Questions Asked on
November 15, 2015

Math
1. Write the ratio in the simplest form. 50:10 (a) 25:5 (b) 10:2 (C) 5:1* (D) 1:5 2. Solve the following proportion. p/6=7/8 (a) p=5.25 (b) p=8 (c) p=10.5* (d) p=42 3. Chris's uncle has a model car. The model is 6 inches long and 3 inches wide. The actual
asked by Anonymous 
Science: Chemistry
Pentane (C5H12) burns in oxygen to produce carbon dioxide and water. C5H12(g)+8O2(g)→5CO2(g)+6H2O(g) Calculate the mass of CO2 that can be produced if the reaction of 38.5 g of pentane and sufficient oxygen has a 58.0 % yield.
asked by Alex 
math
An aeroplane flies due north from Ikeja Airport for 500km. It then flies on a bearing of 060 degrees for a further distance of 300km before overflying a road junction.Calculate a. The distance of the aeroplne from Ikeja Airport when it was directly above
asked by Anonymous 
Algebra
I NEED HELP A$AP, PLEASE! I don't understand how to do this :( I have to draw a short roller coaster on graph paper Directions: 1. Draw the side view of your roller coaster on graph paper. For the sake of simplicity, assume that your roller coaster track
asked by Milana 
math
Given that p2q over p+2=3q ,express q in terms of p. The answer is C. p over 3p+8 I cant get the steps..help me
asked by Agnes 
math
The track team plans to sprint 20 miles this school year. The runners will sprint 1/4 mile each day.How many days will it take them to sprint 20 miles?
asked by sarah 
AP physics 1
an astronaut on a space walk discovers that this jet pack has no longer works, leaving him stranded 50m from the spacecraft. If the jet pack is removable, explain how the astronaut can still use it to return to the ship?
asked by lakpa 
Physics
if your plane is flying 25° north of east at the speed of 820 kg per hour how fast is it moving to the north?
asked by Karlie 
Chemistry
10000 tonnes of iron reacted in a blast furnace Fe2O3 calculate the typical mass of iron produced each day
asked by Anonymous 
PLEASE I NEED HELP MS SUE
in the heart blood flows from the right atrium to the right ventricle where it is pumped to the ______ openstudy
asked by Anonymous 
Geometry
In the figure, square WXYZ has a diagonal of 12 units. Point A is a midpoint of segment WX, segment AB is perpendicular to segment AC and AB = AC. What is the length of segment BC?
asked by Aditi 
Chemistry
A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown acid?
asked by Jorge 
Algebra 1
The width of a rectangular prism is 30cm. This is 12 more than onefourth of the length. Find the volume of the prism, given the height is 20cm.
asked by JRCampbell 
Physics
A train can deccerate at 0.4 m/s. It's traveling at 160km/hr. How far in advance should it apply brakes to come to a full stop.
asked by Jas 
Reading/Language Arts
POEM: The Grammar Of Silk by Cathy Son Lines 1926: "Seamstresses waited at counters like librarians to be consulted. Pens and scissors dangled like awkward pendants across flat chests, a scarf of measuring tape flung across a shoulder, time as a
asked by John Doswell 
Physics
A roller coaster reaches the top of the steepest hill with a speed of 7.0 km/h . It then descends the hill, which is at an average angle of 44 ∘ and is 30.0 m long. Estimate its speed when it reaches the bottom. Assume μk=0.18.
asked by Emily 
Chemistry
Calculate the standard enthalpy change for the reaction 2A+B⇌2C+2D Use the following data: Substance ΔH∘f (kJ/mol) A 251 B 403 C 213 D 511 My thoughts: [(2)(511)+(213)(2)][(2)(251)+(403)]=309kJ (but apparently that is not the correct answer)
asked by Miranda 
physics
An ECG monitor must have an RC time constant less than 100 μs to be able to measure variations in voltage over small time intervals. If the resistance of the circuit (due mostly to that of the patient’s chest) is 1000 Ω, what is the maximum capacitance
asked by carolyn 
PHYSICS
A BALL IS PROJECTED VERTICALLY UPWARD FROM THE TOP OF A TOWER 60MITRE HIGH WITH A VELOCITY OF 30MITRE PER SECONDS.WHAT IS THE MAXIMUM HEIGHT ABOVE THE GROUND LEVEL?HOW LONG DOES IT TAKE TO REACH THE GROUND?
