Saturday
December 3, 2016

# Posts by Kristen

Total # Posts: 482

chemistry
how many moles of NH3 does it take to make 8.0 mol of H20 according to the reaction shown below? 4NH3 + 5O2 --> 4NO + 6H2O I REALLY NEED HELP WITH THIS AS I AM LOST. PLEASE PROVIDE NOTES.
September 13, 2016

I dont know.
September 1, 2016

math
Find the constant as such that the function: f(x)= {x^2-a^2 x does not equal a {8, x equals a
June 8, 2016

Math
A box can hold 175 cubic inches of cereal. Of the box is 7 inches long and 2.5 inches wide, how talk is it ?
April 26, 2016

math
If there are 150 students in the club and a recent survey shows that 3 out of 5 prefer Tues. meetings, how many do not want to meet on Tues. ?
April 20, 2016

English
Do you agree or disagree with the following statement children should begin stadying a foreign languages as soon as they start school.Why? Why not?
November 25, 2015

Physics
"Rocket Man" has a propulsion unit strapped to his back. He starts from rest on the ground, fires the unit, and accelerates straight upward. At a height of 16 m, his speed is 5.0 m/s. His mass, including the propulsion unit, has the approximately constant value of ...
October 21, 2015

life skills
ok if you have a 04 oldsmobile alero gll that gets 29 miles to the gallon and you are traveling 2232 miles how many times would you have to stop for gas if u fill the tank full every time
October 19, 2015

algebra
You buy 10 gallons of ice cream for a party, how many cup sized containers can you fill with this?
September 30, 2015

physics
NASA launches a satellite into orbit at a height above the surface of the Earth equal to the Earth's mean radius. The mass of the satellite is 550 kg. (Assume the Earth's mass is 5.97 1024 kg and its radius is 6.38 106 m.) (a) How long does it take the satellite to go ...
September 27, 2015

algebra
What is the final grade for this student? (round to two decimal places) Quizzes = 5%, Exam 1 = 20%, Exam 2 = 20%, Lab Reports = 15%, Research Paper = 15%, Final Exam = 25% Lab Reports: 75,80,70,75,85,69,90,75 Quizzes: 85,60,70,0,75,80,80,80 Exam 1: 80 Exam 2: 70 Research Paper...
September 22, 2015

algebra
Julie the Jeweler has fifteen gold necklaces worth \$120 each, nine silver necklaces valued at \$90 each, ten plated necklaces valued at \$60 each and thirty beaded necklaces worth \$15 each. What is the average value of a necklace at Julie’s shop? (round to two decimal places)
September 22, 2015

algebra
An “A” is considered 4.0, a “B” is 3.0, a “C” is 2.0, a “D” is 1.0, and an “F” is 0. In your first semester you received the following grades. Calculate your grade point average English = credits 3.0 Grade = C Biology = credits...
September 22, 2015

algebra
On a quiz worth 5 points, four students earned a 5, seven students earned a 4, six students earned a 3, two students earned a 2, and one student earned a zero. Find the average score. (round to one decimal place)
September 21, 2015

algebra
A worker is exposed to 98 dB for five hours and 82 dB for a three hours, giving an eight hour working day. On average what noise level is this worker exposed to? (round to the nearest whole number)
September 21, 2015

Medical Term
I need some help with medical terms. I need to determine the word parts and the definition and I'm having a hard time with these 2. stomatoesophagogastroenterocolitis cardiosphygmopneumographologist
September 16, 2015

Math
An airplane is flying at an airspeed of 500 km/hr in a wind blowing at 50 km/hr toward the southeast. In what direction should the plane head to end up going due east? (Round your answer to two decimal places.)What is the airplane's speed relative to the ground? (Round ...
August 28, 2015

Chemistry
I don't know how to do Titration problems! I have an emergency homework assignment that's crucial to my grade! Please help with tips and step by step response! Please help!- 1. 50ml of 0.3 M KOH are required to titrate 60 ml of H^2SO^4. What is the M of the H^2SO^4? 2...
May 11, 2015

Math/algebra
If f = 21, the value has to be \$105 and if there are 70 bills and 21 are 5's that means 49 are 10's which is \$490. \$490 + \$105 = \$595! 😄 Thanks...this kind of stuff is hard for me.
May 5, 2015

Math/algebra
Post a New QuestionCurrent Questions Homework Help: Algebra Posted by Kristen on Tuesday, May 5, 2015 at 7:53pm. A bank teller counts her \$10 and \$5 bills at the end of the day. She has a total of 70 bills. The total value of the money is \$595. Let f represent the number of \$5...
May 5, 2015

Algebra
Reiny, thanks! I understand the difference between 5f and 5=f now - makes more sense! I forgot something from my original problem, though...it also says the bank teller has a total of 70 bills. Now what?!
May 5, 2015

