scattered at 110 degrees, the energy of the scattered electron, and the recoil angle of the electron.

*asked by Paul on September 23, 2014* -
## Physics

A gamma ray with 700KeV energy is Compton-Scattered from an electron. Find the energy of the photon scattered at 110 degrees, the energy of the scattered electron, and the recoil angle of the electron.

*asked by Paul on September 23, 2014* -
## Physics

A gamma ray with 700KeV energy is Compton-Scattered from an electron. Find the energy of the photon scattered at 110 degrees, the energy of the scattered electron, and the recoil angle of the electron.

*asked by Sarah on September 23, 2014* -
## Chemistry (Acid-Base)

Butanoic acid (Ka = 1.52 x 10-5) has a partition coefficient of 3.0 (favouring benzene) when distributed between water and benzene. Find the concentration of butanoic acid in each phase when 20.0 mL of 0.10 M aqueous butanoic acid is extracted with 25 mL

*asked by Daniel on January 21, 2015* -
## Physics

*asked by Sarah on September 24, 2014* -
## SS

The Aztecs adapted to their environment mainly by using terracing and irrigation living a nomadic hunter-gather lifestyle trading peacefully with neighbors ---- Settling along the coasts where they could find fish How did the Aztec become so powerful? they

*asked by butternutsquash on January 16, 2018* -
## English

In which of the following sentences does the use of prepositional phrases make it harder for readers to find the main point of the sentence? A. The committee voted on several of the issues under consideration. B. In what way is a political group considered

*asked by brooke on October 21, 2016* -
## Enlish

In which of the following sentences does the use of prepositional phrases make it harder for readers to find the main point of the sentence? A. The senator chose to run on a platform that cut taxes for the wealthy. B. In what way is a political group

*asked by feecan on February 11, 2018* -
## 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. One person hits the water 5.00 m from the end of the slide in a time of 1.000 s after leaving the slide. Ignoring

*asked by Vince on October 26, 2009* -
## Chemistry

A compound isolated from oil of mint has a characteristic cool, refreshing odour. It is frequently used in cough drops to ease the pain of a sore throat. This compound contains only C, H, and O. If 95.6 mg of this compound burns completely in O2, and

*asked by Chelsea on October 18, 2015* -
## Algebra

Thank you Christina.. I am taking Algebra online...something I would never recommend....How would I write the equation of the line passing through (6,37) and (1,12)? the most common way is to use y=mx + b where m is the slope and b is the y-intercept so

*asked by Misty on July 27, 2007* -
## Chemistry

A compound isolated from oil of mint has a characteristic cool, refreshing odour. It is frequently used in cough drops to ease the pain of a sore throat. This compound contains only C, H, and O. If 95.6 mg of this compound burns completely in O2, and

*asked by Chelsea on October 18, 2015* -
## Chemistry

Find the mass of water (H2O) needed to react with 150 grams of potassium (K) 2K(s) + 2 H2O (g)-2KOH +H2(g) How do I get the number of moles in H2O? Desperate to understand this. I got K= 150g./39.0983=3.84 mols of K. Then would it be 3.84(2mols H2O/7.68)

*asked by Teresa on October 27, 2014* -
## Physics

Need help with part b... I got a to be k = 94.985 N/m I can't figure out how to go about doing part b.. A platform of mass 0.79 kg is supported on four springs (only two springs are shown in the picture, but there are four altogether). A chunk of modeling

*asked by Anonymous on December 5, 2010* -
## College Alegebra

I know I have to take the log of both sides, but I don't seem to get how they work out! Can anyone explain how to do 3e^(1+x) = 2 AND 10^(2x+3) = 280 If you walk me through one I should be able to figure out the other. Hopefully... I think you need to go

*asked by Lost in Logarithms on April 1, 2007* -
## probability

two fair six-sided dice are rolled and the sum of the dots on the top faces is recorded. a) complete the table, showing the number of ways each sum can occur sum: 1 2 3 4 5 6 7 8 9 10 11 12 ways:1 2 3 b)use the table to find the probability of the

*asked by mary on November 27, 2012* -
## Math~Polynomials

1)6g+8k-9g+2k(1point) 3g+10k -3g+10k*** 17gk 10k-3 2)-4x+6x^2+5x(1point) 7x^3*** 6x^2+9x 6x^2-9x 6x^2+x 3)a^2+5a-3a^2(1point) 5a+2a^2 -2a^2+5a*** -3a^2+6a 5a-3a^2 4)3x^2+8x+7x(1point) 3x^2+15x*** 18x^3 3x^2+1 3x^2-x 5)Find the degree of