asked by Anonymous 
statistics
The time needed to complete a final examination in a particular college course is normally distributed with a mean of 79 minutes and a standard deviation of 8 minutes. Answer the following questions. Assume that the class has 60 students and that the
asked by margaret 
English
6.)Which of the following sentences contains a verb that is correctly formed in the perfect tense? a.)Susan is spoken at our club before. b.)Desmond has love swimming in the ocean. c.)Desmond has love swimming in the ocean. d.)Jake have painted his room
asked by Cami 
Algebra
A family earns $1800 a month. The family's expenses are at least $1250. Write and solve an inequality to find the possible amounts the family can save each month.
asked by Zero 
pre algebra
Wren bought a baseball card last year for $2.25. This year the price dropped to $.45. What was the percent of decrease in the price of the card A. 120% B. 500% C. 80% D. 400% A?
asked by Andria 
Math
The annual real estate tax on a duplex house is $20,913 and the owner sell the house after 9 months of the tax year. How much annual tax will the seller pay? How much tax will the buyer pay?
asked by Ms. Roberts 
physics
An airplane is travelling at a speed of 600 mph on a heading of 345 degrees. There is a wind moving at a speed of 70 mph on a heading of 20 degrees. The pilot would like to maintain his planned course. Find the speed and heading he should set in order to
asked by johnny 
Science: Chemistry
How many kilojoules are released when 115 g of Si reacts with chlorine? Si(s)+2Cl2(g)→SiCl4(g)ΔH=−657kJ
asked by Alex 
Social Studies
Why did the English establish colonies in the Americas? The English established colonies in the Americas because the King of England wanted to bring the people that didn't celebrate the same religion their own community. He allowed them to spread their own
asked by Abbie 
Physics
A car starts rolling down a 1in6 hill (1in6 means that for each 6 m traveled along the road, the elevation change is 1 m). How fast is it going when it reaches the bottom after traveling 70 m ? Assume an effective coefficient of friction equal to 0.10
asked by Emily 
Chemistry
A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown acid?
asked by Jorge 
Chem
A gas has density of 1.977 g/dm3 at STP (a) what is its molecular mass? (b) what is its density at 77¢XC and 0.95 atm pressure? (c)If the gas is an oxide and has the formula XO2, what is the atomic mass of X
asked by Janice 
Physics 1
A car manufacturer claims that you can drive its new vehicle across a hill with a 47 degree slope before the vehicle starts to tip. If the vehicle is 2.0 meter wide, how high is its center of gravity?
asked by Chris 
precal : conics
a parkway 80 ft. wide is spanned by a parabolic arc 100 ft. long along the horizontal, if the parkway is in the center, how high must the vertex of the arch be in order to give a minimum clearance of 20 over the parkway?
asked by rhinechilde 
Chemistry 102
The average human body contains 6.00 L of blood with a Fe2+ concentration of 2.00×10−5 M . If a person ingests 6.00 mL of 16.0 mM NaCN, what percentage of iron(II) in the blood would be sequestered by the cyanide ion?
asked by Kyle 
physics
When a wood shelf of mass 7.2 kg is fastened inside a slot in a vertical support as shown in (Figure 1) , the support exerts a torque on the shelf. Assume that the slot exerts two vertical forces on the shelf, at points A and B. Detrmine the force exerted
asked by Anonymous 
Chemistry
Which molecule contains a polar covalent bond? a)C2H4 b)ZnS c)LiI d)NBr3 e)AgI
asked by Mark 
Physics
Determine the velocity of the Hubble deep space telescope while it is in orbit at a height of 598 km (5.98 x 105 m) above the earth’s surface. The earth’s radius is approximately 6.4 x 106 m. The mass of the earth is 6.0 x 1024 kg.