Algebra
A bank teller counts her \$10 and \$5 bills at the end of the day. The total value of the money is \$595. Let f represent the number of \$5 bills. I have to write an equation that represents the total value of the money. I know f = 5 and 2f = 10 but I am stuck about what do do ...
May 5, 2015

physics
An object is projected from the surface of the earth with a speed of 2.73x10^4 m/s. What is its speed when it is very far from the earth? (Neglect air resistance).
March 24, 2015

pre-calculus
Use the rational root theorem with polynomial division if needed to find all the zeroes of:     P(x)=2x^4-3x^3+3x^2+5x-3.
March 20, 2015

Chemistry
How many liters of oxygen a@STP will produce 195 grams of diphosphorus pentoxide when reacted with sufficient phosphorus?- exact question. Could someone plz help I am confused and if you could help me put it in dimensional analysis.
March 8, 2015

algebra II
The following rational function describes concentration in blood of a certain medicine taken once depending on time, find a. the horizontal or oblique asymptote(s), if any, b. the vertical asymptote(s), if any, c. describe their possible meanings. f(x)=4/x+2
March 3, 2015

physics
Fnet= F1 + F2 Fnet=mass * acceleration +8.3+ F2= (4.5)a A) F2= (4.5)(+6.1) - 8.3 B) F2= (4.5)(-6.1) - 8.3 C) F2= 0 - 8.3
February 19, 2015

MATH
1: The table shows the low outside temperatures for Monday, Tuesday, and Wednesday. By how many degrees did the low temperature drop from Tuesday to Wednesday? 2) The table shows the low outside temperatures for Monday, Tuesday, and Wednesday. By how many degrees did the low ...
November 6, 2014

Health
It could be B.. Im not sure
November 6, 2014

English
Which sentence uses the demonstratives correctly? A. I have to get out of these wet clothes before I catch an awful cold. B. I have to get out of these wet clothes before I catch a awful cold. C. I have to get out of those wet clothes before I catch a awful cold. D. I have to ...
October 7, 2014

Physics =/
Fnet= F1 + F2 Fnet=mass * acceleration +5.6+ F2= (3.1)a A) F2= (3.1)(+5.8) - 5.6 B) F2= (3.1)(-5.8) - 5.6 C) F2= 0 - 5.6
September 26, 2014

physics
A cannon res a cannonball from ground level at an angle of 18 above the horizontal, and the cannonball lands on the ground some distance away. If the muzzle velocity of the cannon remains unchanged, at what angle should the cannon be red so that the cannonball travels ...
September 19, 2014

physics
A player kicks a soccer ball from ground level and sends it flying at an angle of 30 degrees at a speed of 26 m/s. How long was the ball in the air? Round the answer to the nearest tenth of a second.
September 4, 2014

physics
the 900 kg car was traveling south and collided with the 2000kg car traveling west. they both got tangled and moved away from the impact point as one mass at 16.0m/s in the direction 24degrees west of south. what was the initial speed of each prior to the collision?
August 11, 2014

physics
a car with a mass of 900kg and a car with a mass of 2000kg collide. one car is moved away from the impact point as one mass at 16.0m/s in the direction 24 degrees west of south. what was the initial speed of each car prior to the collision?
August 10, 2014

physics
a 62.0kg bungee jumper jumps from a bridge. she is tied to a bungee cord whose unstretched length is 12.0 m and falls a total of 31m a) calculate the spring constant k of the bungee cord and b) calculate the maximum acceleration she experiences.
August 10, 2014

physics
a family goes on vacation for a week and leaves on a fan that consumes electricity at the rate of 200 watts. If the electricity is \$0.14/kWh, how much does it cost to run the fan during this time?
August 9, 2014

physics
a 62.0kg bungee jumper jumps from a bridge. she is tied to a bungee cord whose unstretched length is 12.0 m and falls a total of 31m a) calculate the spring constant k of the bungee cord and b) calculate the maximum acceleration she experiences.
August 9, 2014

physics
a man throws his keys up to his wife 4.00m above. the wife catches the keys 1.50s later. with what initial velocity were the keys thrown?
July 25, 2014

physics
a roller coaster weighing 500kg starts at rest from a point of 45m above the ground. what is its speed when it reaches point b at ground level?
July 25, 2014

physics
thank you
July 25, 2014

physics
so mr.pursley the velocity doesn't matter for the question I asked?
July 25, 2014

physics
so the velocity doesn't matter for the question I
July 25, 2014

physics
what would the tension in a string be if the block being suspended by the string had a mass of 5.0kg the acceleration was 2.2m/s^2 and the velocity was 5.2m/s
July 25, 2014

physics
a force F is applied in horizontal to a 10kg block. the block moves at a constant speed 2m/s across a horizontal surface. the coefficient of kinetic friction between the block and the surface is 0.5. the work done by the force F in 1.5 minutes is?
July 23, 2014