*asked by Gabby on May 13, 2013* -
## Math

Jim owns a small business. There was a loss of $26 on Thursday and a loss of $11 on Friday. On Saturday there was a loss of $9, and on Sunday there was a profit of $13. Find the total profit OR loss for the 4 days. A $33 loss B $59 profit C $19 loss D $26

*asked by Cashmere <3 on March 6, 2019* -
## precalculus

A bacteria culture initially contains 1500 bacteria and doubles every half hour. a) Find an expression for the number of bacteria after t hours. Q(t)= b) The number of bacteria after 20 minutes is (the answer must be an integer) c) The number of bacteria

*asked by josh on March 2, 2011* -
## Math :(

Please help me with this. Can you explain to me how to find the answer? Multiply 3.8*10^8 by 7.2*10^-3, leave your answer in a scientific notation. 2.736*10^4 2.736*10^5 2.736*10^6 27.36*10^5 Honestly, I don't the answer to the question So please forgive

*asked by I Dont Matter on March 13, 2018* -
## Math Help

Hello! Can someone please check and see if I did this right? Thanks! :) Directions: Find the exact solutions of the equation in the interval [0,2pi] cos2x+sinx=0 My answer: cos2x+sinx=cos^2x-sin^2x+sinx =1-sin^2x-sin^2x+sinx =-2sin^2x+sinx+1=0

*asked by Maggie on February 2, 2015* -
## Physics

A racket ball is struck in such a way that it leaves the racket with a speed of 5.6m/s in the horizontal diriction. when the ball hits the court it is a horizontal distance of 1.85 meters from the racket. FIND the height of the racket ball when it left the

*asked by Alyssa on November 29, 2009* -
## math

for every 8cds sold, there were 12 dvds sold. a combined total of 70 cds and dvds were sold. how many cds were sold that day? write a proportion to show the relationship and solve it to find the number so cds sold

*asked by dawn on January 25, 2009* -
## chemistry

Hi ! Could you please help me to see through this problem. *I know it's asking me to find the hydrogen ion concentration in a bleach sample. *If the pH meter reads 9.55..this suggest to me this is a base. Maybe,I can use the equation: pOH = -log (OH^-) =

*asked by Cliff on December 12, 2010* -
## Math

Twenty tires are tested to see if they last as long as the manufacturer claims they do. Three tires fail the test. Two tires are selected at random without replacement for an inspection. Find the probability that both tires fail the test. Which is greater,

*asked by Steve on June 2, 2014* -
## Mathematics

An investor wants to know the amount she should pay for an oil well expected to yield an annual return of 30000 for the next 30 years, after which the well will be dry. Find the amount she should pay to yield a 14% annual return if a sinking fund earns 10%

*asked by Maddie on November 17, 2008* -
## physics

An incident X-ray photon of wavelength 0.2800nm is scattered from an electron that is initially at rest. The photon is scattered at an angle of 180.0degrees and has a wavelength of 0.2849nm. Use the conservation of linear momentum to find the momentum

*asked by Libby on April 29, 2008* -
## Chemical

How i make a graphic about Pressure v/s 1/Volume? Make a table with two colums. Column 1 contains Pressure. Column 2 contains volume. P 1/V ------------------ Then place values of P and 1/V. Then plot those numbers. I can't draw it on the

*asked by Geisha on January 30, 2007* -
## Human Biology

For a portion of Junior year next year, we're supposed to build a human skeleton out of anything we can find. So most people build them out of styrofoam or clay. Do you think building a skeleton out of twigs would be creative and/or relatively easy?

*asked by Megan on June 24, 2010* -
## Discrete Math

Hi, I need help with interpreting a figure. You can find it one photobucket. First, type in flutegirl516 in the search bar and then click on the message that says: "Are you looking for the Photobucket user flutegirl516? Click here to see this user's

*asked by Francesca on February 22, 2011* -
## Math

Find the volume of water required to fill a pool with a diameter of 6m and a height of 2m. Keep in mind that the water must travel through a hose before it goes into the pool. Assume the hose is a perfect cylinder. The length of the hose is 8m and the

*asked by Travis on December 14, 2015* -
## trig

A pole is braced by two wires that extended from the top of the pole to the ground. The lengths of the wires are 16 feet and 18 feet and the measure of the angle between the wires is 110 degrees. Find, to the nearest foot, the distance between the points

*asked by Anonymous on April 21, 2013* -
## geometry

Really need help on this one Use formula to find the lateral area and surface prism area of the given prism. height=2m ends=7m and 7.28m front=29m not sure how to explain can give answer choices if that might help; 472m^2;486m^2 443m^2,486m^2 472m^2,479m^2

