Questions Asked on
November 12, 2016

chemistry
If 200. mg of fluorine18 is shipped at 7:00 A.M., how many milligrams of the radioisotope are still active when the sample arrives at the radiology laboratory at 4:10 P.M.?
asked by Jae 
Physics
A car is traveling at 7.0 m/s when the driver applies the brakes. The car moves 1.5 m before it comes to a complete stop. If the car had been moving at 14 m/s, how far would it have continued to move after the brakes were applied? Assume the braking force
asked by Kayla 
Physical Science
A 68.4g sample of potassium chloride was added to 200.0 g of water at 20 C. Is the solution saturated, unsaturated, or supersaturated?
asked by Steve 
Maths
Given that 3^9 + 3^12 + 3^15 + 3^n is a perfect cube number. Calculate the value of n.
asked by Help 
Math
If the weight of a class 4 truck is increased by 2 tons will it still be classified as a class 4 truck
asked by Cristal 
Chemistry
Copper (I) chloride, CuCL, has Ksp = 1.9 x 10^ 7.calculate the molar solubility of CuCL in A)pure water, B)0.0200M HCl solution C) 0.200M HCl solution, and d) 0.150M CaCl2 solution. I used the ice table and for a) i got 0.000435 M sort of lost for the
asked by priya 
Goverment
list the advantages and disadvantages of confederal system of government
asked by Angelflora 
Math
A manchine prints 1500 newspaper in 45 minutes . How many will it print in 2 hours solution?
asked by Sandhya Pandey 
Math
Yuki has a ribbon that is 11 1/4 feet long. She divides it into pieces that are each 1 7/8 feet long. She uses three pieces to make a bow. How many bows can she make in all?
asked by Ashani 
Help SS!
In what ways were Federalists and Democratic Republicans similar? Both believed in promoting trade. Both had plans for a national bank. Both were strong supporters of the free market. Both were strong supporters of the Constitution. **??
asked by Stampy 
Calculus
A ladder a = 20 feet long is leaning against the wall of a house. The base of the ladder is pulled away from the wall at a rate of b = 4 feet/second. Consider the triangle formed by the side of the house, the ladder, and the ground. Find the rate at which
asked by Anonymous 
Math
select each situation in which one quantity at a constant rate in relation to another quantity. A. Brad drives 45 miles per hour. B. Frank earns 3% interest on his savings account C. Steve doubles the amount of water he drinks every week. D. Dan earns $12
asked by Blub 
Maths
Evaluate : 20142015×20152014 – 20142014 ×20152015
asked by Shal 
Math
an individual has purchased 275000 worth of savings certificates. Certificates expires in 25 years and a simple interest rate is computed quarterly at 3%per quarter. Interest checques are mailed to certificates holders ever 3 months. The interest the
asked by Shahzaib 
Physics
Imagine you are driving a car up Pike’s Peak in Colorado. To raise a car weighing 1000 kilograms a distance of 100 meters would require about a million joules. You could raise a car 12.5 kilometers with the energy in a gallon of gas (if all stored
asked by JAY 
Government
Which of the following statements about congress is not true? a.) in the senate, seniority still plays a role as to who is appointed committee chairpeople b.) in the house, rules on debate are more restrictive than in the senate c.) senators have more
asked by Raichel 
maths help plz&plz
The 79 members of a spot club play at least one of the following games Tennis, Football and Volleyball. 19 play Football & Volleyball and 29 play Tennis & Volleyball, n play all the three games. 2n people , each play only one game. How many play Volleyball
asked by Anonymous 
maths
a ships leaves port R, sails to S and then to port T. the bearing from R is 112, the bearing of T from S is 33 and the distance is 75km and the distance RS is 56. a) draw the diagram showing the journey of the ship from R to T. showing on your diagram i
asked by sheniel 
Math (Algebra)
A chemistry student needs to make 60 liters of a 30% alcohol solution. He has a 20% alcohol solution and a 40% alcohol solution in the lab. How many liters of each strength does he need to mix together *The system of equations I did was: a+b=60 &
asked by Amber 
physics
a uniform wooden beam 10 m long ang weighting 200 N is used to support a load of 300 N on the left end , and 500 N on the right end. Determine the center of the gravity if another load of 80 N is 2 m from the left end
asked by angelan 
Math
For every 5 highlighters that Agnes buys , she gets 1 free. If Agnes needs 80 highlighters, what is the least number of highlighters she has to buy?
asked by Karen 
Geometry
In Parallelogram PARK, angle P = (7x) degree angle A = (3x  20) degree angle K = (5y  10) degree. What is x + y?
