Questions Asked on
February 19, 2017

Algebra2
suppose c and d vary inversely and d=2 when c=17 write an equation that models that variation find d when c=68
asked by Steve 
MATH
What is the percentage of sugar in the syrup made of 10 kg of water and 15 kg of sugar?
asked by Anonymous 
math
write a sequence of the transformation that maps quadrilateral ABCD onto quadrilateral A"B"C"D" in picture below.
asked by cmac 
Algebra2
write a recursive formula for the sequence 5,18,31,44,57 then find the next term. My answer is a1=5,an=an1+13 The next term would be 70.
asked by Steve 
Ordinary Differential Equation
Form the differential equation of the family of straight line with slope and y intercept equal
asked by Bilal 
Math
At the movie theatre, child admission is $5.50 and adult admission is $9.50. On Saturday, 148 tickets were sold for a total sales of $1170.00. How many adult tickets were sold that day?
asked by Chris Harris 
ChemistryUrgent
The partial pressure of CO2 inside a bottle of soft drink is 4.0 atm at 25°C. The solubility of CO2 is 0.12 mol/L. When the bottle is opened, the partial pressure drops to 3.0 ✕ 104 atm. What is the solubility of CO2 in the open drink? Express your
asked by Brianna 
math
Calculate the volume of a steel bar which is 8cm long and 3.5cm in diameter
asked by Margret 
chemistry
Hello, I was confused on this chemistry problem and I was wondering if someone could please help me. 1) Consider the following chemical reaction: 2CH3OH(I) + 3O2 (g) → 2CO2(g) + 4H2O(I) Calculate the number of moles of CO2 produced when 11.25 mL of
asked by molly 
chemistry
What volume of a 3.90 M KI stock solution would you use to make 0.430 L of a 1.25 M KI solution?
asked by john 
Algebra2
Does the relation in the table represent direct variation, inverse variation, or neither? if it is direct or inverse variation, write an equation to represent the situation. Explain your answer x 5, 10, 15, 20 Y 2, 1, 2/3, 1/2
asked by Steve 
Algebra
150g of sugar was used to make a bottle of 8% syrup. How much water was used to make this bottle of syrup? How much syrup is there in this bottle?
asked by Anonymous 
Math 104
There are 5 cyclists in a race. There will be a firstplace and a secondplace prize awarded. In how many different ways can the 2 prizes be awarded?
asked by Anonymous 
Chemistry
Recall the reactions for this lab: S2O82 + 2I → 2SO42 + I2 (slow) Reaction 1 The one that delays the solution turning blue: I2 + 2S2O32 → 2I + S4O62 (fast) Reaction 2 b. All the S2O32 is consumed when the color change occurs. Therefore, Δ[S2O32]
asked by Anonymous 
math
Justin is 3 years older then Sam, and Justin’s age in 2 years will be twice what Sam’s age was 3 years ago. Find their present ages. i got 14 and 17 but the answer is wrong
asked by allie 
Geo
(SAT Prep) The diagonals BF and CE divide the hexagon ABCDEF into two equilateral triangles and a square. Find the perimeter of the hexagon if BF = 3 cm.
asked by Anonymous 
physics
A 2000kg car is slowed down uniformly from 20m/s to 5 m/s in 4s. What is the average total force on the car during this time.
asked by Pau 
chemistry
How many grams of CaCl2 would be dissolved in 1.1 L of a 0.17 M solution of CaCl2?
asked by john 
Math
Neil has a total of twelve $5 and $10 bills in his wallet. He has 5 times as many $10 bills as $5 dollar bills. How many of each does he have?
asked by Juan Constantino 
Math
The figure at right shows a long rectangular strip of paper, one corner of which has been folded over to meet the opposite edge, thereby creating a 30degree angle. Given that the width of the strip is 12 inches, find the length of the crease.
asked by Jamie 
Chemistry
Write the formulas of the compounds formed by NH4+ with the following anions: CN−, HCO3−, SO42−, HPO42−
asked by Miranda 
math
Richard is 6 years older than Lisa, and in 5 years the sum of their ages will be twice as much as the sum of their ages 4 years ago. Find their present ages.