*asked by lilman on May 25, 2012* -
## Physics

A cylindrical carnival ride is spinning with a frequency of 0.5 Hz in a circle of radius 3 m which allows a 60 kg person to “stick” to the side of the ride as it spins. T = 2s v = 9.42 m/s A) Find the normal force exerted on the person. B) What

*asked by Sierra on November 27, 2012* -
## math

.divide AED 1380 among Ahmed John and Babita so that the amount Ahmed receives is 5 times as much as babita's share and its 3 times as much as John's share dear reiny i tried your way of doing it but i am unable to find it please help and my father gave me

*asked by sim on February 15, 2016* -
## case managment

I need to know where I can find local and state mandates for reporting suspected abuse of children, adults, and the elderly populations and local and state requirements, for a case manager or other mandated reporter, to report abuse and neglect of both

*asked by patiance on June 5, 2011* -
## math

A fair coin is flipped independently until the first Heads is observed. Let the random variable K be the number of tosses until the first Heads is observed plus 1. For example, if we see TTTHTH, then K= 5. For k = 1,2,...,K, let Xk be a continuous random

*asked by Var on October 15, 2018* -
## Chemistry Lab

What would happen to the reaction rate of a solution if 10 mL or more of water is added? Will the reaction rate increase or decrease? The following reaction occurs without a change in the color 2A (g) + B2(g) --- 2AB (g) a) How could you monitor the

*asked by Sunshine on July 20, 2009* -
## PHYSICS NEED HELP FAST

a 1.0kg beaker containgin 2.00kg of oil with a density of 916kg/m3 rests on a scale. a 2.0kg block of iron is suspended from a spring scale and completly submerged in the oil, find the euilibrium readings of both scales.density of iron 7860.

*asked by ricki on February 13, 2011* -
## Statistics Mean and Median Question

Statistics Find The Mean and Median Question 28. IQ Scores: Use the listed IQ scores. IQ tests are designed so that the mean IQ of the population is 100. Does the sample mean suggest that the sample is consistent with the population? IQ: 96 89 87 87 101

*asked by Lexus on May 13, 2016* -
## Financial managemetn

A firm's cost of financing is equal to its: WACC, required yield that investors seek for various kinds of securities, required rate of return that investors seek for various kinds of securities, or all of these answers. I am tempted to pick all of these,

*asked by Charles on December 5, 2009* -
## PHYSICS NEED HELP FAST

a 1.0kg beaker containgin 2.00kg of oil with a density of 916kg/m3 rests on a scale. a 2.0kg block of iron is suspended from a spring scale and completly submerged in the oil, find the euilibrium readings of both scales.density of iron 7860.

*asked by ricki on February 13, 2011* -
## PHYSICS NEED HELP FAST

a 1.0kg beaker containgin 2.00kg of oil with a density of 916kg/m3 rests on a scale. a 2.0kg block of iron is suspended from a spring scale and completly submerged in the oil, find the euilibrium readings of both scales.density of iron 7860.

*asked by ricki on February 13, 2011* -
## Science-Physics

As shown below, a 2.00 kg mass is connected to an unknown mass m via a massless rope and a massless, frictionless pulley. The mass m is on a ramp angled 20 degrees above the horizontal. The coefficients of kinetic and static friction are μk=0.35 and

*asked by Justin on May 12, 2016* -
## Chemistry

We did an experiment where we had to figure out the amount of water molecules in CuSO4xH2O (x being the value to find). If the stirring rod used was wet and was used to stir the beaker would this result in a higher x value? Is this a experimental or human

*asked by John on April 20, 2016* -
## Calculus HELP plz

Find the area of the surface obtained by rotating the curve y=sqrt(4x) from x=0 to x=1 about the -axis. about the x-axis. surface area= ⌠ 2pi * f(x)*sqrt[1 + (f'(x))^2] dx from a to b ⌡ it's been 45 years since I used that formula. I ended up with the

*asked by jimmy on May 12, 2007* -
## physivs

A certain CD has a playing time of 68 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude of the average angular

*asked by Anonymous on December 4, 2010* -
## math

A sum is invested at compound interest payable annually. The interest in two successive years was Rs 900 and Rs 981. Find the sum. If the sum of all internal angles and sum of all external angles of a regular polygon are equal, then the number of sides of

*asked by adam on November 20, 2015* -
## Precalc Trig

here's the question: solve for cos(2theta)=1 if you graph r= cos(2Theta) then graph r=1 you find that there are four places where the graphs intersect. however, when solved algebraically, there are two solutions which can be represented in an infinitely

*asked by Wulramm on November 20, 2015* -
## Physics

A pitcher throws a fast ball with a speed of 45m/s. The ball has a mass of 0.145kg. How much a) kinetic energy is given to the ball and b)What work was done in throwing the ball? Vo=45 m/s Mass= 0.145kg A) KE? KE= 1/2mV^2 A) 1.5x10^2 kg*m/s B) WK=Change in

*asked by Rosie on May 3, 2016* -
## Finite!!!