physics
a force of 20N compresses a spring with a spring constant of 50N/m. how much energy is stored in the spring?
July 23, 2014

physics
pilots can survive radial acceleration up to 9g(88m/s^2). can a fighter pilot flying at a constant speed of 500m/s and in a circle that has a diameter of 8800 m survive to tell about his experience?
June 30, 2014

physics
a stone is thrown straight up from a 50m high building and hits the ground at a speed of 37.1m/s. What is the initial velocity and what is the maximum height above the ground that the stone reaches?
June 28, 2014

physics
a man stands on the roof of a 15.0m tall building and throws a rock with a velocity of magnitude 30.0m/s at an angle of 33 degrees above the horizontal. ignoring resistance calculate the horizontal distance from the base of the building to the point where the rock strikes the ...
June 27, 2014

physics
a long jumper takes off at an angle of 20 degrees with the horizontal and reaches a maximum height of 0.55 meters at mid- flight. how far did she jump?
June 27, 2014

Math
Your school is planning to put an aquarium with 30 fish in it in the main lobby. To accommodate this number of fish, the aquarium should be between 50 and 60 cubic feet of water. To help reduce costs, the surface area of the aquarium should be no more than 80 feet square. Do ...
May 1, 2014

Which one of these statements is true about a "bumper-to-bumper" warranty. A. Normal wear and tear is NOT covered by the warranty. B. All expenses except gasoline and routine oil changes are covered by the warranty. C. Every part and system is covered without ...
May 1, 2014

Duration
Find the duration of a 6% coupon bond making annual coupon payments if it has three years until maturity and a yield to maturity of 6.5%. What is the duration if the yield to maturity is 10.5%?
April 10, 2014

Finance
A bond currently sells for \$1,120, which gives it a yield to maturity of 5%. Suppose that if the yield increases by 25 basis points, the price of the bond falls to \$1,070. What is the duration of this bond?
April 10, 2014

math
(35/100)25 = 8.75 pounds of trim loss, then (80/100)8.75 = 7 pounds of cooking loss, so total loss is 15.75 pounds of meat. So total amount the chef has left to serve is 25-15.75 = 9.25 pounds
March 30, 2014

Please help Steve! This is due tomorrow and I have no idea how to figure this out!!!
March 17, 2014

Algebra
Nope.....I checked and it isn't a typo.
March 17, 2014

Algebra
Fiona and camila took a load of peaches to the farmers market. During the first hour , they sold 1/2 of the peaches plus 1/2 of a peach. In the second hour, they sold 1/3 of the remaining peaches plus 1/3 of a peach. In the third hour , they so,d 1/4 of what was left and 3/4 ...
March 17, 2014

Chemistry
How many grams of a 17.7% potassium sulfate solution would contain 419.9 g potassium sulfate? Answer in units of g
March 13, 2014

Chemistry
Write the equation for the dissolution of NH4NO3 in water. If 5.95 mol of NH4NO3 are dissolved, how many total moles of ions are produced? Answer in units of mol
March 13, 2014

Math
Sixty people, half of whom were females, were asked if they liked yogurt. Thirty-two of the people, including two-fifths of all of the males, said that they did like yogurt. How many of the females didn't like yogurt?
March 9, 2014

Math
A clock has a minute hand10 inches long. What is the distance traveled by the tip of the minute hand in 1 day?
March 9, 2014

Math
At one point on a mountain road, the elevation is 1250 meters. Three kilometers up the road, the elevation is 1610 meters. What is the average change in elevation for each hundred meters on this section of the road?
March 9, 2014

Math
I am thinking of a number. If I add a half, fourth, and a ninth of it together, I get a total of 62. What's my number?
March 9, 2014

Math
What is the weight of the snow I have to shovel off our sidewalk after a 6 inch snowfall ? Our sidewalk is 150 feet long and 3 feet wide.
March 9, 2014

Math
The sum of two fractions is 1 1/2. Their difference is 5/12. What are the fractions?
March 9, 2014

Chemistry
The half-life for the first-order conversion of A to B is 56.5 hours. How long does it take for the concentration of A to decrease to 10.0% of its original amount? Our professor has given us the answer - 188hr but I am not entirely sure how he got it.
February 23, 2014

Math
Alex makes a 14 inch diameter pizza, which includes a 1 inch crust. Donald wants to make a 10 inch diameter pizza with the same percent of crust as Alex's pizza. To the nearest tenth of an inch, approximately how wide will the crust be on Donald's pizza?
February 16, 2014

Geometry
How many distinct isosceles triangles exist with a perimeter of 99 inches and side lengths that are positive while numbers?
February 16, 2014

