# Posts by tiffany

Total # Posts: 930

**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?

**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 x-axis

**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 10-3 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 747-400 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(x-3)

**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**

5p-7-2p=-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 half-life of carbon-14 is 5600 years. If a piece of charcoal made from the wood of a tree shows only 73% of the carbon-14 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 x-axis 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?

**Calculus-Steve**

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 ...

**Physics**

Sound of a certain wavelength is coming from within a room and passing through a rectangular door (a "slit"). If the width of the doorway is twice the wavelength of the sound, what is the diffraction angle è of the sound leaving the doorway? Please show me how...

**Math**

if 12 ft of ribbon is cut into pieces that are 2 1/4 ft long,how much ribbon is left over?

**Algebra 1**

On the second line where you put 3x^2+3x+1x+1 it should really be 3x^2-3x-1x+1 You just lost track of your negative

**Algebra**

x= -2 y= -6

**math**

Lee want to cut this piece of canvas into two rectangles that are 3×2 and 3×5. He wants the sum of the area of the two small rectangles to be the same as the area of the large rectangle. 6 feet across and 3 feet. Can he do this. Explain

**math**

Lee want to cut this piece of canvas into two rectangles that are 3×2 and 3×5. He wants the sum of the area of the two small rectangles to be the same as the area of the large rectangle. 6 feet and 3 feet. Can he do this. Explain

**Math**

If w is some number between 3 and 10, which of the following could be the average of the numbers 4,5,6,7,9 and w? (A)4.6 (B)5.1 (C)6.3 (D)7.9 (E)8.2

**Physics**

The earth has about 80 times the mass of the earth’s moon. The gravitational force exerted on the moon by the earth has what relation to the gravitational force exerted on the earth by the moon? 1. the same as 2. zero; the earth exerts a force on the moon,but the moon is ...

**math**

A piece of wire 34 cm long is cut into two parts. One part is to twice as long as other. how long is each part? solution pls..

**math**

May takes 12 hours to type a report. Her friend helps her and together they finish the job in 4 hours. How long would it take her friend had she worked alone? Representation: Equation: Solution: Conclusion:

**computers**

Wendy calls the help desk and reports that she is unable to access her files that are stored on the server. The network is a Windows Domain with Active Directory. Wendy is logged on locally to her workstation that runs Windows 8. You remote into her machine and you can ping ...

**english 10th**

How does an open question differ from a closed question?

**Math**

14