Questions Asked on
October 4, 2015

PHYSICS
A car is traveling up a hill that is inclined at an angle θ above the horizontal. Determine the ratio of the magnitude of the normal force to the weight of the car when (a) θ = 15o and (b) θ = 32o.
asked by Anonymous 
algebra
A 28inch board is to be cut into three pieces so that the second piece is twicetwice as long as the first piece and the third piece is 44 times as long as the first piece. If x represents the length of the first piece, find the lengths of all three
asked by Anonymous 
calculus
If f(x) = 5ex cos x, find f '(x) and f ''(x).
asked by jam 
Math
The lcm of two numbers is 40 one of the numbers is 5 what is the other numbers
asked by Angaly 
PreCalculus
The cup on the 9th hole of a golf course is located dead center in the middle of a circular green that is 70 ft in diameter. You ball is located 50 feet south, and 40 feet west of the cup. The ball follows a straight line path and exits the green at the
asked by Anonymous 
Math
If one honeybee makes 1/12 teaspoon of honey during its lifetime. how many honey bees are needed to make 1/2 teaspoon of honey? 1/12*2/1= 2/12=1/6 ???
asked by MVN 
Math
Find the value of an odd natural number x if LCM(x, 40)=1400
asked by Exerice 1.1 
Physics
A quarterback throws a pass at an angle of 40 degrees above the horizontal with an initial speed of 20 m/s. The ball is caught by the receiver 2.55 seconds later. Determine horizontal velocity, vertical initial velocity, the distance ball was thrown, and
asked by JoseF3 
math
Types of bonds are divided into three categories: good risk, medium risk, and poor risk. Assume that of a total of 13,838 bonds, 7,035 are good risk, 1,388 are medium risk, and the rest are poor risk. One bond is chosen is chosen at random. what is the
asked by Anonymous 
chemistry
The weak acid HQ has pKa of 4.89. 1)Calculate the [H3O+] of .035 M HQ. 2)Calculate the (OH) of 0.500 M HQ ....Am I correct? a) pKa = 4.89 =>  log(Ka) = 4.89 => Ka = antilog( 4.89) = 104.89 = 1.29x105 1. Given concentration of HQ, C = 0.035 M
asked by patrick 
chemistry
How many moles of H3O+ or OH must you add per liter of HA solution to adjust its pH from 9.75 to 9.01? Assume a negligible volume change. ……….x 10………Moles of ……………………..h3O+ or OH I got 4.6001 x 105 M of h3o+...but it was
asked by patrick 
Chemistry (Le Chatelier's Principal)
Methanol has the formula CH3OH and can be produced by the reaction of carbon monoxide with hydrogen gas. CO + 2 H2 ￼￼ ￼CH3OH + heat In an attempt to maximize the yield of methanol (amount of methanol produced), a chemist would try to shift the
asked by Terry 
Physics
A plane can travel with a speed of 80 mi/hr with respect to the air. Determine the resultant velocity of the plane (magnitude only) if it encounters a: 10 mi/hr cross wind; 60 mi/hr cross wind; 10 mi/hr tailwind; 10 mi/hr headwind. I have no idea what
asked by Oleg 
Eligugu high school physical science
A cannon with a mass of 10 tons fires a bullet horizontally with a mass of 50kg. The velocity of the bullet when it leaves the barrel of the cannon is 800 m / s. calculate the recoil velocity of the cannon.
asked by Mandla 
Combinations and Permutations
A committee of 3 members is selected from a club made up of 10 junior members and 20 senior members. What is the expected number of juniors in the committee?
asked by Charles 
physics
A curved road is banked at an angle such that friction is not necessary for a car to stay on the road. a 2500 kg car is traveling at a speed of 25 ms and the road has a radius of curvature equal to 40 m. calculate the magnitude of force that the road
asked by amelia 
Calculus
Finding critical numbers g(theta) = 16(theta)  4tan(theta) I can only get the derivative of g to be g'(theta) = 16  4sec^2(theta). Am I supposed to move on to get sec^2(theta) = 4, then sec(theta) = 2?
asked by Justin 
math
He spent $48 on art supplies. The canvas for each of his paintings is an additional $2. He plans to sell his paintings for $10. Find the number of paintings (p) he will need to sell to break even.