asked by Smit 
Physics
Compare the maximum speeds at which a car can safely navigate a flat, unbanked turn of radius 50.0 m in dry conditions versus snowy conditions. The coefficient of static friction in dry weather is 0.90, and in snowy weather it is 0.10. So, find the maximum
asked by Smit 
Chemistry
1. A hypothetical pure element consists entirely of two isotopes. The natural percent abundance of the isotope with mass 25.5 u is 86.1%. The other isotope has mass 29.2 u. Calculate the atomic weight of the naturally occurring element. 2. Suppose that a
asked by Melissa 
physics
When a wood shelf of mass 7.2 kg is fastened inside a slot in a vertical support as shown in (Figure 1) , the support exerts a torque on the shelf. Assume that the slot exerts two vertical forces on the shelf, at points A and B.
asked by Anonymous 
Social Studies
1.) the first successfully established English colony in North America was a.) Plymouth b.) New York c.) Jamestown d.) Santa Fe 2.) protestants who wanted to reform the anglican church were called a.) pilgrims b.) puritans c.) plymouthians d.) priests 3.)
asked by Abbie 
Calculus 1
Consider the function below. f(x)= (x^2)/((x4)^2) Find the interval where the function is concave up. (Enter your answer using interval notation.) Find the intervals where the function is concave down. (Enter your answers using interval notation.) For
asked by TayB 
Physics
A 1450 kg car goes over a vertical hill with a radius of 64.7 m. What is the maximum velocity that will keep the car on the road as it goes over the hill?
asked by Smit 
chemistry Dr BOB
In many residential water systems, the aqueous Fe3+ concentration is high enough to stain sinks and turn drinking water light brown. The iron content is analyzed by first reducing the Fe3+ to Fe2+ and then titrating with MnO4 in acidic solution. Fe2+(aq)
asked by Dalton 
Physics
a crane holds a 500kg wrecking ball in place using a wire with tension T1 and is horizontal to the ground. The crane swings it with a cable under tension T2. if the wire holds the ball in place so the cable forms a 20 degree angle with the vertical,
asked by Drew 
Chemistry
Given: PbSO4 + 2e− Pb + SO42− E° = 0.356 V PbO2 + 4H+ + SO42− + 2e− PbSO4 + 2H2O E° = 1.685 V Determine the cell voltage of the lead storage battery when the concentration of sulfuric acid is 4.00 M. Where do I start, thank you
asked by Anonymous 
language arts
El Niño is a change in how warm the ocean is. It happens when warm water from the Pacific moves eastward. No one knows why this happens. It takes place every four or five years and lasts for about a year. No two are the same. It can change the weather in
asked by jelena 
Physics
A man moves due north 6km then he moves 4km due west and then moves 4km southwards finally he moves 4km eastwards.Find his: total distance and displacement
asked by Nonso 
Chemistry
A 0.120 g sample of a diprotic acid of unknown molar mass is dissolved in water and titrated with 0.1218 M NaOH. The equivalence point is reached after adding 12.4 mL of base. What is the molar mass of the unknown substance?
asked by Jorge 
physics
A car travels 15km northwards. 5km eastwards, 10km southwards, and 5km westwards to arrive at point P. Find its total displacement
asked by Benny 
chem
What is the electron configuration for the aluminum ion? Phosphide ion? Do NOT use shorthand notation! My answer but when I input it I get it wrong why? Al: 1s^2,2s^2,2p^6,3s^2,3p^1 P: 1s^2,2s^2,2p^6,3s^2,3p^3
asked by Dan 
Calculus 1
Use Newton's method to approximate the indicated root of the equation correct to six decimal places. The root of x^4 − 2x^3 + 5x^2 − 5 = 0 in the interval [1, 2]
asked by TayB 
chemistry
A standard sodium carbonate solution is prepared in a 250 cm^3 volumetric flask during a titration,20 cm^3 of a 0,1 mol.dm^3 nitric acid solution neutralises 25 cm^3 of the above standard solution according to the following balanced equation 2HNO3(aq)
asked by alex 
Physics
A thin spherical shell of silver has an inner radius of 8.74 x 102 m when the temperature is 29.4 °C. The shell is heated to 145 °C. Find the change in the interior volume of the shell.