asked by Angel 
Chemistry
Onethird cup of vanilla ice cream provides about 145 kcal of energy. A typical adult uses about 195 kcal/hr of energy while walking. If all of the energy in one third of a cup vanilla ice cream were to be burned off by walking, how many minutes would it
asked by Kay 
Math
Alvin has some marbles in a box. He keeps 1/3 of them and gives the remainder to Joyce and Sean. Joyce gets 5/8 of the remainder. What fraction of the marbles does Sean get?
asked by David 
Algebra
An object is dropped from a bridge. Find the distance the object has fallen when the speed reaches 60ft/s. Use the equation v=square root 64d, where v is the speed in feet per second and d is the distance in feet
asked by Anonymous 
College algebra
Sample of 500gms radioactive substance decays according to the function A(t)5000.044t where t is the time in years. How much of the substance will be left in the sample after 20 years?round to the nearest whole gram
asked by Deborah 
Chemistry
How many Cu+2 ions are in 5.33 mol of CuCl2? I did this so far: n> 5.33 mol Ncu> ? ions M= 134.45 g =5.33 mol x (602x10^23 ions/ 1 mol) =3.21x10^24 ions
asked by Sunny 
math
the square root of 5 less than 6 times a certain number is divided by the number and the quotient is 1.Find the number
asked by Sofia 
PHYSICS
To pull a car out of a ditch, one end of the rope POR is tied around a pillar at P and the other end is tied to the car at R. A force of 100N is applied to the Center O of the rope and perpendicular to PR. find the tensions in the rope if the angle POR =
asked by Anonymous 
Physics
A child pushes a wagon with a passenger of total mass 42 kg along a horizontal surface as fast as the child can run, and then releases the wagon, which continues for another 16 m before stopping. The coefficient of kinetic friction acting to slow the wagon
asked by Jatin 
Math
determine whether the graphs of the following equations are parallel or perpendicular y=2/3x + 3, y=3/2x, 2x3y=8
asked by JJ 
Science
Can resultant magnitude of two vectors be smaller than the magnitude of either vector?
asked by Aashna Chapagain 
PHYSICS
Heat transfer Q and work done W are always energy in transit, whereas internal energy E is energy stored in a system. Give an example of each type of energy, and state specifically how it is either in transit or resides in a system.
asked by JAY 
Maths
The angle of elevation of the top of a tower from a point 42m away from its base on level ground is 36°. Find the height of the tower
asked by Andrea 
math
Mom has 2 apples and 3 bananas. Every morning for 5 days she is going to give her son an apple or a banana. What is the probability that the boy will get a banana at least two days in a row during these five days?
asked by allie 
Math HELP!
If a population of fruit flies doubles every 3 days. What is k, the proportionality constant? How would I solve this problem? What would initial value be?? Thanks!
asked by Ellie 
Business Math
An investor has $ 500000 to spend. There investments are being considered, each having an expected annual interest rate. The interest rates are 15, 10 & 18 percent respectively. The investor`s goal is an average return of 15 percent in the three
asked by Abdul 
Maths
Evaluate: 5 + 8 + 11 + 14 + … … +395 + 398.
asked by Joker 
Math
A bus holds 32 passengers. 150 people want to go on a bus trip. How many buses are needed? And how many empty seats are there?
asked by Charlotte 
maths too hard help
At a conference of 100 people. There are 29 india women and 23 india men. Of these india people 4 are doctors and 24 are either men or doctors . There are no foreign doctors. How many women doctors are attending the conference step pl
asked by fui 
Chemistry
How many mL of acetone are required to make a 8.42 % v/v aqueous solution in a 300 mL volumetric flask?
asked by Hannah 
Math
The ratio of band students to choir students at Waldon is 75 to 30. What is the fraction of band students?
asked by Jo jo 
statistics
there are 7 blue socks,5 red socks,3 green socks and 4 yellow socks in a drawer. 1.find the sample space 2.how many socks should I take out without looking to get a pair of socks 3.what is the probability that the first socks that I draw is red 4.what is
asked by varghese 
chemistry
what volume of a 0.20M potassium sulfate solution contains 57g potassium sulfate?
asked by jen 
Physics  Energy
An airplane is flying with a speed of 250km/h at a height of 3610m above the ground. A parachutist whose mass is 75.2kg, jumps out of the airplane, opens the parachute and then lands on the ground with a speed of 3.75m/s . How much energy was dissipated on
asked by Kidd 
Biology
Which of the following best describes the genotypes of the offspring when Mendel crossed truebreeding (purebreeding) yellow seed plants with truebreeding green seed plants? A) The offspring had a combination of yellow and green seeds. B) The offspring
asked by HELP ME!!!!!! 