asked by brandon 
Physics
John has used a solar simulator setup to measure the relation between the voltage and the current of a small photovoltaic module (40 cm long and 40 cm wide). The measurement setup maintains the standard measurement conditions: the temperature is controlled
asked by Prasad 
Finance
A business opportunity has presented itself to you and one of your classmates. Your opportunity is to enter the fast growing craft beer industry. Your projected sales in the first year is 8300 kegs. Your projected growth rate is 5 percent. Entering the
asked by Jimmy 
physics
I need help understanding these, please. Thanks! 1. A 2 kg body moves with constant velocity when a force of 10 N is applied. What is the coefficient of kinetic friction between the table and the body? (Would I use F=m*g for this??) 2. Which of the
asked by Ellie 
chemistry
What is the conjugate acid for NH2 ? N3 NH2 NH4+ H+ I thought it was NH4+ but it was wrong. Isn't it suppose to be NH3+ but they don't have on this choices.
asked by kris 
math
Bacteria in a certain culture increase at a rate proportional to the number present. If the number doubles in one hour, how long does it take for the number to triple?
asked by rama krishna 
Calculus
Differentiate. g(x) = 5e^x√x
asked by Joey 
PHYSICS
Two skaters, a man and a woman, are standing on ice. Neglect any friction between the skate blades and the ice. The mass of the man is 88 kg, and the mass of the woman is 58 kg. The woman pushes on the man with a force of 56 N due east. Determine the
asked by Anonymous 
physics
An athlete executing a long jump leaves the ground at a 28.9 ∘ angle and travels 7.70 m .What was the takeoff speed?If this speed were increased by just 4.0%, how much longer would the jump be?
asked by alex 
Math
Which of the following are necessary to describe a rotation of a figure on a coordinate plane ? A.the center of rotation B.the shape of the figure C.the number on of degrees of the rotation D.the direction of the rotation Is the answers A and C? thank you
asked by LoveMuffin 
Econ
Whenever an industry fails to achieve allocative efficiency by producing too little output, a shortage arises.
asked by Anonymous 
chemistry
The equations for the heats of the formation of copper (I) oxide,Cu2O and copper(II) oxide,CuO are: 2Cu(s) +1/2 O2(g) CuO(s); ∆Hof =166.7kj/mol Cu(s) +1/2 O(g) CuO(s); ∆Hof= 155.2kj/mol The first and second ionisation energies of copper are 750 and
asked by felix 
Chemistry
If 75.0 g of metal at 75.0 c is added to 135 g of water at 15 c the temp of water rises to 18.3 c what is the specific heat of the metal..? Can someone please help me plug the #s into the specific heat formula I'm very confused as to were to plug these #s
asked by Abby 
math 6th grade
At basketball practice, Kyla made 60 free throws. this was 80% of her attempts. how many free throws did Kyla attempt?
asked by alyson 
chem
a) Co(H2O)6^2 + 4 Cl^‐1 (aq) ⇄ CoCl4^‐2 (aq) + 6 H2O (l) Rewrite the net ionic equation above including the energy term where appropriate. The Delta H for this reaction is +50 kJ/mol. b) Silver chloride (AgCl) is a white solid. For the equilibrium
asked by Victor 
chemistry
acetylsalicylic acid (aspirin) HC9H7O4 is the most widely used pain reliever and fever reducer. Find the PH of 0.040 M aqueous aspirin at body temperature (Ka at 37 C = 3.6 x 104) is this correct? initial concentration is 0.040 M. let change in
asked by patrick 
Physics
A plane head north with an airspeed of 420 km/h. However, relative to the ground, it travels in a direction 7.0 west of north. if the wind's direction is towards the southwest (45.0 south of west), what is the wind speed?
asked by JHM 
PreCalculus
Venus orbits the sun in an approximately circular path. Venus is about 67 million miles from the sun. A comet is located 80 million miles north and 73 million miles west of the sun. The comet follows a straightline path and exits Venus's orbit at the east
asked by Anonymous 
physics
A 3000kg truck needs a propeling steady force of 1400 N to travel at a speed of 40 mpg. What is the MPG for the truck if its engine efficiency is 27%? Heat released from one gallon=136,500,000 J and 1 m= 1609 m.
asked by Penny 
Biology
Evolution by artificial selection is a common way by which people breed plants and animals to have characteristics that we find desirable. Imagine that you are working in a lab where scientists are trying to breed a strain of apple that has much higher
asked by Anonymous 
Organic Chem 2
Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment
asked by Peter 
Organic Chemistry
Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment
asked by Peter 
Ochem
Write the equation for the reaction that occurs when sodium carbonate is added to the mixture of the reaction and water (hint: a gas is evolved). This is for benzocaine experiment
asked by Peter 
Science
CaCo3 _____ CaO+CO 2 From this eqn caculate the amount of Carbon dioxide in grams liberated by heating 25g of calcium carbonate ?