asked by allie 
Maths
Three circles of radius 1 unit fit inside a square such that the two outer circles touch the middle circle and the sides of the square. Given the centres of the circle lie on the diagonal of the square, find the exact area of the square. I got the answer
asked by Lilly 
Chemistry
Hello, I was hoping that I could get some help with calculating the mass needed to completely react with this question. In the following chemical reaction between H2 and N2 to produce NH3, what is the mass of N2 needed to completely react with 0.65 g H2 to
asked by anon 
General Chemistry
A student mixed the following reactants, using the general procedure for the experiment: 10.0 mL of 0.10 M KI, 10.0 mL of 0.0010 M Na2S2O3, 20.0 mL of 0.040 M K2S2O8, and 10.0 mL of 0.10M HCl. It took about 75 seconds for the mixture to turn blue. a. By
asked by Alexander 
CHEMISTRY
You carefully weigh out 20.00 g of CaCO3 powder and add it to 81.00 g of HCl solution. You notice bubbles as a reaction takes place. You then weigh the resulting solution and find that it has a mass of 92.80 g . The relevant equation is
asked by kaba 
Math
Mary is riding a merrygoround, whose radius is 25 feet and which is turning 36 degrees per second. Seeing a friend in the crowd, she steps off the the outer edge of the merrygoround and suddenly finds it necessary to run? At how many miles per hour
asked by Mike 
Maths
A farmer wishes to fence his field with 3 rows of wire.if the dimensions of the field are 120m by 68m,find the total length of wire required
asked by Anandh 
Chemistry
which salt solution would have the highest ph and why KI,KBr,KF,KCL or they all have the same ph. Im leaning towards KF since im pretty sure the other salts are neutral?
asked by Sean 
PreCalculus
How do I solve the equation: 3 = 2.1 sin[(pi/6)t  5pi/6] + 3.2
asked by Brian 
chemistry
calculate the number of molecules in 6.4g of so2. (b) 1.5 moles of hydrogen chloride
asked by obot 
Chemistry
Recall the reactions for this lab: S2O82 + 2I → 2SO42 + I2 (slow) Reaction 1 The one that delays the solution turning blue: I2 + 2S2O32 → 2I + S4O62 (fast) Reaction 2 b. All the S2O32 is consumed when the color change occurs. Therefore, Δ[S2O32]
asked by Alexander 
Geo
(SAT Prep) The perimeter of pentagon ABCDE is 30 in, AB = 7 in, BC = CD = 6 in, DE = 5 in. How many sides of the pentagon have equal length?
asked by Anonymous 
Chemistry
What are the molality and mole fraction of solute in a 30.1 percent by mass aqueous solution of formic acid (HCOOH)
asked by Daryll 
chemistry
With reference to collision theory account for the colour change that occurred when HCl was added to K2CrO4 (Cromate)
asked by kate 
Physics
The dipole moment of a water molecule is 6.37E30 Cm. What is the electric potential's magnitude 1.58 nm from a water molecule along the axis of the dipole?
asked by Sarah 
material science
What is the ratio of the maximum axial stress to the maximum bending stress in the inclined cell walls of hexagon honeycombs in terms of t,h ,l, and theta?
asked by lorenzo 
chemistry
What are the molality and mole fraction of solute in a 25.5 percent by mass aqueous solution of formic acid (HCOOH)?
asked by john 
Maths bearing
City A is 300km due east of city B ..city C is 200km on a bearing of 123* from city B how far is it from C to A
asked by Aisha 
Physics
When dots are placed on a page from a laser printer, they must be close enough so that you do not see the individual dots of ink. To do this, the separation of the dots must be less than Raleigh’s criterion. Take the pupil of the eye to be 2.9 mm and the
asked by Megan 
Chemistry
. A student mixed the following reactants, using the general procedure for the experiment: 10.0 mL of 0.10 M KI, 10.0 mL of 0.0010 M Na2S2O3, 20.0 mL of 0.040 M K2S2O8, and 10.0 mL of 0.10M HCl. It took about 75 seconds for the mixture to turn blue. a. By
asked by Anonymous 
Math
Using the Widmark equation, Write the equation you would solve to figure out how long it will take before his BAC is 0.08. Is it okay to round any constants to 3 decimal places.
