Total # Posts: 353

Chemistry
During a Breathalyzer Test it was determined that 1.60mg of K2Cr2O7 was consumed by the above reaction. Calculate the number of milligrams of ethanol in the test sample.

science
a mechanic applies the force of 50 N at a distance of 40 cm from the pivot on a wheel wrench . what is the size of the moment ?

Calculus
Please check, if there is something wrong please explain what I did wrong. Thank you! Calculate the d^2y/dx^2. y= e^-x + e^x y' = e^x - e^-x y'' = e^x + e^-x Find the x-coordinace of all critical points of the given function. determine whether each critical point ...

Vertex, Focus, & Directrix of Parabolas
identify the focus,directrix,and axis of symmetry of f(x)= 1/16 x^2

chemistry
If you dissolve 236.5 g of (NH4)3PO4 and 166.9 g of K3PO4 in enough water to make the volume of the solution 505.0 mL What is the molarity of ammonium ions and phosphate ions?

Health JUST NEED ANSWERS CHECKED :)
1.true 2.true 3.false 4.true 5.false 6.true 7.true 8.true 9.false 10.true

Physics
At t=0 a grinding wheel has an angular velocity of 24.0rad/s . It has a constant angular acceleration of 35.0rad/s2 until a circuit breaker trips at time t = 1.90s . From then on, it turns through an angle 436rad as it coasts to a stop at constant angular acceleration. Through...

Math
F(x)=2sin(3x/2-3pi/4)+2

Math
Solve the given quadratic equation exactly using the quadratic formula. Write the solutions in its simplest form. Using a calculator, determine all irrational solutions to the nearest thousandth. Separate the solutions with a comma and list the smaller one first. For the ...

Math
In mr.kingmans math class four fifths of the stundents earned an a on their math exam.the rest of the class earned a b .what percent of the class earned an a ? WhAt percent of the class earned a b

PHYSICS
Two dogs pull horizontally on ropes attached to a post; the angle between the ropes is 62.0∘. Dog A exerts a force of 270N , and dog B exerts a force of 302N . Find the magnitude of the resultant force. Find the angle the resultant force makes with the rope of dog A.

PHYSICS
A dockworker applies a constant horizontal force of 71.0N to a block of ice on a smooth horizontal floor. The frictional force is negligible. The block starts from rest and moves a distance 10.0m in a time of 5.50s . If the worker stops pushing after 5.50s , how far does the ...

Chemistry Help
1. Spectroscopic studies of the reaction of azide ion with the cluster [Ru3(CO)12] in acetone solvent confirmed the occurrence of process (i) under a CO atmosphere. Kinetic measurements of this rapid [Ru3(CO)12]+ N3– →[Ru3(NCO)(CO)11]–+ N2(i) reaction revealed ...

ENG1511 ENGLISH
Good Day, Please help Correct the following sentences for subject verb-agreement, tense or fragment. When he thought he could afford to pay his own school fees. Going home now, how I wish I could get there before it starts to rain. I am writing my homework after every class

ENG1511 - english
Good Day, Please help Either subject verb-agreement, tense or fragment. When he thought he could afford to pay his own school fees. Going home now, how I wish I could get there before it starts to rain. I am writing my homework after every class.

Physics
1. How is average speed related to instantaneous speed? What certain conditions must be met for the two variables to have the same or close value? 2. Cite one practical example on the use of the concepts of instantaneous speed, average speed in observing safety on the road.

Physics
Dina walked North and East and has a resultant displacement of 125, 35^0 East of North. She has a velocity of 2.5 m/s. Compute her walking time and average speed.

Physics
1. A person runs 800. m at an average speed of 6.00 m/s and then the next 800. m at an average speed of 8.00 m/s. Calculate (a) the total time of travel and (b) the average speed. 2. Sam travels by car from one city to another. He drives for 45.0 min at 95.0 km/h, 30.0 min at ...

Physics
On the way to class, you walk north and then west such that your resultant displacement is 290 m in a direction 25deg west of north. Your average velocity is 2.0 m/s in the same direction as the displacement. Calculate (a) your walking time and (b) your average speed.