asked by Amaresh S Patil 
Physics
A horizontal rifle is fired at a bull'seye. The muzzle speed of the bullet is 660 m/s. The gun is pointed directly at the center of the bull'seye, but the bullet strikes the target 0.027 m below the center. What is the horizontal distance between the end
asked by Hannah 
Chemistry
Write the dissociation equation for iron(II) ammonium sulfate hexahydrate in water . Fe(NH4)2(SO4)2 * 6H2O > __?________ I know dissociate means to take apart so for example; NaCl would look like Na^+ + Cl^ And another one like: Fe2(SO4)3 would look
asked by Christine 
trigonometry
A line AB, 125 feet long, is measured along the sraight bank of a river. A point C is on the opposite bank. Angles ABC and BAC are found to be 65° 40' and 54° 30' respectively. How wide is the river?
asked by shyiah 
orgo lab
when is it better to use recrystallization vs. sublimation techniques in lab? I know they both result a purer compound, but I am confused on when one technique is better than the other.
asked by domo 
chemistry
How many moles of H3O+ or OH must you add per liter of HA solution to adjust its pH from 9.75 to 9.01? Assume a negligible volume change. ……….x 10………Moles of ……………………..h3O+ or OH I got 4.6001 x 105 M of h3o+...but it was
asked by patrick 
chemsitry
acetylsalicylic acid (aspirin) HC9H7O4 is the most widely used pain reliever and fever reducer. Find the PH of 0.040 M aqueous aspirin at body temperature (Ka at 37 C = 3.6 x 104) is this correct? initial concentration is 0.040 M. let change in
asked by patrick 
Eligugu high school science
5 kg of steel is immersed in water at 2 degrees Celsius. what mass of water is required if the final temperature is 40 degrees Celsius?
asked by Mandla 
Physics
A galvanometer needle deflects full scale for 53.0A current. What current will give fullscale deflection if the magnetic field weakens to 0.860 of its original value?
asked by gaopalelwe 
math
The energyseparation curve for two atoms, a distance, r, apart is: U(r)=−A/r^m+B/r^n Derive and expression for the stiffness of the bond at the equilibrium spacing, in terms of A, B, m, n, and r0. S=dF/dr at r=r0:
asked by ana 
Chemistry
With relation to Avogadro's Constant: How many hydrogen ions are present in 3 moles of dilute sulphuric acid? As sulphuric acid is H2SO4, I'm not sure whether the answer is: 2 x 6 x 10(23) = 1.2 x 10(24) OR 6 x 6 x 10(23) = 3.6 x 10(24) Thank you!
asked by Maria 
Chemistry
Suppose you dilute 20.0 mL of a 0.130 M solution of Na2CO3 to exactly 100.0 mL. You then take exactly 15.0 mL of this diluted solution and add it to a 250mL volumetric flask. After filling the volumetric flask to the mark with distilled water (indicating
asked by Julian 
chemistry
6.3E7 cm converted to mm would be 4.3cm converted to in would be
asked by steph 
chemistry
6.3E10 Mm converted to mm would be? Round the following measurment to three significant figure: 0.90985 cm^2
asked by HELP! 
chemistry
The weak acid HQ has pKa of 4.89. Calculate the (OH) of 0.500 M HQ This is what I have: pKa = 4.89 so Ka = 10^4.89 = 1.29x10^5 Ka = 1.29x10^5 = [H+][Q] / [HQ] 1.29x10^5 = x^2 / 0.046  x x^2 + 1.29x10^5x  5.93x10^7 = 0 x = [H+] = 7.64x10^4M pH =
asked by patrick 
algebra
enum =5 four=2 three= 1 suppose the function f is defined, for real numbers, as(x) follows f{4if=0 1ifx=0 graph the function f
asked by Pat 
STAT
The Probability that a randomly selected commuter listens to audiobooks during their commute is 0.49. Suppose that a sample of 10 commuters is selected, what is the probability that at most 3 of them listen to audiobooks? Write only a number as your
asked by Anonymous 
Physics
At time t1 = 2.00 s, the acceleration of a particle in counterclockwise circular motion is (5.00 m/s2)i hat + (6.00 m/s2)j. It moves at constant speed. At time t2 = 5.00 s, its acceleration is (6.00 m/s2)i hat + (−5.00 m/s2)j. What is the radius of the
asked by Rach 
physics
a rocket launched off a cliff is represented by the equation h(t)= 16t^2+100t+140. when will this rocket reach 200 feet? I tried to factor it, i'm confused.