asked by Kevin 
Maths
Statistics The marks scored by a sample of 56 students are summarised by: N=56 Sum of x =3026 sum of(xthe mean)^2 =15378 A) calculate the mean and the standard deviation Mean I got  54.04 (2.dp) Standard deviation I got  16.72 (2.dp) Is this correct? B)
asked by Anonymous 
swagodimo
Calculate the number of moles of hcl(aq)added to sodium thiosulphate
asked by peter 
Science/Environmental Studies
What are some dependent variables for Global Warming?
asked by John Doswell 
Physics
A hockey skater turns in a circular path with radius of 31.0 m while going 10.5 m/s. If he experiences a centripetal force of 565 N, what is the mass of the skater?
asked by Smit 
math(quadratic equation)
Tom and Kathy together have 30 chocolates.Both of them lost 6 chocolates each,and the product of the number of chocolates now they have is 80.Find out how many chocolates do they have at the beginning.
asked by Agnes 
Chemistry Dr. BOB
In many residential water systems, the aqueous Fe3+ concentration is high enough to stain sinks and turn drinking water light brown. The iron content is analyzed by first reducing the Fe3+ to Fe2+ and then titrating with MnO4 in acidic solution. Fe2+(aq)
asked by Dalton 
Genatics
when designing a protocol to produce auxotrophs for biochemical pathways, how long should you irradiate yeast in this system to maximize the number of auxotrophic mutants? Explain your reasoning.
asked by Hiba 
Pre cal
A parallelogram has sides of lengths 7 and 4, and one angle is 55°. Find the lengths of the diagonals. (Round your answers to two decimal places. Enter your answers as a commaseparated list.)
asked by Karl 
Maths
A surveyor stands 200m from the base of a tower on which an Ariel stands. He measures the angle of elevation to the top and bottom of the Ariel as 58 degree and 56 degree. Find the height of the Ariel.
asked by Nongo 
college math
A survey indicated that 3 out of 5 doctors use brand x aspirin. If 2000 doctors were surveyed how many used brand x? please show me how to solve this ?
asked by LISA COLLEGE MATH 
Math
Sarah can type 225 words in five minutes. She then typed 135 words in three minutes. If sarah types for 24 minutes, how many words did she type? A. What is the answer? (I answered 1080) B. Explain what the constant of variation is in the problem. Write an
asked by Max 
math
The produce manager receives 5 containers of green beans, each weighing 7 pounds. She divides the total amount of green beans into 3 equalweight portions. What is the weight of the beans in each portion?
asked by teresa 
math
The digit 3 appears fourteen times in tye page numbers of Chapter 1 of a book.How manypages are there in Chapter 1 of the book?
asked by Gallia 
Physics
rotating space station has radius 1380 m, measured from the center of rotation to the outer deck where the crew lives. What should the period of rotation be if the crew is to feel that they weigh onehalf their Earth weight?
asked by Anonymous 
precal : conics
find the equation of a parabola with vertex on line y = 2x, axis parallel to the y axis and passing through (3/2, 1) and (3, 4).
asked by rhinechilde 
statistics
in a lottery, a player wins or shares in the jackpot by selecting the correct 6number combination when six different numbers from 1 through 49 are drawn. if a player selects one particular 6number combination, find the probability of winning the jackpot.
asked by safi 
Physics: Static Equilibrium
Consider the 667 N weight held by two cables shown below. The lefthand cable had tension 890 N and makes an angle of θ with the wall. The righthand cable had tension 960 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the
asked by Adrian 
math
when james planted a tree 5 m from a window the tree just blocked from view a building 50 m away if the building was 20 m tall how tall was the tree?
asked by lucy 
language arts
El Niño is a change in how warm the ocean is. It happens when warm water from the Pacific moves eastward. No one knows why this happens. It takes place every four or five years and lasts for about a year. No two are the same. It can change the weather in
asked by lana 
Physics
If the magnetic field in a traveling EM wave has a peak value of 17.9nT, what is the peak value of the electric field strength?
asked by Anonymous 
math
Consider the line 4x +3y= 12 a.) Solve the equation for y b.)State the slope of the line c.)State the y intercept Show all working.