Math
Compare and contrast the solutions of ax^2 + h = 0 to the solutions of ax^2 = h, where a and h are positive.

Math
1. What is the tenth term of the geometric sequence whose first term (a1) is 16 and the common ratio (r) is –½? 2. Given the terms a10 = 3 / 512 and a15 = 3 / 16384 of a geometric sequence, find the exact value of the first term of the sequence.

Math
Given: ________, – 243, – 226, – 209, – 192, – 175, … The 67th term of the sequence is __________. The series of the first 27 terms of the sequence is __________.

Math
– 11 is the __________ term of the arithmetic sequence – 847, – 836, – 825, – 814, – 803, …

Physics
A person runs 800. m at an average speed of 6.00 m/s and then the next 800. m at an average speed of 8.00 m/s. Calculate (a) the total time of travel and b) the average speed.

Math
Find the value of x so that 3x – 2, 2x – 1 and 4x – 3 form an arithmetic sequence.

Math
Black Eyed Peas’ 2011 Live Concert is to take place in a circular park. Due to the shape of the area, seats are set up so that the innermost row has 64 seats and each successive row has 17 more seats than the row before it. The park’s open area can accommodate 17 ...

science
the answers if your in connuexs is B D D A A

college math
The area of a wetland drops by 15 every 9 years. What percent of its total area disappears after 45 years?

Physics
What would be the total distance traveled?

Physics
A stone is thrown in the air with an initial velocity of 50 m/s at 37 degrees to the horizontal. Find the total time the ball is in the air.

math
No , because a product is the answer to a multiplication or division problem , and 6 can't be a multiple in a problem if it's the product or answer

Physics
The rope forms a triangle with the pole and the angle is between the rope and the point at which it connects to the pole.

Physics
A carnival seat and a passenger has a combined weight of 193. As the seat is spun on a 18m rope tethered to a pole at an angle of 59.2 degrees, at what speed is the seat traveling?

Finance
Find the APR, or stated rate, in each of the following cases EAR: 12.4 semianually 13.3 monthly 11.0 weekly 14.7 infintely

English
Thank you, Tyler and Ms. Sue.

English
present

English
Selina Sanchez, together with her colleagues, ________ a competitive market research model for other businesses to follow. (Points : 1) present presents

science
what is the answer? a,d,or b?

English
are

science help plzzz
If you go to connections, and you're on unit 2, lesson 8 in Science, Megan and Love are right. I got 100%, I swear!

Science
1. B

Physics
A ball has an initial velocity of -23m/s. If the ball has a new velocity of 76m/s after 27 seconds, what is the ball acceleration

math
If Julie bought 8 T-shirts, she would be short \$28. If she bought 4 T-shirts and 3 baseball hats, she would have \$17 left. If each hat cost \$5, how much money did she have in the beginning?

math
Laundry- detergent \$7.99 T Flower- bouquet \$3.99 T, A grocery store receipt shows 5% state tax due on laundry detergent and a flower bouquet. Does it matter whether the tax is calculated on each separate item or the total cost? Explain.

math
Sarah bought 8 folders and 3 rulers. Lea bought 8 rulers and 3 folders. Sarah paid \$1.25 more than Lea. How much was each folder if each ruler was 45 cents?

math
Stephen drove at a constant speed from Town X to Town Y at 9 A.M. yesterday. Half an hour later, Cole drove from Town X to Town Y at a constant speed that was 30km/h faster than Stephen's. By 9:30 A.M., Stephen traveled 40 km. Cole caught up with Stephen at Town Y, ...

math
What is 20 divide by 6400?

math
Stephen drove at a constant speed from Town X to Y at 9 A.M.yesterday. Half an hour later Cole drove from Town X to Y at A constant speed that was 30 km/h faster than Stephens. By 9:30 A.m, Stephanie had already traveled 40 km. Cole caught up with Stephen at Town , arriving at...

math
This year the Sum of Mr. Bellinis age and his son's age his son's age is 38 years. 4 years ago, Mr. Bellini was 5 times as old as his son. How old is his son this year? How old is Mr. Bellini this year?

math
When dividing 0.08 by 0.4 I come up with 5, but I need to show it in a graph. I can't figure out how to do this

thank you
Thanks for your help Jai. ;)

math
This year, the sum of Mr. Bellini's age and his son's age is 38 years. 4 years ago, Mr. Bellini was 5 times as old as his son. How old is his son this year? How old is Mr. Bellini this year?

math
Thank you so much Steve. :)

math
Deepak is 10 years old, and his brother is 7 years old. In how many years time will their total age be 41.