chemistry
calculate what volume of sulfuric acid solution(specific gravity=1.07;and containing 10%sulfuric acid by mass)contains 18.50g of pure sulfuric acid at a temperature of 25 Celsius.
asked by jen 
math
A basketball player had scored 865 points in 31 games. What was the rate in points per game?
asked by dion 
Maths
Asmo is putting some ping pong balls into 10 boxes. In each of the boxes, number of ping pong balls shall not be less than 11, not equal to 17 and is not the multiple of 6. If the number of ping pong balls are different in each box, at least how many ping
asked by Vault boy 
Algebra
A man drives from city to village a distance of 48 km ,in 45 minutes. Where the road surface is good , he drives at 72 km/hr and where it is bad , at 48 km/hr. Find the number of kilometres of good surface. (Form an algebraic equation and solve it).
asked by Zia 
Material mechanics
following data was obtained from a tensile test of steel. The test specimen was 15mm in diameter and 50 mm in length Load (kN) Elongation(mm) 5 0.005 10 0.015 30 o.048 50 0.084 60 0.102 64.5 0.109 67 0.119 68 0.137 69 0.160 70 0.229 72 0.300 76 0.424 84
asked by Ali 
Math
Kerri's father bill was a baker. Out of his usual morning batch of cookies bill burned the first 2 dozen cookies. He gave half of what was left to Keri to take to school. He wrapped up half of the remaining cookies and have them to a group of fireman. He
asked by Jessica 
Chemistry
What is the minimum volume of 2.00 M hydrochloric acid necessary to neutralize completely the hydroxide in 800.0 mL of 0.3 M calcium hydroxide?
asked by Kim 
Math
a rental car company charges a fee based of $44.82 plus $0.55 per mile driven. If x represents the miles driven, write an equation that could be used to find y, the total cost of the bill. My answer(s): 0.55 + x = y 0.55(x) = y X + 0.55 = y 44.82 + x = y
asked by Blub 
chem
At 25ºC and 1 atmosphere the following equilibrium is eatablished : 2NO (g) N2O4 (g) The partial equilibrium pressure of N2O4 is 0.7 atm. A) calculate Kp of the above system at 25ºC. B) calculate the partial pressure of the above two gases at equilibrium
asked by angy 
chemistry
the word "proof" on alcoholic beverages is defined as twice the percentage by volume. How many ml of alcohol are in a oneliter bottle of 80proof gin?
asked by jen 
English
1. I will guide you around today. 2. I will guide you round today. 3. I will guide you about today.  Are they all the same? ======================= Does #1 mean #4, 5, or 6? 4. I will guide you here and there today. 5. I will
asked by rfvv 
Physics
A 125g arrow is shot vertically upward with an initial speed of 28 m/s. Assuming 30% loss in total mechanical energy while ascending, what maximum height above the position from which it was shot does the arrow reach?
asked by Matt 
math
A soccer goalie has saved 7 goals out of 10 shots. How many goals will she likely let in on 100 shots?
asked by srikar 
English
1. That's fine with me. (Does 'with' mean 'being related to'?) 2. It's raining much. 3. It's raining a lot. 4. It's raining hard. 5. It's raining heavily. 6. It's raining cats and dogs. (Are they all the same in meaning? Can we use 'much' instead of 'a
asked by rfvv 
Math
A machine prints 1500 newspaper in45 min . How many will print in 2 hours ?
asked by Anonymous 
Math
At the market, 0.2 of the pieces of fruit are peaches, 0.25 is apples, 0.05 is lemons, 0.1 is cherries, 0.2 is grapes, and 0.15 is plums. There are also 8 pineapples and 4 mangos. How many peaches are for sale at the market? How many apples? How many
asked by David 
urgent math
Paul is standing on a 39 m high building. The angle of elevation to the top of a taller building is 47 degrees and the angle of depression to the bottom of the same building is 36 degrees. What is the height of the taller building to the nearest tenth.
asked by Sarah 
Math
In a standard set of dominoes, a face of each domino has a line through the center, with 0 to 6 dots on each side of the line. Each possible combination of dots is used exactly once, one combination per domino. What is the probability that a randomly
asked by Alyssa 
English
1. I will be a musician one day. 2. I will be a musician some day. (Which one is correct? Are both OK? Then which one is commonly used?) 3. She is putting on cosmetics on her face. 4. She is wearing cosmetics on her face. 5. She is puting on makeup on her
asked by rfvv 
math
if jake can ride his bike to the store that is 20 miles away in 45 minutes how far can he bike i i hr
asked by hgfhgfh 
Math
The sum of real values of k for which the cubic x^3kx+k1=0 has exactly tho distinct real solution.