asked by angel 
Chemistry
Compare the rate of effusion of carbon dioxide with that if hydrogen chloride at the same temperature and pressure.
asked by Cade 
sinking
Find the periodic payments PMT necessary to accumulate the amount given in a sinking fund. HINT [See Example 2.] (Assume endofperiod deposits and compounding at the same intervals as deposits. Round your answer to the nearest cent.)
asked by joe 
Biology
Is the oval window soft or hard? Explain the advantage to your answer Personally I think it's soft and it's because being soft would it to be amplified to the ear hear things more clearly. Explain why a person with a sore throat may end up with a mild ear
asked by Alex 
Ecology & English
I am writing my answer and my teacher wants me to give an example of parasitism and write a sentence explaining my answer. Is this a good answer also should I keep the semicolon or change it. Sentence: Wolves and deer; The deer are hunted and killed by the
asked by Fairypenguingirl 
PreAlgebra
Ashley bought a dress at 30% off. The sale price was $59.50. What was the original price of the dress?
asked by Coolkid101 
Social Studies
Who were the first Early American civilization to build stone pyramids? A)Maya B)Olmec C)Aztec D)Inca I think it's Maya :p
asked by Shalee ^~^ 
Biology
Compare and contrast natural selection and artificial selection. All I can think of is that man controls what happens in artificial selection.
asked by Anonymous 
Physics
A stone is thrown up and returns to it's starting point 6 second later. Find the stone's initial speed.
asked by Mike 
Physics
A boy throws a ball straight up into the air so that it leaves his hand at 11 m/s. If the ball has mass 0.15 kg and the boy's arm moved through 1.5 m as he threw the ball, then what average force did he exert on the ball? I'm completely confused. I looked
asked by John Scott 
Physics
An 80 kg man stands in an elevator. What force does the floor of the elevator exert on the man if a) the elevator is stationary? b) the elevator accelerates upward at 2 m/s2? c) the elevator rises with constant velocity 4 m/s? d) while rising, the elevator
asked by John Scott 
Chemistry
Calculate the amount of heat (calories) needed to raise the temp of 10.0g of water from 10.0 c to 75.0 c ??
asked by Anonymous 
math221
consider situations in your work or home that could be addressed through a continuous probability distribution. Describe the situation and the variables, and determine whether the variables are normally distributed or not. How could you change these to a
asked by Faithee 
Math
 2 1/4 cups all purpose flour  1 teaspoon of backing soda  1 teaspoon of salt  1 cup (2 sticks) of butter softened  3/4 cups of sugar  3/4 cup of packed brown sugar 1 teaspoon of vanilla extract 2 large eggs 2 cups of chocolate chips 1 cup of
asked by Brenda 
Science
1. Which component of the technological system is achieved when an automobile airbag inflates? A. Input B. feedback C. process D. output I think the answer is D. Output. Possibly C. Process. Please help. It will be greatly appreciated. Thank you for your
asked by BabyCakes101 
PreCalculus
Not sure what to solve... I tried to solve it but i ended up proving that it worked. a. Find the equations of the tangents at C (2,1) and D (1,2) on the circle x^2+y^2=5 b. Find the point of intersection of the tangents. ~What I did was find the slope and
asked by Anonymous 
Calculus
Calculate the approximation. L4, f(x)=cos^2 x , [pi/6, pi/2]
asked by Anonymous 
Physics
A person 1.90 m tall walks on a horizontal icy surface. The coefficient of friction between the surface of the ice and the person's shoe sole is μ = 0.33 and the length of the person's legs are 1/2 of the person's height. Determine the maximum step length
asked by Jacob 
Physics
A sports car skids to a stop, leaving skid marks 290 m long. If the coefficient of kinetic friction between tires and pavement is 0.80, how fast was the car going before the skid?
asked by Luis 
Distributed Management System
what is the crow's foot ERD of this problem?