asked by kkj 
math
one half of what john's age was 4 years ago is equal to on of thrid of what it will be in 5 years time.How old is john now
asked by lili 
Analytical Chemistry
I have a 0.00156 M solution of CuSO4*5H2O in water (from 0.0398 g of CuSO4*5H20 in 100 mL of water). How would I calculate the ppm of Cu of that solution from that information?
asked by Ronnie 
Language Arts
Which of the following correctly revises the the sentence so that it is entirely in active voice? A. It has been decided by the school at the regular teacher should not evaluate the class; instead, the assessment should be performed by a visiting scholar.
asked by Danielle 
pre calculus
find 2 solutions of tan θ=.6524 in both degrees and radians. I know the answer are 33.12 degrees/.578 radians and 213.12 degrees/3.72 radians, but how do you find this? Thanks!!!!
asked by elle 
College Algebra
The students in a political science class are divided up into three categories: liberal, conservative, or moderate. There are five more conservatives than moderates, and twice as many liberals as conservatives. How many of each type are there if there is a
asked by Test 
precal : conics
locate the center, foci, vertices,ends of the latera recta and draw the conic. Compute the eccentricity and equation of the conic. 1) 5x^2 + 2y^2 = 100 2)y^2  2x  8y + 10 = 0
asked by rhinechilde 
Chemistry
A student performed an experiment to determine the molecular weight of a gaseous compound. Using the ideal gas law PV = nRT, and knowing the pressure, temperature, and volume of the vapor, the student calculated the number of moles of gas, n, to be 0.0443
asked by Ericka 
physic
you are standing on the edge of a frozen pond next to the tree. you decide that you need to get away from the bear by backing up out onto the ice, but the ice is so slippery you can't get any traction and assume the friction between you and the ice is
asked by ct scan 
algebra
find the domain of f give the function of f(x)=square root x+5
asked by lonnie 
math
translate 16 less than the quotient of a number and 7 equals 3
asked by tp 
Maths
Statistics The marks scored by a sample of 56 students are summarised by: N=56 Sum of x =3026 sum of(xthe mean)^2 =15378 A) calculate the mean and the standard deviation Mean I got  54.04 (2.dp) Standard deviation I got  16.72 (2.dp) Is this correct? B)
asked by Anonymous 
Physics
Consider the 667 N weight held by two cables shown below. The lefthand cable had tension 890 N and makes an angle of θ with the wall. The righthand cable had tension 960 N and makes an angle of θ1 with the ceiling. a) What is the angle θ1 which the
asked by Adrian 
calc 2
A spherical tank of radius a feet is buried in the ground. The top of the tank lies b feet below the surface of the ground.(δ=64lbs/ft^3)Find a definite integral whose value equals total work done in emptying the tank through a pipe whose opening is at
asked by josh 
Quadratic Functions Applications
1. The distance, d(t), fallen by a freefalling body is represented by d(t)+vt0.5gt^2, where v is initial velocity and g is acceleration due to gravity. The acceleration due to gravity is 9.8 m/s^2. If a rock is thrown downward with an initial velocity of
asked by cierra 
Physics
Period of moon=273 days Radius of moon =3,9x10^5 km Radius of satellite = 7200km Period of satellite=?
asked by Mk 
Physics HELP
How would I solve this problem? A plane travels 4300 m at an angle of 49 degrees to the ground, then changes direction and travels 6500 m at an angle of 21 degrees to the ground. What is the magnitude and direction of the planes tot displacement?
asked by Anonymous 
physics
A disk shaped yoyo (m=220 grams) has a 70 cm long string. The radius of the central winding peg is 2.5 mm, the outer radius of the yoyo is 5.6 cm. A) How much Torque is applied to this yoyo by the string? B) How long until the yoyo hits the bottom of the
asked by Anonymous 
English
1. People were deeply moved by his story. 2. His story deeply moved pople. 3. His story moved people deeply. ============== What is the active sentence of #1, #2 or #3?
