Zayn
Most popular questions and responses by Zayn
Math
1. Which of the following numbers is a rational? A. 4/5 B. square root of 27 C. 4.02002000200002... **** D. Square root of 31 2. Which type of number is shown below? 0.313311333111... A. repeating decimal B. rational C. irrational **** D. terminating
asked on October 11, 2016 
Algebra
If a quadratic equation with real coefficients has a discriminant of 225, the what type of roots does it have?
asked on March 26, 2015 
Chemistry HELP
im confused please help thanks Gaseous nitrogen dioxide reacts with liquid water to yield aqueous hydrogen nitrate and nitrogen monoxide gas. Write the balanced equation including states
asked on March 3, 2019 
Trigonometry
A standard doorway measures 6 feet 8 inches by 3 feet. What is the largest dimension that will fit through the doorway without bending?
asked on April 16, 2012 
Maths
There were 3 glasses containing the same volume of liquid. Mr Lee poured 210 ml of the liquid from Glass A into Glass C, and 150 ml of the liquid from Glass B into Glass C. In the end, the ratio of the volume of liquid in Glass A to the volume of liquid in
asked on September 30, 2012 
Maths
The ratio of the amount of money Karen had to the amount of money Peter had was 2:5. Peter received $75 from his mother, the ratio became 4:15. How much money did each person have at first?
asked on September 30, 2012 
Maths
The ratio of the volume of water in Jug A to the volume of water in Jug B is 2:5. A.) If half of the water in Jug A is poured into Jug B, what is the new ratio of the volumes of water in Jug A to Jug B? B.) If half of the water in Jug B is poured into Jug
asked on September 30, 2012 
Maths
Tina and Gopal had some stickers in the ratio 2:3. Gopal gave half of his stickers away and the ratio became 4:3. If Gopal had given away 21 stickers, how many stickers did each person have at first?
asked on September 30, 2012 
Chemistry
If the empirical formula of a compound is CH2 and its molar mass is 70.0, then what is its molecular formula?
asked on December 4, 2018 
Chemistry
A galvanic cell is composed of these two halfcells, with the standard reduction potentials shown: Cu2+(aq) + 2 e >Cu(s) +0.34volt Cd2+(aq) + 2 e >Cd(s) 0.40volt What is the standard free energy change for the cell reaction of this galvanic
asked on April 16, 2015 
Maths
A car depreciates in value by 15% for the first year and for each year later by 12% of its value at the beginning of that year. Calculate the percentage decrease in the value of the car after 3 years. Could someone please confirm the answer to be 38.048
asked on February 15, 2017 
Maths
Evelyn has a ribbon 420 cm long. She uses 216 cm to decorate a present., What percentage of ribbon is left> Express your answer correct to 1 decimal place.
asked on October 4, 2012 
Maths
Mr Srinivasan invests $55 000 in a fixed deposit account. The interest rate is 3.3 % per year. How much money will he have in the account after 1 year?
asked on October 4, 2012 
Science
Describe how fans in a sporting stadium would need to move to create a transverse wave and a longitudinal wave
asked on February 8, 2017 
Maths
CORRECTION. The selling price of a pencil box was $4. Chee Keong bought the pencil box and paid $4.28 including GST. What percentage of the selling price was the GST?
asked on October 4, 2012 
Maths Percentage
After spending 30% of his money, John had $140 left. How much did he have at first. Siti and Ali saved $4500. Ali and Jim saved $2950. Siti saved thrice as much as Jim. How much did Ali save? At a concert, there were 15 more children than adults. Each
asked on February 11, 2013 
Maths
Rahyu spent 2h 25 min in a library. She spent 30 min of the time reading newspapers. What percentage of her time in the library was spent reading newspapers? Round off your answer to the nearest whole number.
asked on October 4, 2012 
Maths
The selling price of a pencil box was $4. Chee Keong bought the pencil box and paid $4.28 including GST. What percentage of milk was left?
asked on October 4, 2012 
Math interest
How long will it take for an investment of $5000 to double if it is invested at 5% p.a. simple interest? Been stuck on this and need help thanks
asked on February 8, 2017 
Maths
Su Mei bought 3 apples for $2n. How much did she have to pay for 18 apples?
asked on February 6, 2013 
Maths
Sam used cement and sand to prepare a mixture. The ratio of the number of pails of cement used to the number of pails of sand used was 1:2. Sam then added 8 more pails of cement and the ratio became 5:2. A.) How many pails of cement was used at first? B.)
asked on September 30, 2012 
Maths
Machine X can pack 3 crates of bottles and Machine Y can pack 4 crates of bottles within the same time. In half an hour, Machine X packs 24 crates. How many crates can 12 Machine Y s pack in 1 hour?
asked on February 6, 2013 
Maths
A jug contained 780 ml of mil. Mrs Li poured 221 ml of the milk into a glass and 130 ml into a cup. What percentage of milk was left in the jug?
asked on October 4, 2012 
Maths
The ratio of the number of coins Azam had to the number of coins Eddie had was 3:7. Eddie gave 42 coins to Azam and they ended up having the same number of coins. How many coins did each person have at first?
asked on September 30, 2012 
ALGEBRA
Write the equation of a line that passes through (4,2) and is perpendicular to 3x+6y=9
asked on November 27, 2017 
Maths
A sum of money is shared between Alice, Gayah and Sita in the ratio 3:2:4. If Gayah receives $4287.50, how much money do Alice and Sita receive altogether?
asked on October 1, 2012 
maths, economics, game theory
1. What is a degenerate game? 2. Is the following game degenerate or not, justify. 3. Find all nash equilibria in the game in pure or mixed strategies a b c d T 4,5 1,4 2,0 1,2 B 6,0 0,1 1,3 0,2
asked on February 23, 2011

American history
A. supporting the social and national wellbeing of Latin American nations.
posted on April 5, 2019 
Chemistry HELP
Thank you!
posted on March 3, 2019 
Maths
answer is £23360
posted on February 19, 2017 
Maths
Ohh I got it wrong but I'm sorry for not showing my working. I understand it now thanks for showing.
posted on February 16, 2017 
Maths
I want answer
posted on November 27, 2016 
3rd Grade Math
Just explain how to use X for him.
posted on April 16, 2016 
Economics
Limited resource is the basic assumption in Economy. Moreover, it's very true in daily life. For example, Peter want to join in several clubs and focus on his academic in the same time. However, here an opportunity cost for him to consider, because every
posted on April 16, 2016 
geography,tourism,economics and maths literacy
First get a high GPA and SAT scores. Every school has the fields you're interested in. An advice: The better the school you attend, the better education you'll receive.
posted on April 16, 2016 
economics
a. The apollo: It's government purchase. b. Subsidy to agriculture and industry: It's transfer payments because it didn't produce things. Literally, it's kind of wealth distribution. c. Social security: It's also transfer payments. The reason is the same
posted on April 16, 2016 
p
A) smell
posted on January 4, 2016 
physics
facts
posted on September 20, 2015 
math i don't get it
I don't get it
posted on January 25, 2014 
algebra with pizazz pg 40 riddle
8(4u1)12u=11(2u6)
posted on November 25, 2013 
Maths
Thanks
posted on October 4, 2012 
Maths
lol sorry :/
posted on October 4, 2012