asked by Karen 
Algebra 1
The manager of a band recommends that the band sell its CDs for $8.75. The band decides to sell the CD for p dollars. A) Write an absolute value expression that tells how far the bands price is from the recommended price. B) The band wants the price of its
asked by Ellie 
Algebra
a). The length of the classroom is 30 ft. The length of the room on the scale drawing is 6 in. Is this correct? Explain why or why not. Michael has made a scale drawing of his classroom. The scale for his drawing is 0.5 in. : 3 ft. b). One of the student
asked by Alyssa 
Algebra
If the angles of triangle are in the ratio of4:1:1then find the ratio in the smallest side / perimeter of the tringle
asked by Math 
Algebra
A man flies between two cities; on a windless day, he averages 120 mph round trip; on a windy day he averaged 140 mph with the wind; he averaged 100 mph against the wind; on the windy day, it took 15 extra minutes to make the round trip; what is the
asked by Linda 
Statistics
If 12 women are randomly selected, what is the probability that their mean head circumference is between 21.8 in and 22.8 in.? If this probability is high does it suggest that an order of 12 hats will very likely for each of 12 randomly selected women? Why
asked by Kacey 
History
The core periphery model is not limited to a global scale Explain What does that mean
asked by Anonymous 
math
If Sally can paint a house in 4 hours, and John can paint the same house in 6 hours, how long will it take both of them to paint the house together? > I know the answer, but I do not know what is the name of the methods. EX: 1/n= 1/4 + 1/6 1/n =5/12 n=
asked by Mohammed 
math
Information:Juan plans to bulid a bookcase to store his paperback books DVDs and CDs he has lumber that he will use for the sides and back of the bookcase the bookcase will have 5 shelves in each shelf will be two and a half feet long Question: juan bought
asked by help 
Chemistry
The world’s electrical demand is typically 1.4 x 10^13 W. If all the H2O(g)in the atmosphere suddenly condensed to liquid, and all the enthalpy of this process was captured and converted to electrical energy, for how long would this energy power the
asked by Anonymous 
chemistry
6.3E10 cm converted to ft would be
asked by NEED HELP PLEASE 
Chemisrty
What volume of 0.740 M , HCl in milliliters, is required to titrate 2.05 g of Na2CO3 to the equivalence point?
asked by Julian 
Grammar English
How would you change this sentence The infant was handed to the pediatrician, who then cried spontaneously.
asked by Sharon 
Chemistry
2 NaIO3(aq) + 5 NaHSO3(aq) → 3 NaHSO4(aq) + 2 Na2SO4(aq) + H2O(ℓ) + I2(aq) What is the theoretical yield of I2 if you mixed 16.0 g of NaIO3 with 120 mL of 0.853 M NaHSO3?
asked by Julian 
math
7x3y+4z=18 13x+6y+8z=30 11x9y12z=16 Find x,y,z please show the solution pleaseee
asked by Jean 
math
Evaluate x+4y when x=4/5 and y=1/3. Write your answer as a fraction or mixed number in simplest form.
asked by Anonymous 
PHYSICS
The space probe Deep Space 1 was launched on October 24, 1998. Its mass was 474 kg. The goal of the mission was to test a new kind of engine called an ion propulsion drive. This engine generated only a weak thrust, but it could do so over long periods of
asked by Anonymous 
math
Evaluate 2x+6y when x=4/5 and y=1/3. Write your answer as a fraction or mixed number in simplest form.
asked by Anonymous 
Physics
A quarterback throws a pass at an angle of 40 degrees above the horizontal with an initial speed of 20 m/s. The ball is caught by the receiver 2.55 seconds later. Determine horizontal velocity, vertical initial velocity, the distance ball was thrown, and
asked by Jose Luis 
Chemistry
You place a piece of paper on a balance and find that its mass is 0.63 g. You add a lump of NaOH to the paper and get a mass of 22.21 g. You remember that you forgot to tare the balance before taking this measurement. You tare the balance, add another lump
asked by Misaki 
Biology
You place a piece of paper on a balance and find that its mass is 0.63 g. You add a lump of NaOH to the paper and get a mass of 22.21 g. You remember that you forgot to tare the balance before taking this measurement. You tare the balance, add another lump
asked by Misaki 
Accounting 2
Coldfoot Corp. estimates that its 201 income tax will be $74,000. Based on this estimate, it will make four quarterly payments of $18,500 each on April 15, June 15, September 15, and December 15.