asked by rfvv 
science
How much water must be added to 200 g of a 10% NaOH solution to obtain 8% solution
asked by mustafa 
College Algebra
Gary owns a car dealership that sells cars, SUVs and minivans. Gary has three times as many SUVs as Minivans. He has eight more cars than SUVs. If he has a total of 127 vehicles on his lot, how many of each type does he have?
asked by Need Help 
COMPUTER SCIENCE
how to develop a C program that will determine whether a departmentstore customer has exceeded the credit limit on a charge account.
asked by BILOLI 
math
A welder decides to make a pyramid shaped paperweight out of flat steel. the height of the pyamid is to be 3.5in and the square base has edges of 2.0in. how much sheet metal, in square inches, will he need to form the shell? to give weight, he is going to
asked by williams 
Chem
In the reaction that forms aluminum nitride from its elements, which element is being oxidized?
asked by Dan 
Math
What is the reciprocal of 3 3/7 Easy 7/e
asked by Layal 
Physics HELP
A bug on a picnic table travels 10 cm east, then 18 cm northward, and finally 20 cm westward. What is the bugs displacement relative to its original position?
asked by Anonymous 
chemistry
The average chemical bond energy in DNA molecules is about 300.00Kj per 6.02E23 bonds, estimate the number of chemical bonds that can be ruptured by a 1E9m xray photon.
asked by Brooke N 
precal : conics
Find the equation of the ellipse having the center at the origin and the major axes on OX. a) passing through (2 sq root of 2, 2), distance between foci is (4 sq root of 2) b)passing through ( 2,4), vertex at (4, 0)
asked by rhinechilde 
calc 2
Consider the 4 leaf rose and a circle having polar equations: r=10cos(2Θ) and r=5 with 0≤Θ≤2π, respectively. Find the area of the region that lies inside the rose and outside the circle. hint: find the smallest positive value of Θ for which the two
asked by josh 
Math
What is the standard deviation for the given data. Round your answer to one more decimal place 3,5,6,6,9,1
asked by Paul 
Calculus
Partial fractions of (2x^2 +8x+24)/(x+2)^2 (x^2 +4) I see a repeated quadratic and an irreducible quadratic..
asked by Rucha 
Math 6th grade
I do not understand verbal representation. Graphic re presentation? Numerical representation?
asked by Nicole 
Language
Try to sokve this compound puzze. A)(puzzle #1) Cook= book Volley= Express= Fore= Wrist= Loud= Key= B)(puzzle #2) Case= Park= Side= Stone= Tower= Phone= Walk=
asked by Sophie 
math
solve the system by substitution 4x5y=47 x=2y11
asked by Anonymous 
physics
Hello I'm having trouble with this physics question: You are examining the loss in intensity as light passes through a fibre optic cable. The input intensity is measured as 55.1 W/m2 and the output intensity as 28.7 W/m2. Calculate the attenuation of the
asked by diana 
English
Does this make sense? "Because bakers have the skills of a sculptor, it is for certain that wedding cakes are high art."
asked by Emma 
English
I have a homework, someone can help me pls.. Do u think being a teacher is a dream job?
asked by Favien 
math
x^2  4 What are the: Intervals on which the graph is above the x axis Intervals on which the graph is below the x axis Intervals on which the function is increasing Intervals on which the function is increasing Im not sure how to write these intervals..
asked by Rose 
Algebra
Think we have it but want to make sure Write the standard form of the equation of each line using integers. 1. Y=8/5x4 Answer 8x+5y=20 2. 4y=12+3x Answer 3x+4y=12 Thanks
asked by Mom 
Chem
How were each of the following cations utimately separated from the rest of the group and /or decorated? The use of equations may be helpful, where applicable. Ag+ K+ Nh4+ Al+
asked by Elena 
SOC 320
Which of the following is among the Courts’ means of influencing implementation? (Points : 1) Judicial review of administrative rules and rule making Direct oversight of executive branch agencies Routine judicial review of appropriations Intervening in
asked by Anonymous 
math
Express (a^2+abacbc)÷a^2c^2 over ab in single fraction. Answer is a^2b^2 over a+c How the steps?
