Posts by Tiffany
Total # Posts: 948

Physical Science
An 3000kh car traveling at 70 m/s takes 8 m to stop under full braking. The same car under similar road conditions, traveling at 140 m/s, takes 
Math
Alexis pours 3/4 cup of juice in 6 glasses. How many cups does Alexis have? 
Math
There are 21 white cars in the parking lot. These cars represent 35% of all the cars in the parking lot. How many cars are in the parking lot? 
math
Noah wants to display his 72 collectors flags.he is going to put 6 flags in each row.how many rows of flags will he have in his display? 
Math
. Which is a solution of 2 8 x 1 5 $ 11? 
Math
Fred had $140 dollars to spend on 7 books. After buying them he had 14 dollars. How much did he each book cost? 
Business Math
Exact interest method (365 days) and ordinary interest method (360 days) for $450 loan at 12.9% interest rate 220 days. 
Writing
Thank you, Reed! 
Writing
Expository writing prompt: Describe a family celebration that has special meaning for you. Please give me some feedback. Every year my uncle celebrates Christmas at his house. Unlike the common Christmas party where people hand out presents to other people, my family's ... 
Writing
Expository writing prompt: Why is diversity in a workplace important? Please give me some feedback. It is not uncommon to hear employers emphasize the importance of diversity in a workplace. Diversity is important in a workplace because it creates an environment where the ... 
Writing
Expository essay prompt: Describe the evolution of communication in the last 20 years since the advent of the Internet. Note: I wrote the essay in 15 minutes. Please give me some feedback and rate my essay from 1 (lowest to 5 ( highest). My essay: In today's world, it is ... 
Writing
The essay below is an expository essay and was written in 15 minutes. Please give me some feedback on my essay ( a score of 1 being the lowest and a score of 5 being the highest). Prompt: Explore how obesity affects a nation's productivity and economy. My essay: Americans ... 
math
assume 26 letters options and 10 digit options therefore: a) (26^4)(10^3)= 456 976 000 b) (26^3)(10^3)= 17 576 000 c) 10^6= 1 000 000 
Math
On a Science exam Rita answered 36 questions correctly and receive a score of 100% her friend answered 27 questions correctly what score did read her friend receive 
Physics
A record player rotates a record at 45 revolutions per minute. When the record player is switched off, it makes 5 complete turns at a constant angular acceleration before coming to rest. What was the magnitude of the angular acceleration (in rads/s2) of the record as it slowed... 
Algebra
A manuscript needs to be printed. One printer can do the job in 60 minutes and the other can do it in 40 minutes. How long would it take if both printers were used? 
Math
42 purple tiles 
College Algebra
Let f(x) = . Find a formula for a function g whose graph is obtained from f by the given sequence of transformations. (1) shift left 3 units (2) vertical stretch by a factor of 2 (3) reflect across the xaxis 
ENGLISH
WHICH DETAIL DO you not need in order to draw a conclusion 
math
the answer to this question is more than one is 345 346 347 348 349 350 351 352 353 and last but not least is 354 
math
when rounded to the nearest ten I am 350 what am i 
Chem
A sample of a substance (containing only C, H, and N) is burned in oxygen. 7.961 g of CO2, 1.164 g of H2O and 1.551 g of NO are the sole products of combustion. What is the empirical formula of the compound? 
math
the product of a number and 7 is at least 28. write and solve the inequality. 
Math
There are 3 boxes of tangerines. Each box has 93 tangerines. The tangerines will be divided equally among 9 classrooms. How many tangerines will each classroom get? 
Math
List these numbers from least to greatest 3/4,5/8,6/7,6/11,7/10,8/9, 
science
what is the specific gravity of a liter of water at 20 degrees celsius 
Social Studies
Which of the following did Andrew Jackson NOT do? A. Served in the South Carolina Militia B. Studied and practiced law in North Carolina C. Owned a store in Nashville, Tennessee D. Served as a Senator from Tennessee 
finance
teresa buys 100 shares of XYZ sock on margin at $20 per share. If the margin requirement is 45 percent, the interest rate is 10 percent, and she holds the security for 1 year, how much interest must she pay? 