John Buys a used car costing $6000. He agrees to make payments at the end of each monthly period for four years. He pays 12% interest compounded monthly. What is the amount of each payment? Find the total amount of interest John pays on the loan.

*asked by Kristen Morris:) on December 13, 2011* -
## physics

For the step ladder shown in the Figure, sides and are each ft long and hinged at . is a -ft long tie rod, installed halfway up the ladder. A -kg man climbs ft along the ladder. Assuming that the floor is frictionless and neglecting the weight of the

*asked by lizzy on April 10, 2008* -
## Chem year one

what is the balanced net ionic equation for the oxidation of hydrogen peroxide by permanganate ion and find out how many moles of hydrogen peroxide react with one mole of permanganate ion. would the answer be: 2MnO4^- + 6h^+ + 5H2O2 ---> 2Mn^2+ + 8H2O +

*asked by kay on November 22, 2013* -
## chemistry

When 18 g of ethylene glycol C2H6O2 is dissolved in 150 g of pure water, the freezing point of the solution is _C . (The freezing point depression constant for water is 1.86C kg) what i tried was 18/62 to find the moles. then i got .29/.150 to solve for

*asked by david on April 7, 2008* -
## Math (please check my answer!!)

openstudy(.)com/updates/attachments/514a5d2ae4b05e69bfac38d2-mimisilly-1363828099165-ikk.png The dashed triangle is a dilation image of the solid triangle with the center at the origin. Is the dilation a enlargement or reduction? Find the scale factor. I

*asked by Rena on November 16, 2016* -
## Physics

A certain CD has a playing time of 76 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude of the average angular

*asked by John on March 24, 2008* -
## phy

A certain CD has a playing time of 72 minutes. When the music starts, the CD is rotating at an angular speed of 4.8 102 revolutions per minute (rpm). At the end of the music, the CD is rotating at 2.1 102 rpm. Find the magnitude of the average angular

*asked by nn on November 8, 2015* -
## Chemistry

I've figured out most of it. I'm not sure how to find the percentage ofd the isotope. Define the half life. The half-life of a radioisotope is found to be 4.55 minutes. If the decay follows first order kinetics, what percentage of isotope will remain after

*asked by m on March 5, 2013* -
## ENGLISH

Hello! Need someone whose mother tongue is English to explain to me what " a gentle genius" means. I am teaching English as a foreign language and this expression is one of the titles from the book. I can't find the definition online. I just came across a

*asked by refy on April 5, 2010* -
## physics

Tweety Bird hops up and down at a frequency of 0.4 Hz on a power line at the midpoint between the poles, which are separated by 18 m. Assuming Tweety is exciting the fundamental standing wave, find the speed of transverse waves on the power line. (Hint:

*asked by michelle on April 25, 2012* -
## Math

For the table that follows, answer the following questions: x y 1 1/2 2 1 3 3/2 4 - Would the correlation between x and y in the table above be positive or negative? - Find the missing value of y in the table. - How would the values of this table be

*asked by Jen on October 21, 2011* -
## Physics

a) Give the equation for terminal speed in the variables from Stoke's Law, and the densities of the sphere Ps and the fluid P1. b) Find the viscosity of motor oil (in kg/m/s) in which a steel ball of radius 0.85mm falls with a terminal speed of 4.32cm/s.

*asked by Meg on November 1, 2017* -
## science

Calculate the heat of combustion of this wax in kJ/mol. How much energy is produced per carbon? What is the limiting reagent? I have the Q=m*C*deltaT equation to be 10460.45 joules using 100.1 grams C25H52, 25 degrees C, and 4.18 J/gC. I don't know how to

*asked by Tony on November 7, 2012* -
## math

. The position of two towns X and Y are given to the nearest degree as X(45° N, 10° W) and Y (45 N°, 70° W). Find 70-10 =60 (a) The distance between the two towns in (i) Kilometers ( take the radius of the earth as 6370) 60/360 *2*3.142*6370*cos(45) =

*asked by kid on April 15, 2018* -
## Chemistry Lab

What would happen to the reaction rate of a solution if 10 mL or more of water is added? Will the reaction rate increase or decrease? The following reaction occurs without a change in the color 2A (g) + B2(g) --- 2AB (g) a) How could you monitor the

*asked by Sunshine on July 20, 2009* -
## trig

A plane has an airspeed of 190 miles per hour and a heading of 24.0°. The ground speed of the plane is 214 miles per hour, and its true course is in the direction of 40.0°. Find the speed and direction of the air currents, assuming they are constants.

