Questions Asked on
August 3, 2015

Algebra ASAP
The halflife of krypton91 ^(91Kr) is 10 seconds. At time t = 0 a heavy canister contains 6 g of this radioactive gas. (a) Find a function m(t) = m02^−t/h that models the amount of ^(91)Kr remaining in the canister after t seconds. m(t) = (b) Find a
asked by Fay 
Urgent math
The initial size of a culture of bacteria is 1000. After one hour the bacteria count is 4000. (a) Find a function n(t) = n0ert that models the population after t hours. n(t) = b)Find the population after 1.5 hours. (Round your answer to the nearest whole
asked by Emma 
math
A grocer wishes to blend two different coffee brands because he wants to make a blend of 480 pounds to sell at $2.68 a pound. If he uses a brand of coffee worth $2.50 a pound with another brand worth $2.80 a pound, how many pounds of each does he use?
asked by Anonymous 
Urgent math
population growth model. Can anybody please help me out in trying to solve this problem? It's my homework and I don't seem to understand what I am getting. The count in a culture of bacteria was 400 after 2 hours and 25,600 after 6 hours. (a) What is the
asked by Lydia 
Chemistry
Water is sprayed on oranges during a frosty night. If an average of 11.8 g of water freezes on each orange how much heat is released. Can you please help me set this problem up. I don know what formula to use? thank you
asked by SS 
Equilibrium
An equilibrium mixture at 852 K is found to contain 3.61*10^3 mol/L of SO2, 6.11*10^4 mol/L of O2, and 1.01*10^2 mol/L of SO3. Calculate the equilibrium constant Keq, for the reaction where SO2 and O2 are reactants and SO3 is the product. Equation would
asked by Tyler 
physics
A projectile is fired from a cliff 300 m high with an initial velocity of 400 m/s. If the firing angle is 30 degrees from the horizontal, compute the horizontal range of the projectile.
asked by Gela 
calc
Use the graph of f(t) = 2t + 4 on the interval [−4, 6] to write the function F(x), where f of x equals the integral from 2 to x of f of t dt.
asked by Anonymous 
calc
Use the graph of f(t) = 2t + 4 on the interval [−4, 6] to write the function F(x), where f of x equals the integral from 2 to x of f of t dt.
asked by Anonymous 
Chemistry
1.00g of oxygen combine with 0.126 g of hydrogen to form H2O. 1.00 g of nitrogen combie with 0.216 g of hydrogen to form ammonia. Predict the weight of oxygen required to combine with 1.00 g nitrogen to form an oxide.i m a student
asked by Rao 
Chemistry
The percent is confusing me, can you please help me set this equation up. How much heat is liberated when 5.00 kg of coal is burned if the coal is 96.2% carbon by mass and the other materials in the coal do not react? (delta)H comb of carbon is 394kJ/mol
asked by Syd 
Physics
A lighted candle is placed 38 cm in front of a diverging lens. The light passes through the diverging lens and on to a converging lens of focal length 10 cm that is 5 cm from the diverging lens. The final image is real, inverted, and 19 cm beyond the
asked by Ali 
Algebra ASAP
Suppose that $17,000 is invested in a savings account paying 5.1% interest per year. (a) Write the formula for the amount A in the account after t years if interest is compounded monthly. A(t) = (b) Find the amount in the account after 3 years if interest
asked by Fay 
College Algebra
This exercise uses the radioactive decay model. A wooden artifact from an ancient tomb contains 80% of the carbon14 that is present in living trees. How long ago was the artifact made? (The halflife of carbon14 is 5730 years. Round your answer to the
asked by Melany 
Urgent math
please help The fox population in a certain region has a relative growth rate of 7% per year. It is estimated that the population in 2005 was 19,000. (a) Find a function n(t) = n0ert that models the population t years after 2005. n(t) = (b) Use the
asked by Lydia 
College Algebra
This exercise deals with logarithmic scales. Earthquake A had a magnitude of 8.2 on the Richter scale. At the same time an earthquake B with magnitude 4.8 caused only minor damage. How many times more intense was earthquake A than earthquake B? (Round your
asked by Melany 
Physics
Force of 2.25N is acting on charge 15x10^4C at any point. Find the Electric Field Intensity at that point.