asked by Nikhil 
Trigonometry
If Sin Teta =3/5.Find Tan Teta For Teta Degree
asked by Ikechukwu 
maths help sir steve
sir steve what about these i just solved it now i didnt get it if x^2+2xy+3y^2=1 prove that (x+3y)^3d^2y/dx^2+2(x^2+2xy+3y^2)=0 i solve with implicit derivative like these 2x+2(xdy/dx+y)+6ydy/dx=0 2x+2xdy/dx+2y+6ydy/dx=0 2xdy/dx+6ydy/dx=2y2x
asked by practising and need help 
chemistry
how many grams of potassium nitrate are needed to prepare 250.0ml of a 0.03M potassium nitrate solution?
asked by jen 
science
what is the animal that can sleep by his backbone in the world?
asked by teferi olana 
Math
Directions are "Order these integer decimals from least to greatest: +.125, .1428, 0.025 (with a repeating 5), 0.2. I'm thinking that ordering from least to greatest would be: .1428, 0.025, .125, 0.20
asked by paula 
Accounting
Rented an office and paid three months rent in advance to property Management check #001 $4,500. How would this journal entry be posted to the general journal.
asked by Maria 
Math
Jack and John have heights in the ratio 5:6. If John's height is 186cm, what is Jack's height?
asked by Oli 
Maths
Ten students sit a test consisting of 20 questions. Two students get 8 questions correct and one student gets 9 questions correct. The remaining seven students all get at least 10 questions correct and the average number of questions answered correctly by
asked by AMT help 
mathematics
a fraction is such that the denominator exceeds the numerator by 3.if both the numerator and numerator are reduced by 2,the fraction is decreased by 1/8.find the fraction
asked by Isaiah 
math Trigonometry
A wire is attached to a cell phone tower at Sunshine Village. The wire is 15.6m in length, and the angle of elevation is 54°. What is the distance between the wire and the base of the cell phone tower, along the ground, correct to the nearest tenth of a
asked by Emily 
maths
sir steve plz am a little confuse (xy)³=A(x+y) prove that (2x+y)dy/dx=x+2y if y is a function of x and x=e^t/(e^t+1) show that dy/dt=x(1x)dy/dx plz explain to me very well sir damon answered that but i still dont get it If u want me to show my work i
asked by practising and need help 
L'Hospital's Rule and Indeterminate Forms
I understand LHR can be applied to limits of the indeterminate form 0/0 and inf/inf. However, can it be applied to the other indeterminate forms of 1^inf, infinf, inf^0, 0^inf, and inf*inf?
asked by Tim 
math
From the whole numbers 1 to 100, how many cannot be divided by 6 or 9?
asked by Dran 
physics
Rain drops do not accelerate for long terminal speed due to the vicious drag of the air.if this did not happen rain drop would hit us with a dangerous high speed.discuss
asked by ameen 
math
(2)^3+0.2/211/4=5 How to show work for the answer 5
asked by Tricia 
math
there are 63 animals. 2 are horses .there 5 more chickens than 3 times the pigs. there are 2 less chickens than half pigs times 7
asked by firn 
math
By how much does 17 exceed the difference of 5 and 5?
asked by Alex 
Math Word Problems
Bart, Lisa and Maggie went to the "Integers Only Really Expensive Fruit Stand" to buy some fruit. Bart bought 2 pomegranates and 1 kiwi for exactly $16. Lisa bought one pomegranate and 2 kiwis for exactly $11. Maggie bought 1 pomegranate and 1 kiwi. How
asked by Anonymous 
Math
Aaron and Ben have a total of 976 trading cards. Ben has 7 times as many cards as Aaron. How many cards should Ben give Aaron so that Aaron will have 3 times as many cards as Ben?
asked by Karen 
chemistry
how much solute are present in a solution that contains 100.0g of water, and is 9.0% by weight sodium bicarbonate?
asked by jen 
math
x + 2y= 2 y= 2x13
asked by dashawn 
math
(x1)+(x2)+ ...+(x10)=0 Find the answer?
asked by ela 
math
which of the following is a Pythagorean triple and why A:8,3,6 B:13,12,5
asked by dude 
Geometry
In Parallelogram PARK, angle P = (7x) degree angle A = (3x  20) degree angle K = (5y  10) degree. What is x + y?