6th grade Math
Thanks Mrs. Sue 
6th grade Math
Sorry, If 80% of the students know the Bus driver 
6th grade Math
Can someone help me with this problem? if 80% of students Dr. the Bus driver. there are 410 students how many know the Bus driver. My answer is 310. is this correct ____ _80___ 410 100 32,800 divided by 80 = 410 410  100 =310 
Ap chemistry
Calculate the concentrations of all ions present in the following solutions of strong electrolytes : 2.0 times 103 M AL2(SO4)3 
math
A scuba diver dove from the surface of the ocean to an elevation of 79 9/10 feet at a rate of 18.8 feet per minute. After spending 12.75 minutes at that elevation, the diver ascended to an elevation of 28 9/10 feet. The total time for the dive so far was 19 1/8 minutes. ... 
Physics
A cheetah can run approximately 100 km/hr and a gazelle at 80.0 km/hr. If both animals are running at full speed, with the gazelle 70.0 m ahead, how long before the cheetah catches its prey? 
Algebra
Please help me find the slope of the curve for these problems. I don't know how to solve it. 1. Y = x^3 at P(1,1) 2. Y= x^4/2 at P (1, 1/2) 3. Y = 8x^4  7x^2 + 5x +6 at P (1,2) 
English
Why did Raymond Carver make "Popular Mechanics" ending so ironically different from the Biblical tale "The Wisdom of Solomon"? 
Government
Who creates executive branch departments? The president or Congress 
Math
The wingspan of a Boeing 747400 is 64.4 metres. a. If a scale model is built to the scale 1:20, what would the wingspan of the model be in centimetres? b. If the wingspan of another model is 53 cm, find the scale of the model in the form 1:x. 
Social Studies
Why did the Pilgrims' government come about and why was its existence important. I know this has to do with the Mayflower Compact and was a formal method to establish systematic order among the Pilgrims but not sure why it came about and the importance. 
Chemistry
I got an exact answer of 940.485447 without rounding with sig figs till the end. Thank you for clarifying. 
Chemistry
Well 976°C. Minor calculation errors, but still. I do not know if this is correct or not. 
Chemistry
"Aluminum metal melts at 658.5°C. What would be the final temperature if 28.0 grams of solid aluminum at this temperature were placed into 520 grams of liquid aluminum at 1000.0°C? The heat of fusion for aluminum is 396 J/g, and the specific heat of liquid ... 
Algebra
Simplify 4√490k^2 
Algebra
Evaluate the function. h(x) = x^3 + 4x^2 ; Find h(x3) 
Brief Calculus
The demand function for a certain brand of CD is given by p = −0.01x2 − 0.2x + 12 where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. The supply function is given by p = 0.01x^2 + 0.5x + 3 where p is the ... 
Brief Calculus
The demand function for a certain make of replacement cartridges for a water purifier is given by the following equation where p is the unit price in dollars and x is the quantity demanded each week, measured in units of a thousand. p = −0.01x2 − 0.3x + 10 ... 
English
Underline infinitive phrase and how is it used A few prospectors brave enough to explore the frozen interior found gold in the summer of 1896. To explore the frozen interior adj 
Math
5p72p=3 
U.S. History
Which statement best describes one advantage the Confederacy had over the Union in the U.S. Civil War? A) The Confederacy's soldiers were better equipped for battle. B) The Confederacy's soldiers had more experience and better training. C) The Confederacy's ... 
Chemistry
For a particular isomer of C8H18, the following reaction produces 5104.1 kJ of heat per mole of C8H18(g) consumed, under standard conditions. (deltaH_rnx = 5104.1kJ) What is the standard enthalpy of formation of this isomer of C8H18(g)? 
Math
Four people want to cross a bridge. They all begin on the same side. It’s night time and they only have one flash light with them. At most two people can cross the bridge at the same time, and any party who crosses, either one or two people must have a flashlight with ... 