asked by Clifford 
Physics
A convex mirror (f1 = −6.30 cm) and a concave mirror (f2 = 9.50 cm) are facing each other and are separated by a distance of 24.0 cm. An object is placed between the mirrors and is 12 cm from each mirror. Consider the light from the object that reflects
asked by Ali 
life science
Investigation to determine whether expired air contains carbon dioxide how should state the method,step by step for the experiment
asked by john 
Math
jack and jerry can complete a job together in 4 hours. if jack require 6 hours to do the job alone, how many hours will it take jerry to do the job alone. A.12 B.10 C.8 D.6 E.4
asked by Michelle 
Trigonometry
A segment of height 3 inches (distance from center ofchord to center of arc) has an arc of .4 radian.find the area of a segment.
asked by Kenneth 
Math
Julia spent 1/3 of her birthday money. Then she lost 1/2 of the rest. She now has $10.00 dollars left.how much did she get for her birthday.
asked by Jeremiah 
Math
Sara is making cookies and the recipe calls for 2 1/2 (2.5) cups of sugar to make two dozen cookies. How many cups of sugar will she need to make five dozen cookies? Express the answer as a mixed fraction and as a decimal
asked by Cheyenne 
Chemistry
1.00g of oxygen combine with 0.126 g of hydrogen to form H2O. 1.00 g of nitrogen combie with 0.216 g of hydrogen to form ammonia. Predict the weight of oxygen required to combine with 1.00 g nitrogen to form an oxide.
asked by Rao 
HISTORY,GEOGRAPHY,MATHS LIT,LIFE ORIENTATION,...
OK HEY,,,IM LOST I DON'T KNOW WHAT TO DO NEXT YEAR BECAUSE IM CURRENTLY DOING MY LAST YEAR AT HIGH SCHOOL SO HELP ME,,WHAT MUST I DO?
asked by UZUAKHANYE 
physics
a stone projected horizontally from the top of a tower with a speed of 4m/s lands on the level ground at a horizontal distance 25m from the foot of the tower. calculate the height[g=10m/s2]. is it u squared divided by 2g
asked by Emmanuel 
Urgent math
g(x) = log3(x + 3) state its domain, range, and asymptote. i am having trouble with this can somebody help me?
asked by Emma 
Chemistry
Can you please help me with this problem, I am so confused, and I do not know how to set it up, what equation to use, and what do i need to convert. 1 Transportation Ethanol is being used as an additive to gasoline. The combustion of 1 mol of ethanol
asked by Syd 
Physics
charges of 6nC and 4nC are 3m apart.(a)Determine the force they exert on each other.(b) the net electric field intensity at a point midway between them.
asked by TechyBoy 
English
Archetypes frequently appear in literature with  a contradictory themes b general themes c universal themes d specific themes my answer is D
asked by Steve 
Urgent math
i need help with these two homework problems Use the Laws of Logarithms to combine the expression into a single logarithm log2 5 − 5 log2 x + 1/2 log2(x + 1) Solve the logarithmic equation for x log2(x + 2) + log2(x − 1) = 2
asked by Emma 
chemistry
Could you please tell me the objective, theory and mechanism,result, precautions and applications of following experiment : reaction of 4aminotoluene and ovanillin(preparation of azomethine)
asked by Edward 
life orientation
List and discuss any four factors that could threaten or limit the core functions of the media
asked by nokwazi 
Precaculculus
Suppose you are told that log(2)=0.3562 and log(3)=0.5646. All of them with the base of 'a'. Find: i) log(6) ii) log(9) Solutions i) log(6)= log (3)(2) = log 3 + log 2 = 0.5646 + 0.3562 = 0.9208 ii)log(9)= log 3^2 = 2 log 3 = 2 (0.5646) = 1.1292
asked by Aron 
Geometry
What is the Midpoint of CD given the coordinates C(4,8) and D(8,4)?
asked by Connor 
Life science
Why are thesa fossils important discoveries?