Math
Fred is closing a bank account t and wants to distribute the money among his grandchildren by giving each of them \$20. To do this Fred needs an additional \$62 . Instead he gave each grandchild \$17 and had \$7 left over. How many grandchildren does Fred have? How much money did ...
January 22, 2014

Math
A box contains 20 red balls and 40 green balls . Four balls are randomly selected from the box without replacement. What is the probability of selecting a red ball followed by a green ball and then another red ball followed by a green ball?
January 22, 2014

Math
Loretta's age now is twice John's age five years ago. In three years the sum of John's and Loretta's ages will be 50. How old are Loretta and John today?
January 22, 2014

Math
What is the smallest counting number n so that 375n is a perfect square?
January 22, 2014

Math
Coins numbered 1-200 are placed in a hat. What is the probability that a coin chosen at random out of the hat is a multiple of 6 or 9?
January 22, 2014

Math
What is the sum of the prime factors of 1260? For example, the sum of the prime factors of 20 is 9.
January 7, 2014

Math
How many terms are in the following sequence that follows? 3,7,11,....,439
January 7, 2014

Math
A car rental agency charges \$37.50 per day and \$0.23 per mile or fraction thereof to rent a car. How many miles can be driven in a day before the charge reaches \$100.00?
January 7, 2014

Math
A high rise apartment building has four elevators. Each elevator travels upward at an average rate of 18 feet per second. The elevator travels 12 feet from one floor to the next. Suppose you get on the elevator on the first floor and travel straight to the fiftieth floor ...
December 17, 2013

Math
Which set of factors of the number 420 has the least possible sum? Which set of factors of the. Number 420 has the greatest possible sum? Be sure that the two sets of factors both have a product of 420
December 17, 2013

Math
Nine consecutive odd whole numbers sum to 243. Find the sum if the first and last whole numbers in this nine-addend ser.
December 17, 2013

Math
How many numbers between 9 and 100 exist such that the product of the digits is treaters than the actual number?
December 17, 2013

Math
Find the whole number that meets all the following conditions 1. It is greater than 100 2. It is less than 200 3. It is 20 greater when rounded to the nearest 100 than when it is rounded to the nearest 10
December 17, 2013

Math
Find the greatest ten digit positive multiple of 12 using each digit once and only once.
December 9, 2013

Math
Find the next three values in the following sequence of numbers. -1,0,1,0,1,2,3,6,11,20,37
December 5, 2013

Math
Find the greatest ten digit positive multiple of 12 using each digit once and only once .
December 5, 2013

Math
Find six consecutive multiples of 6 whose sum is the least common multiple of 13 and 18.
December 5, 2013

Math
If f(x) = x^4 -5x^2 +4, for what values of x is the absolute value of f(x) not differentiable?
December 1, 2013

Math
The ratio of cats to dogs is 2:1 and the ratio of dogs to parrots is 15:2. In addition, the ratio of parrots to snakes is 3:1 and the ratio of snakes to turtles is 6:7. What is the ratio of cats to turtles?
November 20, 2013

Math
Four hoses are filling a pool. The first hose alone would fill the pool in 4 hours while the second hose takes 6 hours. The third hose and the fourth hose each take 8 hours to fill the pool. How long would it take to fill the pool if all 4hoses are turned on?
November 20, 2013

Math
Warren is riding his bike at 15 mph on a road adjacent to railroad tracks. A train traveling at 90mph in the opposite direction as Warren, takes 20 seconds to pass him. How long is the train?
November 20, 2013

Math
A projectile is launched from a cannon that sits 4 feet off the ground at an initial velocity of 120 feet/sec. Find the impact velocity.
November 14, 2013

English
Chose and drank?
November 14, 2013

English
Which word fits? Have officials chose/chosen the city for the next Olympics? The Greek gods and goddesses drank/drunk nectar.
November 14, 2013

Math (ms sue or Kuai pleas e help)
The "4" ranch is 7680 acres. It is a rectangle that is a mile longer than it is wide. What are the dimensions of the ranch?
November 13, 2013

Math
A ranch is 7680 acres. It is a rectangle that is a mile longer than it is wide. What are the dimensions of the ranch?
November 13, 2013

Math
A ball bounces 0.7 of the distance it is dropped. How many bounces will the ball make from a height of 1 meter if a bounce of less than 1 centimeter is to be ignored?
November 13, 2013

Math
Also, how do I find the maximum height?
November 12, 2013

Math
A projectile is launched from a cannon that sits 4 feet off the ground at an initial velocity of 120 ft/sec. Find the position function and how long is it before the projectile hits the ground? I got -16t^2 +120t+4 for my position function, but I'm not sure how to find the...
November 12, 2013

Calculus
Find two positive numbers that satisfy the requirements: "The product is 147 and the sum of the first number plus three times the second number is a minimum."
November 4, 2013

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