Math
Tommy has 5 jars. Each jar is 2/3 filled with marbles. How many full jars of marbles does tommy have ? 
math
if an invoice is dated april 25 and has credit terms of 3/15 ,n/45 , what is the last date on which the net amount of the invoice can be paid without incurring an penalty 
Math
Find the circumference of 15in and round your answer to the nearest tenth 
college algebra
The halflife of carbon14 is 5600 years. If a piece of charcoal made from the wood of a tree shows only 73% of the carbon14 expected in living matter, when did the tree die? 
Chemistry
Find the volume of 0.250M sulfuric acid necessary to react completely with 79.3g sodium hydroxide 
English
Ok I think I got it. The complete subject is taking the exam 
English
Taking is the verb 
English
there is the verb. helping verb is was am I close? 
English
taking the exam 
English
Please check my answer There was one student still taking the exam when the bell rang. Student is the subject and exam is the simple subject. 
Chemistry
Thank you! 
Chemistry
Calculate the mass of Fe(OH)3 s) produced by mixing 50.0 mL of 0.153 M KOH (aq) and 25.0 mL of 0.255 M Fe(NO3)3 (aq), and the number of moles of the excess reactant remaining in solution. I got 0.00383 mol Fe(NO3)3 remaining. I don't know how to obtain the mass of Fe(OH)3... 
Chemistry
Identify the excess reactant (HCl or NaOH) and its molar concentration when 1.55 g of NaOH is stirred into 150.0 mL of 0.250 M HCl. 
Chemistry
Calculate the mass of Fe(OH)3 s) produced by mixing 50.0 mL of 0.153 M KOH (aq) and 25.0 mL of 0.255 M Fe(NO3)3 (aq), and the number of moles of the excess reactant remaining in solution. I got 0.242 g Fe(OH)3 and 3.83 mmol Fe3+ remaining. 
phsyics
The block shown in figure below lies on a smooth plane tilted at an angle è = 21.5° to the horizontal. Determine the acceleration of the block as it slides down the plane. Ignore friction. 
Chemistry
How do you write the complete ionic equation and net ionic equation for ammonium chloride and copper (II) sulfate in water? 
Chemistry
How do you write the complete ionic equation and net ionic equation for ammonium chloride and copper (II) sulfate in water? 
Chemistry
I still don't get this problem! Toxic chemicals in drinking water usually are reported and a safety level specified in units of parts per million (ppm) by mass. What is the molar concentration of arsenic in a water sample that has 1ppm arsenic (As)? My teacher's work... 
Sheridan Road stem
Write 16/40 in simplest form explain your work??? 
Chemistry
how many grams of baking soda is needed to neutralize 500ml of hydrochloric acid ? 
Calculus
What is the average value of f(x) on [0,4] if the area between the graph of f (x) and the xaxis is equal to 12? I used the average value formula and got 12. But the answer key says 3. My work: M= 1/4 [12x] interval: [0,4] 48/4=12 
Chemistry Dr.Bob
Toxic chemicals in drinking water usually are reported and a safety level specified in units of parts per million (ppm) by mass. What is the molar concentration of arsenic in a water sample that has 1ppm arsenic (As)? DrBob222 1 ppm = 1 mg/L and although that isn't by mass... 
Chemistry
Toxic chemicals in drinking water usually are reported and a safety level specified in units of parts per million (ppm) by mass. What is the molar concentration of arsenic in a water sample that has 1ppm arsenic (As)? 
Algebra
Tameen keeps quarters, nickels, and dimes in his change jar. He has three more quarters than dimes and five fewer nickels than dimes. If there are 52 coins in the change jar, how many dimes are in the jar? 
CalculusSteve
Find the area of the region between the graphs of f(x)=3x+8 and g(x)=x^2 + 2x+2 over [0,2]. I got 34/3. Calculus  Steve ∫[0,2] (x^2+2x+2) dx = 1/3 x^3 + x^2 + 2x [0,2] = 8/3 + 4 + 4 = 32/3 Why are you taking the antiderivative of x^2 +2x+2 when we are trying to find the... 