asked by Eunice 
Leshikishiki
Research on processes of campaigns and protests
asked by Dipolelo 
Equilibrium
The following reaction has an equilibrium constant (Keq) of 160. 2 NO2(g) 2 NO(g) + O2(g) What will be the reaction quotient (Q) and in which direction will the reaction proceed if the partial pressure of NO2 is 5.0*10^4 atm, NO is 0.080 atm, and O2 is
asked by Tyler 
Equilibrium
An aqueous solution of carbonic acid reacts to reach equilibrium as described below. H2CO3(aq) + H2O(l) HCO3^(aq) + H3O^+(aq) The solution contains the following solute concentrations: Carbonic Acid: 3.3*10^2 mol/L HCO3^: 1.19*10^4 mol/L H3O^+:
asked by Tyler 
JNV
An isotope has a 12.4 hrs halflife. If it has an activity of 30mCi at noon today, what was its activity at 3 pm yesterday?
asked by VSG 
life science
At high altitude the atmospheric pressure is lower and the air is less dense than at low altitude.this means that at high altitude there is less oxygen available for gaseous exchange thus gas exchange becomes less efficient. what conclusion can be
asked by merissa 
Chemistry
Given the following reaction: 3 H2(g) + N2(g) 2NH3(g) + heat If the following changes were to occur what direction shift will it have (left or right) And what will be the reason of the shift Changes/Stress on system: Adding NH3 Decreasing the pressure
asked by Sarah foster 
Chemistry
Given the following reaction: 3 H2(g) + N2(g) 2NH3(g) + heat If the following changes were to occur what direction shift will it have (left or right) And what will be the reason of the shift Changes/Stress on system: Adding NH3 Decreasing the pressure
asked by Sarah foster 
Chemistry
Any student is welcome to use this for extra practice and anyone is welcomed to amswed the question. Here is a couple of practice problems a) 2 N2O(g) + O2(g) 4 NO(g) B) H2(g) + CO2(g) H2O(g) + CO(g) C) 4 HCl(g) + O2(g) 2 Cl2(g) + 2
asked by Cole williams 
math
I watched 1000 ants build an anthill in 5 hours. Working at the same rate, 2500 ants could have built the anthill in ? hours? A. 1 B. 2 C. 3 D. 4 I made a proportion of 1000/5=2500/x, and got 12.5, but that's not a choice. HELPS!
asked by Ryan 
physics
In Example 5.8 in the text book, we investigated the apparent weight of a fish in an elevator. Now consider a 72.0 kg man standing on a spring scale in an elevator. Starting from rest, the elevator ascends, attaining its maximum speed of 1.20 m/s in 0.80
asked by sacrevman 
Administrative Office Procedures
If you have several calls coming in at one time, you should: A. ask someone else to help you. B. answer each call as soon as possible, saying, "Good Morning, Mr. Smith's office, will you hold, please?" C. handle one call at a time. D. answer each call by
asked by Anonymous 
College Algebra
4 + 5^6x = 8 (a) Find the exact solution of the exponential equation in terms of logarithms. x = (b) Use a calculator to find an approximation to the solution rounded to six decimal places. x = can any body help me out here please?
asked by Melany 
precal
Change of Base Formula logb x = loga x/loga b to evaluate log14 41. (Round your answer to three decimal places.) i need a step by step preview please
asked by Emma 
math
Solve using suitable property [name the property] 1]428 x[23]+[428]x(223) 2] 105 x(37)
asked by Raina 
english
. A sinking fund is the accumulated amount to be realized at some future date (the end of the term) when a fixed number of periodic payments are paid into an account earning interest at the rate of i per period
asked by lashay 
maths
decimals, exponent
asked by rajshree singh 
Algebra
Solve the exponential by expressing each side as a power of the same base and then equating exponents. 5^x2/4=squaroots 5 please help. Thanks!
asked by Valentina 
Filidi senior secondary school
Please analyse the following statement "The media do not tell us what to think but they tell us what to think about ".