asked by Norman A George 
science
Two converging lenses are separated by 50 cm, and have focal lengths of f1 = 20 cm and f2 = 10 cm, as illustrated in Figure 2. An object is placed on the left of Lens 1. The final image formed by the two lenses is located at 26.0 cm to the right of Lens 1.
asked by Anonymous 
English
What is the archetype in By the Waters Of Babylon for The Quest to Know who you are, with an example from the book
asked by John 
physical
Consider a compound microscope that has a minimum separation angle of 0.5 ¦Ìrad when it satisfies the ¡®just resolved¡¯ condition. When its objective lens with a circular aperture is immersed in oil whose refractive index is 1.53, determine the
asked by Anonymous 
English help
"We can easily forgive a child who is afraid of the dark; the real tragedy of life is when men are afraid of the light" what does this quote mean?
asked by Hanna 
Algebra 2
Evaluate 41.5 using a calculator. Round you’re answer to 3 decimal places
asked by Sara 
Physics
A spider crawling across a table leaps onto a magazine blocking its path. The initial velocity of the spider is 0.890 m/s at an angle of 36.0° above the table, and it lands on the magazine 0.0660 s after leaving the table. Ignore air resistance. How thick
asked by Hannah 
Chemistry
How many grams of iron at 200.0 c must be placed in 200.0 g of water at 18.0 c so that the temp of both will be 30.0 c ? Okay so the SH of iron = .106 This is what I have set up.. Not sure if I'm going at this the right way.. (.106) (m) (170.0) = (1.0)
asked by John 
Chemistry
I'm having trouble understanding hybrid atomic orbitals. Could you please explain? Thanks
asked by Anonymous 
4
Bobby has 230 marbles to put in jars. He wants the jars to hold either 100 marbles or 10 marbles. Which is a way he can arrange the marbles?
asked by ben 
algebra
graph the function f(x)=ãx2 graph the function leftmost point and three additional points
asked by Pat 
chemistry
how many rb atoms could be placed on a square surface that is 1.0cm on a side? The diameter of a rb atom is 4.95
asked by linda 
physics sl
A dead dog of mass 2.2 kg and an initial speed of 5.5 m.s1 slides along a rough horizontal surface and stops after travelling 4.2 m. calculate the frictional force between the dog and the surface (Think of the work the friction has to do to stop the dog
asked by samuel 
Physics
If you kick a football at 64.7 m/s at 49 degrees? a) How long is the ball in the air? b) Where does the ball land horizontally? c) What is the balls vertical acceleration at the top of its flight?
asked by Ghazi 
English assignment
We have to write a one page reflection on honesty, I need help. What are some real world situations in which this value is being violated? What actions does your conscience call you to take to respond to real world situations in which this value is being
asked by Bob 
Math
4x−y+2z=11 x+2y−z=−1 2x+2y−3z=−1 can someone help me find x,y,z, I have tried isolation but i cant seem to get it
asked by Adam 
Quality Control
How need help with this one. This is what I know P(X)
asked by WIlbert 
AP Calculus AB
Hello! I'm having trouble with this related rates problem: A 5ft tall person is walking away from a 16ft tall lamppost at a rate of (2/x) ft/sec, where x is the distance from the person to the lamppost. Assume the scenario can be modeled with right
asked by Andy 
Physics
A small plane aims to fly directly east at 120. km/h, but a headwind is blowing 50. km/h at 22 degrees south of west, slowing the plane down. Find the plane's actual ground speed and direction.
asked by brooklyn 
math
At a car rental agency, 0.34 of the cars are returned on time. A sample of 13 car rentals is studied. What is the probability that more than 3 of them are returned on time? Write only a number as your answer. Round to 2 decimal places ( for example: 0.24).
asked by Anonymous 
physics
A rock is dropped from a tree of height 22 m into a lake (depth 4.0 m) below. After entering the water, the rock floats gently down through the water at a constant speed of 1.4 m/s to the bottom of the lake. What is the total elapsed time?
asked by julia 
Social Studies
which of the tive themes includes the human and physical features at a specific location
asked by Jack 
PHYSICS
A 50.5kg crate rests on a level floor at a shipping dock. The coefficients of static and kinetic friction are 0.624 and 0.364, respectively. What horizontal pushing force is required to (a) just start the crate moving and (b) slide the crate across the
asked by Anonymous 
math
A heated piece of metal cools according to the function c(x) = (.5)x − 11, where x is measured in hours. A device is added that aids in cooling according to the function h(x) = −x − 3. What will be the temperature of the metal after five hours?