asked by Vaughn 
chem
When 3.517 grams of a hydrocarbon, CxHy, were burned in a combustion analysis apparatus, 11.59 grams of CO2 and 3.164 grams of H2O were produced. In a separate experiment, the molar mass of the compound was found to be 40.06 g/mol. Determine the empirical
asked by jillian 
science
a body is released from the great height and falls freely towards the earth . another body is released from the same height , one second later . then the separation between the two bodies , two seconds after release of the second body is
asked by farha 
Chemistry
What are the molality and mole fraction of solute in a 30.1 percent by mass aqueous solution of formic acid (HCOOH)
asked by Daryll 
bio
a heterozygous tall pea plant is crossed with a short pea plant.what are the expected genotypic and phenotypic ratio for this cross
asked by yukino 
Differential equation
A spherical balloon remains spherical as it is slowly inflated. The radius of the balloon r (in cm) at time t (in seconds) satisfies the differential equation. Dr/dt = k/r^2 where k is a positive constant. When the radius is 3 cm, the radius is increasing
asked by Anon 
Maths,
A certain is to be shared among three brothers ,one of them gets 2/5 of it,another gets 1/4 of it and the third one gets #2.10k. How much is the sum of money?
asked by Pee 
Chemistry
What are the molality and mole fraction of solute in a 25.5 percent by mass aqueous solution of formic acid (HCOOH)? (Explain how you got the answer please)
asked by Brianna 
Physics
2300 Joules is used to lift a wheelbarrow through 4 meters up an inclined plane into a container. Why does the man use more joules (3500 J) to push the wheelbarrow?
asked by Tia 
Chemistry
Hello, I really don't understand how to find the grams of moles in some of these reactions. If someone could help I would appreciate it. 1) Balance the following chemical reaction and determine the number of moles of HI produced when 2.33 moles of H2(g)
asked by Anonymous 
probability
Tad draws three cards at random, without replacement, from a deck of ten cards numbered 1 through 10. What is the probability that no two of the cards drawn have numbers that differ by 1? Express your answer as a common fraction.
asked by nikhil 
chemistry
Balance the following chemical reaction and determine the number of moles of HI produced when 2.33 moles of H2(g) are consumed in the following chemical reaction: ___H2(g) + __I2(g) > ___HI (g)
asked by anon 
Math
In a book closet, mathematics books are kept in stacks of 4. If each student carries no more than one stack, what is the least number of students needed to carry books for a class of 23? Your multiple choices are a. 5 students b. 6 students c. 27 students
asked by Kelly 
Math
A segment that is a units long makes a Cdegree angle with a segment that is b units long. In terms of a, b, and C, find the third side of the triangle defined by this SAS description.
asked by Jane 
Calculus II
Find the centroid (x¯,y¯)(x¯,y¯) of the region bounded by: y=5x^2+6x y=0 x=0 x=6 I know the integral (think, at least) is from 0 to 6 and between the first and second equation given, but I missed this lecture and have no idea how to find the center of
asked by Ethan 
Math
A swimming pool is 25m long, 10m wide and 2m deep what is the volume
asked by Zak 
algebra
complete table for the following equation 2x+y=9 x y 3 1 4 5 1
asked by sofia 
chemistry
A 8.408 gram sample of an organic compound containing C, H and O is analyzed by combustion analysis and 12.53 grams of CO2 and 3.849 grams of H2O are produced. In a separate experiment, the molar mass is found to be 118.1 g/mol. Determine the empirical
asked by ALAN 
ChemistryUrgent
What is the percent by volume of ethanol in a solution that contains 26 mL of ethanol dissolved in 113 mL of water? explain please
asked by Brianna 
Algebra
Chloe wants to invest a total of $39000 into 2 savings account, one paying 6% per year in interest and the other paying 9% per year in interest (a more risky investment). If after 1 year she wants the total interest from both accounts to be $2730. How much
asked by Litzy 
Chemistry
What are the molality and mole fraction of solute in a 30.1 percent by mass aqueous solution of formic acid (HCOOH) can you please explain it better? I still don't quite understand
asked by Daryll 
chem
What are the molality and mole fraction of solute in a 25.5 percent by mass aqueous solution of formic acid (HCOOH)? work this one out please i didnt understand
asked by Brianna 
Physical Science
MH = 16.32 g/kg SH = 9.86 g/kg Air mass temperature = 15° C (59° F) What is the Relative humidity & the approximate Dewpoint temperature? How do i set this problem up? I do not understand. Thanks
asked by Jules 
Chemistry 121
. Using your calculated value for molar heat of reaction, how much heat would be given off in kilojoules if 3.0 grams of magnesium were to react with excess hydrochloric acid. Show work for your calculation. Value is 31.304 kJ/mol Mg
asked by Ty M. 