asked by Anonymous 
Math
Order the numbers GREATEST to LEAST. 6.5, 31/5, √40, 6.6 My answer: 6.6, 6.5, √40, 31/5 (6.5 is a repeating decimal btw)
asked by Blub 
Math
How could Jason solve for T in this equation? T  8 = 40 A) add 8 to the left side B) add 8 to the left side and subtract 8 from the right side C) add 8 to each side D) divide each side by 8
asked by David 
Math
Onequarter of Steve's baseball cards are from his dad's collection. Another 0.2 are from his uncle, and 0.5 are from his brother. The rest are from Steve's cousin. Thirty of the cards from his cousin are National League players; the other half are
asked by David 
math
My average in AP world history is a 90, The weight on the class is 1.10% with the weight, whats my average?
asked by Tom 
Math
What is the solution to (4 x 10^3) x (6 x 10^6) written in scientific notation? 24 x 10^9 2.4 x 10^9 24 x 10^18 2.4 x 10^10
asked by Cody 
Linear Algebra
Let v1 = (1, 0, −1) v2 = (0, 2, 2) v3 = (−3, 4, 7) and let W = Span{v1, v2, v3}. Show that W = Span{v1, v2}? How would I go by doing this? Thanks in advance.
asked by Zabe 
physics
What is the kinetic energy gained by a 500kg car accelerating from rest to 27m/s? 1/2=mv^2 > 1/2(500)(27m/s)^2= 182,250J a. What is the power output in watts of the engine that causes this acceleration in 4.00s? 27m/s*4s= 108m/s^2 1/2(500)(108)= 27,000
asked by JAY 
Calculus
Suppose that f(x+h)f(x) =4 h x^2  1 h x + 4 h^2 x + 3 h^2 3 h^3. Find: f^1(x)
asked by Amy 
math
Twothird of a number is 72 less than its 120%.What is the product of the digits of the number?
asked by Divya Mallick 
Math
In a class where there are as many girls as boys, 2/5 of the boys and 1/2 of the girls went to a local fair. What fraction of the students in the class did not go to the local fair?
asked by David 
computer
A square with each side 70 long.
asked by yashdeep 
maths
mary is now three times as old as susan. Three years ago,the sum of their ages was 22. how old is susan now
asked by Anonymous 
Math
What should Edna do to solve for m in the equation? 65 = m + 29 A) add 29 to each side B) add 29 to the left side C) subtract 29 from the right side D) subtract 29 from each side
asked by David 
maths sir steve plz reiny plz sir damon plz help
express 1.1 in surd form pllllllz
asked by Anonymous 
Linear Algebra
Let B be the set of vectors in R^3 given by B = (1, 1, 0) , (1, 1, 1) , (0, 1, −1). 1. For x = (x1, x2, x3)^T a vector in R^3, find the scalars c1, c2, c3 (that will depend on x1, x2, x3) such that x = c1(1, 1, 1) + c2(1, 1, 1) + c3(0, 1, −1) Can
asked by CSCE 
Math
What is the first common number among: palindromic numbers, Triangular numbers and Fibonacci numbers?
asked by Adam 
Math
simplify ratio 1/5:1=
asked by Dorce 
science
Who is the father of computer?
asked by Anonymous 
maths sir steve plz reiny plz sir damon plz help
express 1.1 in surd form pllllllz step
asked by Anonymous 
Material mechanics
A flat plate specimen of a soft metal alloy is to be tested by pulling on round pins inserted through the ends of the plate, as illustrated below (a) Calculate the required diameter of the pins, given that the plate is 8.0 mm thick, the maximum tensile
asked by Ali 
math
find the 8th term in the expension of [(x)^1/2 +2/(x)^1/2]^12
asked by shahzeb 
math
(x1)+(x+2)+(x3)+(x+4)...+(x+100)=0
asked by dona 
Biochemistry
How does acetyl coA get out of the mitomatrix and into the cytoplasm? If you could explain this process, or reference me to a good picture or graphic of this process I would greatly appreciate it! Thank you so much for your help!
asked by Student 
Science
In many country celcius scales are used give reasons
asked by Anonymous 
Maths
If Sin X=4/5.Find Cos X Where X
asked by Ikechukwu 
Linear Algebra
Let v1 = (1, 0, −1) v2 = (0, 2, 2) v3 = (−3, 4, 7) and let W = Span{v1, v2, v3}. What is the dimension of W? Is it 2? Any explanation would be great too. Thanks.
asked by Zabe 
English
1. On the way to Dokdo(small island), it was so windy that I got sick.  Does 'got sick' mean 'became ill' or 'became seasick'?
asked by rfvv 
satistics
What is t? What is r2? n = 25 MD 4.7 s2 = 64
asked by Tracy