asked by dalton 
Algebra
A miniature rocket is launched so that its height in meters after t seconds is given by the equation h=4.9t^2+29.4t+7. (a)draw a graph of the equation (b)how high is the rocket after 5 seconds? (c)what is the maximum height the rocket will attain? (d)how
asked by Amy 
PHYSICS
A 103kg baseball player slides into second base. The coefficient of kinetic friction between the player and the ground is μk = 0.555. (a) What is the magnitude of the frictional force? (b) If the player comes to rest after 1.05 s, what is his initial
asked by Anonymous 
PHYSICS
Three forces act on a moving object. One force has a magnitude of 81.2 N and is directed due north. Another has a magnitude of 47.9 N and is directed due west. What must be (a) the magnitude and (b) the direction of the third force, such that the object
asked by Anonymous 
Chemistry
Write the dissociation equation for iron(II) ammonium sulfate hexahydrate in water . Fe(NH4)2(SO4)2 * 6H2O > __?________ I know dissociate means to take apart so for example; NaCl would look like Na^+ + Cl^ And another one like: Fe2(SO4)3 would look
asked by Christine 
Chemistry
What is the balanced net ionic equation for the reaction between the permanganate ion and the ferrous ion in acid solution. What is the number of moles of ferrous ion that could be oxidized by 1.2×10^2 moles of permanganate ion? Honestly don't understand
asked by Minset 
English
How would you fix this sentence? The patient resides in a nursing home, which toppled over resulting in a broken hip.
asked by Lyx 
Chemistry
How would you write the equation to represent "Nitrogen and Oxygen react to form Nitrogen Dioxide".
asked by Elle 
Math
Evaluate the following limit algebraically. lim (sqrt 4+x2)/x x approaches 0
asked by Levi 
psychology
what are a type of order effect that occurs when participants’ performance decreases over time due to repeated testing
asked by lionel 
math
I need the order from least to greatest 4/9 5/6 1/2 2/3
asked by talia 
English
How would you fix this sentence? He passed about a cup of bright red blood per rectum, which brought him to the emergency room.
asked by Lyx 
geometry
The length of a rectangle is 4 times its width. If the perimeter of the rectangle is 70 ft., find the area.
asked by Christine 
Calculus
We are finding critical numbers f(x)= 8x^3+x^2+8x f'(x)=24x^2+2x+8 > 2(12x^2+x+4) I'm honestly stuck. All I can tell is that I need to set my f'(x)=0, but I am lost there too. Quadratic form. equates to (1±i√191)/24 I believe. That is as far as I can
asked by Justin 
Calculus
We are finding critical numbers f(x)= 8x^3+x^2+8x f'(x)=24x^2+2x+8 > 2(12x^2+x+4) I'm honestly stuck. All I can tell is that I need to set my f'(x)=0, but I am lost there too. Quadratic form. equates to (1±i√191)/24 I believe. That is as far as I can
asked by Justin 
Calculus
We are finding critical numbers f(x)= 8x^3+x^2+8x f'(x)=24x^2+2x+8 > 2(12x^2+x+4) I'm honestly stuck. All I can tell is that I need to set my f'(x)=0, but I am lost there too. Quadratic form. equates to (1±i√191)/24 I believe. That is as far as I can
asked by Justin 
zambia school
500ml of gas at 20 degrees celcius is under a pressure of 100cm of mercury what would be its volume at s.t.p?
asked by Natalia 
Physics
A mass hangs on the end of a massless rope. The pendulum is held horizontal and released from rest. When the mass reaches the bottom of its path it is moving at a speed v = 2.4 m/s and the tension in the rope is T = 15.5 N. A peg is placed 4/5 of the way
asked by Hannah 
factors
Lucy has 40 bean plants, 32 tomato plants, and 16 pepper plants. she wants to put the plant in rows with only one type of plant in each row. All rows will have the same number of plants. How many plants can Lucy put in each row
asked by Anonymous 
ap chemistry
The weak acid HQ has pKa of 4.89. 1)Calculate the [H3O+] of .035 M HQ. 2)Calculate the (OH) of 0.500 M HQ ....Am I correct? a) pKa = 4.89 =>  log(Ka) = 4.89 => Ka = antilog( 4.89) = 104.89 = 1.29x105 1. Given concentration of HQ, C = 0.035 M
asked by patrick 
Math
Find the product tell which strategy you for (4x10)x10
asked by Emmya