Math
Mr. shows bought movie tickets for the members of his family and spent $12.50 on popcorn. He spent a total of $46.25 for his family to go to the movies. How many tickets did he buy? (Write an equation containing a variable and solve)
asked by Jamye 
math
Problem 1:A semicircular garden has a radius of 10 meters. What is its area? ( Use pi =3.14) Answer:157m^2 Problem 2:The base of a cylindrical tank has a radius of 4.5 meters. What is its area? ( Use pi=3.14) Answer:65.585m^2 Problem 3:In the middle of a
asked by edd 
fractions
Sam saved 4/7 of his paycheck and spent 2/5 of the remaining money. He was then left with $9. What was the original value of Sam's paycheck?
asked by anagha 
Math
Peanuts, walnuts, and cashews are mixed by volume in the ratio 5:3:2, to make a party snack. The number of cups of walnuts needed to make 12 cups of party mix are between: a) 1 and 2 b) 2 and 3 c) 3 and 4 d) 4 and 5
asked by Terrence 
civic education
List six And explain internal limitation of human right And six external limitation of human right
asked by Hauwa 
Algebra
Find three consecutive integers whose sum is 138 by writing and solving an equation.
asked by Bonnie 
Math
Raoul got to spin this spinner ,to see what chorehe had to do Saturday morning. He could wash the dishes, wash the car,wash the dog,or change the paper in the rabbit cage.what is the chance he will have to wash something Saturday morning. As a fraction and
asked by T 
Chemistry
If you have 1911.9 g of a bleach solution. The percent by mass of the solute sodium hypochlorite NaOCl is 3.62. How many grams of NaOCl are in the solution
asked by Daryll 
Math
If the volume of a given cube is 512cm. What is the length
asked by Lisi 
math
A lawn50m.long and40m.broad has a path of uniform width 8m. outside it.Find the area of the path.
asked by Anshu 
Math
In a book closet, mathematics books are kept in stacks of 4. If each student carries no more than one stack, what is the least number of students needed to carry books for a class of 23?
asked by Kelly 
Math
Which is a reasonable estimate? 2/3 + 4/5 a.
asked by Kelly 
Math
Ryan needs 8 5/16 feet of molding to finish a closet. He has 6 feet of molding. How many more feet of molding does he need?
asked by Kelly 
Chemistry
You have 1683.8 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution? (show work Please)
asked by Brianna 
Astronomy
OK I have no clue how to do this . Can you believe that it is about 360¤F on Neptune,about 357¤F on Uranus? BRRRR ! That's cold! What is the temperature outside today in your town? How much warmer is it in your town than on Neptune? How much warmer is
asked by Unknown needs help 
Chemistry
What volume of a 4.50 M KI stock solution would you use to make 0.455 L of a 1.25 M KI solution?
asked by Daryll 
Math
Make c the subject c=ne/R±nr
asked by Exponent 
chemistry
What is the molality of a solution containing 11.1 g Na2SO4 dissolved in 2269.2 g of water? Just making sure would it be 11.1 divided by 2269.2 times 100?
asked by Brianna 
maths
Find the smallest positive 2 digit whole no which is divisible by 3 such that the sum of it digit is 9.
asked by akshay gupta 
physics
how is energy conserved ith a spring and box on a ramp. does 1/2kx^2 still equal gpe? what if the spring displacement is the same but the angle of the ramp changes, causing the gpe to change. how is energy conserved since the gpe is lower than before but
asked by Anonymous 
Math
Mr. shows bought movie tickets for the members of his family and spent $12.50 on popcorn. He spent a total of $46.25 for his family to go to the movies. How many tickets did he buy. (Write an equation containing a variable and solve) this is all the
asked by Jamye 
science
what are all the types of clouds
asked by donald trump 
algebra
Finde three consecutive integers such that the sum of the first and third is 16
asked by kath 
ChemistryUrgent
What is the molality of a solution containing 11.1 g Na2SO4 dissolved in 2269.2 g of water?