Algebra
Ticket sale for a music concert was $2,160. Three times as many tickets were sold for the Saturday night concert as were sold for the Sunday afternoon concert. Two times as many tickets were sold for the Friday night concert as were sold for the Sunday afternoon concert. ... 
Algebra
The perimeter of MNO is equal to the perimeter of square ABCD. If the lengths of the sides of the triangle are represented by 4x + 4, 5x  3, and 17, and one side of the square is represented by 3x, find the length of a side of the square. 
Calculus
Find the area of the region between the graphs of f(x)=3x+8 and g(x)=x^2 + 2x+2 over [0,2]. I got 34/3. 
Physics
A married couple is driving on a dark road at night at the rate of 98.0 m/s until they see a clown 50m in front of them and slam the brakes to slow the car down to 10.0m/s and still manage to hit the clown. How much time would the clown have had to move before being roadkill? ... 
math
Triangle ABC is congruent to triangle xyz.write congruence statements comparing the corresponding parts.then determine which transformations map ABC onto xyz 
Chem
I did the calculation and I got 4.32 X10^44. Is that correct? 
Chem
A pure silver ring contains 2.60X10^22 silver atoms. How many moles of silver atoms it contain? 
Math
At the amusement park, you decide to ride the Ferris wheel, which has a maximum height of 50 meters and a diameter of 35 meters. It takes the wheel 5 minutes to make one revolution. If you start your ride at the midline and the ferris wheel rotates counter clockwise, how many ... 
Science 207
Discuss the potential effect of each contaminate oil,vinegar,and detergent on the towns water source and the peopleasure who drink the water 
Computer Science
A public transport company provides three types of transports to its passengers to travel from city A to city B of different state. The three types of transports are train, bus and taxi. Each transport has different charges and maximum seats limit. The table below shows the ... 
algebra
A soccer field has an area of 312 square yards. Its length is 2 yards longer than twice its width. Find the width of the soccer field. 
math
how to cut a 10 ft board into 9 smaller boards 
Statistics
The estimate of the population proportion is to be within plus or minus 0.06%, with a 99% level of confidence. The best estimate of the population proportion is 0.22. How large a sample is required? Round answer to the next whole number. 
Bus 308
The z score will be comparatively large 
chemistry
What is the volume occupied by 0.738g of xenon gas at STP? 
Math
The two numbers are 63.36 and 7.04 
geometry
A small airplane takes off from point A and continues to climb upward in a straight line, as shown in the diagram. What is the plane’s distance from point A when it reaches point C 
Math
a 6,000 seat theater has tickets for sale at $26 and $40 . How many tickets must be sold at each price for a sell out performance to generate a revenue of $190500? 
Chemistry
1. Iron oxide and carbon monoxide react according to the following equation . Identify which reactant is limiting and which is excess if 43.5 grams of Fe2O3 reacts with 43.5 grams of CO Fe2O3 + 3CO2 > 3CO2 + 2Fe 2. Calculate the percent yield of Carbon dioxide if 20.0 ... 
Chemistry
What is the empirical formula for a compound that is 1.67g Ce and 4.54g I? 
Math
Hello! I need help with this question. I know that I'm using the Law of Sines, but I'm confused on how to solve. I have to also round my answers to the nearest tenth for degrees and to the nearest hundredth for sides. Thanks! Given: A = 60 degrees a = 9 c = 10 Find: b... 
Math
@ms sue? 
Math
The function f(x) = x^2 2x + x^1/2 is: A. A polynomial because it is continuous. B. A polynomial because it is of the form axn. C. Not a polynomial because you are subtracting 2x. D. Not a polynomial because you can’t have any fractional exponents. Is the answer D? 
Physics 202
A rail gun uses electromagnetic forces to accelerate a projectile to very high velocities. The basic mechanism of acceleration is relatively simple and can be illustrated in the following example. A metal rod of mass 10.0g and electrical resistance 0.100Ω rests on ...