*asked by janice on November 16, 2012* -
## Physics

A table can be modeled as a flat block supported by four identical legs. If the mass of the top block is 10 kg and each leg is a uniform rod with height of 1m and mass of 5 kg. Find the gravitational potential energy of the table. Take the ground as the

*asked by Ho on March 10, 2014* -
## pre-calculus

Assume that the number of bacteria follows an exponential growth model: P(t)=P0ekt . The count in the bacteria culture was 900 after 20 minutes and 1600 after 30 minutes. (a) What was the initial size of the culture? (b) Find the population after 80

*asked by kevin on November 7, 2016* -
## physics

A girl and the bike she is riding have a combined mass of 73.7 kg and are initially at rest but then she tosses the jug of water in her hand the forward direction. If the jug has a speed of 3.0m/s relative to the ground and the girl and bike move in the

*asked by alyssa on September 15, 2014* -
## Math

You want to conduct a survey to find out what sport the students at your school prefer to play. a) You interview 20 boys playing football at lunch. Is this a random sample? explain b) The survey question you ask is, ''What is your favorite sport to play?''

*asked by Liv on April 29, 2014* -
## Maths Help!!

Melisa used 0.6kg of red sand to make a mural on the wall. She added 250g of blue sand to it. Finally she added 500g of white sand to half of the mixture. Find the mass of the mixture that has white sand in it. Express your answer in kilogram

*asked by Jane on August 15, 2014* -
## Math/Pre-calculus

Assume that the number of bacteria follows an exponential growth model: P(t)=P0e^k/t. The count in the bacteria culture was 400 after 10 minutes and 1500 after 35 minutes. (a) What was the initial size of the culture? (b) Find the population after 85

*asked by liza on June 19, 2017* -
## math

You have been asked to build a ramp for Dan’s Daredevil Motorcycle Jump. The dimensions you are given are indicated below. Find the height and incline in feet. Round to the nearest foot One side is 200 ft.The angle between the hypotenuse and the side of

*asked by river pond on October 24, 2014* -
## math

9. On a spelling test Carlos had to spell 25 words. He earned 4 points for every word he spelled correctly. Which equation can be used to find p, the total number of points Carlos earnedfor spelling w words correctly? A p w −. B p = 4. ) C p

*asked by anne on February 14, 2014* -
## MATH

FOOTBALL. During a field goal attempt, the function h(d)= -0.02d+ 0.9d models the height, h(d) meters, of a football in terms of the horizontal distance, d meters, from where the ball was kicked. Find the horizontal distance the ball travels until it first

*asked by Jeanine on July 13, 2008* -
## physics

a 2000kg car travelling west with a speed of 20m/s collides at an intersection with a 3000kg car travelling south at a speed of 20m/s. find the direction and magnitude of the velocity of the wreckage after the collision, assuming the collision was

*asked by Mostafa on July 7, 2015* -
## mathematics

Please help me answer this question; 1.A metal gutter open at the tops and ends, is bent up from material 30 cm wide to form a rectangular cross section. a) If the base of the gutter is x cm wide, find the height of the gutter. b)Show that the area of the

*asked by Ruby on August 29, 2011* -
## precalc

The angle of elevation to the top of a building from a point on the ground 20 degrees and the angle of elevation from a point 25 feet farther away is 12 degrees. Find the height of the building. How would I begin to solve this problem? I do not know what

*asked by adam on December 25, 2014* -
## 11th grade

The arch of a bridge is a semi ellipse, the span is thirty feet and the top of the arch is ten feet above the major axis. the roadway is horizontal and is two feet above the arch. find the vertical distance from the roadway to the arch at five feet

*asked by student on September 28, 2008* -
## stats

so the question is: the weights of fish in a certain lake are normally distributed with a mean of 10, a standard deviation of 6. if 4 fish are selected what is the probability that the mean weight will be between 7.6 and 13.6? so usually to find prob, we

*asked by paul on October 25, 2015* -
## algebra

An archer releases an arrow from a shoulder height of 1.39 m. When the arrow hits the target 18 m away, it hits point A. When the target is removed, the arrow lands 45 m away. Find the maximum height of the arrow along its parabolic path. please help!!I

*asked by shannon on November 5, 2013*

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