asked by Brianna 
maths
23m round off to the nearest 5m
asked by Gabriel 
chem
0.210 mole of Na2CO3 in 200.0 mL of solution
asked by Anonymous 
math
Give an example of an open interval, and an example of a set that is not an open interval. Use proper set notation and explain.
asked by maggie 
Physics
2300 Joules is used to lift a wheelbarrow through 4 meters up an inclined plane into a container. Why does the man use more joules (3500 J) to push the wheelbarrow?
asked by Kale 
english
a good debatable thesis for A good citizen A good citizen is honest and works hard so they could provide for the family
asked by Amber 
Math
While solar energy powered home systems are quite expensive to install, adding some passive energy features to conventional construction can make a substantial reduction in heating and cooling costs. Passive solar requires no machinery and uses the
asked by Karola 
Physics
A 50 ohm resistor consists of a copper portion joined to carbon portion, the resistance of the resistor being the sum of the resistance for 2 portions. Find the resistance of the copper portion of the resistor so that the combined resistance will be
asked by Mycah 
biology
a. what are the composition in nutrient broth? b. give 5 different types of media used for cultivation of microbes and define each?
asked by sophie 
chemistry
You have 1683.8 g of a bleach solution. The percent by mass of the solute sodium hypochlorite, NaOCl, is 3.62%. How many grams of NaOCl are in the solution?
asked by john 
Algebra I
3 bags of chips and 5 bottles of water cost $31. A chip costs one dollar less than 3 bottles of water. Find the cost of each.
asked by Elizabeth 
Organic Chemistry
Draw only the different stereoisomers for the following compounds: a) 2,4diiodohexane b) 1sbutyl3ethylcycloheptane
asked by Louis 
Organic Chemistry
Draw all the possible conformations for the following compounds and rank their stability (#1 least stable). a) 3chloro2methylpentane rotating between c3 and c4 b) 1cyclopropyl2flurocyclohexane
asked by Louis 
Physics
17 km due north, then at 7° south of east, and then 15 km at west of south
asked by Sotha 
addition vectors (physics)
75 km at 25° north of east, then 75 km at 65° south of west, and then 75 km due south
asked by Sotha 
physical science
How many minutes would be required for a 310.0 W immersion heater to heat 202.0 g of water from 22.0°C to 95.6°C?
asked by Keisha morris 
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 by Mat 
Physics
calculate K.E in Joules of a baseball w/ a mass of 237.2 cg moving at 85.00 mph
asked by Sarah 
fractionss
The Burger Barn served 24 customers yesterday. 1/2 of the customers ordered breakfast. 1/3 of the remaining customers ordered takeout. The rest of the customers ordered dessert. How many customers ordered desert
asked by anagha 
math
one half of jeans age two years from now plus one third of her age three years ago is twenty years. how old is she now?
asked by kath 
chemistry
how many moles of co2 produced when 3 moles of hcl react with caco3
asked by sandeep 
math
Write the inequality that represents the solution set for −15/9y < 11/13 . Please help thanks
asked by z 
Science
What is methanol?
asked by J 
maths
A boat covered the distance of 450km in 13/2 hrs. if the boat covers thefirst two third of the distance at the speed of 75km/hrs then at what speed would itcovers the remaining distance.
asked by akshay gupta 
physics
I'm not sure with this conversion... getting 9.843x10^4 ft/min to m/s ? How do I get to m/s using a specification conversion without using online conversions?
asked by Sarah 
physics
Last one! Thankyou for the help thus far... calculate the KE in kJ of 9.100 x 10^5 atoms of silver moving at 1800. km/hr. ... the atoms part is what I'm confused about.
asked by Sarah 
Calculus
Please help me solve these problems. 1.Find the inverse function (f^1) of √3x2 2. Integration ∫ the top is x while the bottom is 1. (sin(t))/t dt
asked by Jessica 
math
B owes $3000 due 2 years from today without interest and $2000 with interest at 4% compounded quarterly due in 6 years from today.if money worth is 5% compounded semiannually what single payment made 4 years from today will discharge his debts?
asked by AAA 
chemistry
What is the molality of a solution containing 11.1 g Na2SO4 dissolved in 2269.2 g of water?
asked by john 
Math
A circular sector has an 6.26inch radius and a 10.84inch arc length. There is another sector that has the same area and the same perimeter. What are its measurements?
asked by Jane