asked by Agnes 
Engeline Christine academy
The cows are in the barn. Is barn a noun or adjective
asked by Haylee 
maths plz help
Painters A and B take 3 hours to paint a room Painters B and C take 5 hours to paint the same room Painters A and C take 7 hours to paint the same room How long would it take all three to paint the same room?
asked by Anonymous 
Math
What is the numerical expression for 8[(204)6]
asked by Anonymous 
English
Get a sneak peek of all the things to see and do in Yosemite and throughout the charming small towns outside Yosemite. ====================== There are two Yosemites in the sentence above? What does each Yosemite mean? Does Yosemite mean #1 or #2? 1.
asked by rfvv 
math
for each mathematical statement below determine if it's always, sometimes, or never true. a. mn = m  n b. b + (b) = 0
asked by teaopi 
Algebra
Divide and reduce to lowest terms wherever possible. 105/ 5+1/4
asked by John 
chemisty
how we prepare 0.5 mol of solution of hcl in 70ml in water
asked by asif 
College algebra
One pipe can fill the swimming pool in 6h and on other in 8h. If the first run for 2h and then the second is opened. How long before the pool is full?
asked by Britz 
maths
In hoe many years time will a some of money quintuple at a rate of 4% per annum compounded quarterly?
asked by farahan 
math
In how many years time will a sum of money quintuple at a rate of 4% per annum compounded quarterly?
asked by farahan 
physics help plz :)
A bicycle spins 10 revs in 5.7 sec. The radius of the wheel is 15 cm a drop of water is 0.3 grams. What height will the drop of water reach when it comes off the wheel? I know that I have to use the v=we equation and that grams need to be in kg. But I'm
asked by amelia 
math
when james planted a tree 5 m from a window the tree just blocked from view a building 50 m away if the building was 20 m tall how tall was the tree?
asked by lucy 
random question
Do bears eat wolfs? plz help I need it for presentation also im new to this website so ya answer the question plzzzzzzzzzzzzzz
asked by #AriannaGirl :) 
Trigonmetry
4 cos 2x + 3 sin 2x = 2
asked by Ali 
English
1. Mattie's first wish came true in 2001. 2. Mattie's first wish was realized in 2001. (Are both the same?) in 2001 3. in two thousand one 4. in twenty one. 5. in twenty o one. (Which reading is OK? Do you have other kinds of reading?)
asked by rfvv 
Quantitative Analysis
what percentage of women have shoe sizes greater than 11.33 if the mean is 8.27 and the deviation is 1.53? 11.338.27=3.06/1.53=2 95/2=47.5 5047.5=2.5
asked by Evelyn 
college algebra
john can usually wash a car in 45 mins. where as jim took 30 mins. for the job. one weekend they were in a hurry, so they worked together. How long did it take them?
asked by Britz 
Chemistry
What materials would be produced in the electrolysis of the following reagents? Please make sure that you correctly balance the equations! Also, please note the states of the reagents. NaCl (aq) > NaCl (l) > KBr (l) >
asked by Evan 
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 by Maddie 
math
Could someone please check my answer to this question: Evaluate the expression [(x^n)(y) + (y^n)] ^2n for x=2, y=3 and n=1 =[(x^1)(y)+(y^1)]^2(1) =[(x^1)(y)+(y^1)]^2 =[(x^2)(y^2)+(y^2) =y^2/x^2(y^2) =3^2/(2)^2(3^2) =9/4(9) =9/36 =1/4
asked by Anonymous 
math
if someone pays with a fifty dollar bill n the fare cost $28.10 how would i determine the change counting up ?
asked by theresa 
Math
Find the number that will make the following statement true 7x5=4x+4
asked by Cedrick 
st. marys orthodox school
how much dilute sulphuric acid add for making 18 g/l of Mohr salt solution
asked by reeti anand 
Language
Complite the sentences. A) We headed east on 89 until we crossed the _____ bridge. B) The_____ tournament was being held this year at Morgan secondary school. C) It looked like I would miss my _____ job since i wouldn't get home until after eight. D) Ehen
asked by Sophie 
Philoophy
Definition of Philosophy?? And Definition of logic ??
asked by Mark