asked by siduduzo 
history
the war powers resolution is possibly unconstituional because of what
asked by stacy 
NURSING ASAP
Is nursing considered a a science major because I'm taking this course called "CHEM 1001 Chemistry and the World Around Us?" and I studying nursing in college. Please be honest. Thank you! :)
asked by Sam 
math
A received 44 more votes than B there were a total of 550 votes / 2 candidates how many votes did each receive write an equation where b received how many votes
asked by jerry piester 
Math
The supplement of an angle measures 11 times its complement. Then the measure of the angle is... A. 9 degrees B. 81 degrees C. 90 degrees D. 99 degrees E. 100 degrees
asked by Michelle 
Urgent chemistry
Given the following reaction: 3 H2(g) + N2(g) 2NH3(g) + heat If the following changes were to occur what direction shift will it have (left or right) And what will be the reason of the shift Changes/Stress on system: Decreasing the pressure Adding heat
asked by Nathaly hernandez 
Life orientation
What is the following statement mean? In terms of media. "media do not tell us what to think but they tell us what to think about"
asked by Anonymous 
math
3^200/3^50 a. 4 b. 150 c. 3^4 d. 3^150
asked by Anonymous 
Algebra
5(a  7) + 7= 2(a  5) 5a 2a= 3a 14  5 = 9 Am I doing it right? a = 27
asked by Dee365 
accounting
A doctor's office paid $18,000 on insurance for a full year. What will be the balance of the prepaid expense after 8 months?
asked by delmara 
english
How can animated jungle animals, sea creatures, fairies, cars and other nonhuman characters can be used to represent race?
asked by eric 
math
WHAT ARE THE QUESTION IN BUSMATH?
asked by tan 
Differential Equations
Solve x(dy/dx)=(y^2)/(1y log x).
asked by Ranajoy 
Math
Suppose that a certain material has a half life of 25 years, and there are A(t)=10(1/2)^t/25 grams remaining after t years. find: i) initial amount i) Amount after 80 years Solutions i) A(0)=10(1/2)^(0/25) =10(1/2)^0 =10(1) =10 ii)A(80)=10(1/2)^(80/25)
asked by Aron 
ENN103F
How can animated jungle animals, sea creatures, fairies, cars and other nonhuman characters can be used to represent race
asked by Mandisa 
physics
In a gas two waves of length 1m and 1.10m have a frequency difference of 10/3 Hz, the velocity of sound is ? a) 166m/s b) 332m/s c) 83m/s d) 336.7m/s
asked by Muqadas 
English
Is a clause a part of speech? My answer is no.
asked by Steve 
kgothala s school life orintation
meaning of campain with responsibility
asked by nomthandazo mgaga 
probability
the set s={xx2+4x5=0}
asked by saman 
math
If a line whose x and y intercepts are equal does not pass through the origin, then its slope must be A. 0 B. 1 C. 1 D. undefined I'm thinking it's 0, I don't know though.
asked by Ryan 
math
The result of adding a number to itself is usually unequal to the result of multiplying the number by itself. For how many different numbers are these results equal? A none B. one C. two D. four
asked by Ryan 
Chemistry
1)During an endothermic reaction, total energy A. decreases. B. increases. C. stays the same. D. cannot be determined. 2)The enthalpy of formation of an element is A. negative. B. positive. C. zero. D. negative or positive, depending on which element. i
asked by Anonymous 
math
If a line whose x and y intercepts are equal does not pass through the origin, then its slope must be A. 0 B. 1 C. 1 D. undefined I'm thinking it's 0, I don't know though.
asked by Ryan 
ENN 103F
HOW CAN ANIMATED JUNGLE ANIMALS, SEA CREATURES, FAIRIES, CARS AND OTHER NONHUMAN CHARACTERS BE USED TO REPRESENT RACE?
asked by tshepo rakereng 
ENN 103F
explain dr charles da costa's theory on racial stereotyping
asked by tshepo rakereng 
chemistry
Please tell me any website....where I can find details of the experiment Reaction of 4aminotoluene and ovanillin(for preparation of azomethine)
asked by Edward 
math algebra
At your local bar, chicken wings cost $0.30 a piece on Thursday night. Sriacha Ranch dressing (enough for 10 wings), cost $0.10 per serving. A pitcher of of ice tea cost $7.50 and a serving of celery cost $2.50 . Tax in your part of LA County is 8.5% and
asked by Justin