SS
wow had the same questions on my quiz and got them all right

solve algebra equation
32.1=a-21.8

Chemistry
The post that I followed for #1 ended up with the wrong answer

Chemistry
A 16.0 g sample of a compound known to contain 3 ion species is dissolved in 100. g of water. The boiling point of the solution is 103.1°C. What is the molar mass of the compound?

Chemistry
Hard ball candy is prepared from boiling an aqueous sugar solution that has a boiling point of 260.°F. What is the molality of this solution?

Chemistry
What is the freezing point of a solution of sucrose (table sugar), a nonelectrolyte, that contains 60.0 g of C12H22O11 dissolved in 413 g of water?

Chemistry
A solution is made by mixing 90.6 g of magnesium sulfate heptahydrate with 2320.0 g of water. 690.00 mL of the solution has a mass of 745.20 g. What is the molarity of the magnesium sulfate solution?

Chemistry
If you are making 230.0 mL of 2.70% (m/m) CuSO45 H2O, how many grams of the solute should you use?

Trig
Suppose a CD player makes 48 revolutions per minute. Through how many degrees will a point on the edge of a CD move in 1 minute? In 2 sec?

Trig
A tire is rotating 600 times per minute. Through how many degrees does a point on the edge of the tire move in 1 minute?

Chemistry
A tire is rotating 600 times per minute. Through how many degrees does a point on the edge of the tire move in 1 minute? In 1 second?

Chemistry
Suppose a CAV player makes 48 revolutions per minute. Through how many degrees will a point on the edge of a CD move in 1 minute? In 2 sec?

Math
What is 36 over 156 in simplest form?

statistics
Let x and y be the amounts of time (in minutes) that a particular commuter must wait for a train on two independently selected days. Define a new random variable w by w = x + y, the sum of the two waiting times. The set of possible values for w is the interval from 0 to 2a (...

thank you so much!

1.D 2.A?

I still need help on 1 and 2. Identify the object of the preposition in each of the following sentences. 1. Ashley and her father arrived home from work. a. and b. father c. from d. work 2. Ashley put her journalism books in the new bookcase. a. bookcase b. put c. new d. in ...

thank you but I'm still confused on 1 and 3 could you explain why its not from and in.

I need a good grade in grammar so please check my answers! Identify the object of the preposition in each of the following sentences. 1. Ashley and her father arrived home from work. a. and b . father c. from d. work 2. Ashley’s bedroom was across the hall. a. bedroom b. ...

Calculus
Find dy/dx by implicit differentiation for x^2 - 2xy + y^3 = C

Chemistry
How many grams of CuSO4 * 5H2O are needed to prepare 100mL of a 0.10 M solution ?

Chemistry
Identify the atom that increases in oxidation number in the following redox reaction. 2MnO2 + 2K2CO3 + O2 2KMnO4 + 2CO2 *A.) Mn B.) O C.) K D.) C Please show work Thank you.

Ms. Sue the answers are right under 19, It says answers and I listed my them. Thank You MathMat.

Questions: 3. Paella is a dish like tacos. a dish made of rice, seafood, and vegetables eaten in Spain. another name for enchiladas. 4. Fast-food restaurants in the Spanish-speaking world are generally very popular with adults. look similar to the ones in the United States and...

Us History
How did social responsibility of businesses change during the Great Depression era?

Calculus
Determine convergence or divergence for the following series. State the tests used and justify your answers. Sum (infinity, n=1) 1/(1+e^-n) Sum (infinity, n=1) (2*4*6...2n)/n! Sum (infinity, n=0) (n-6)/n Sum (infinity, n=0) (n-6)/n! Sum (infinity, n=0) (100n^14)/4^n

Calculus
Determine convergence of divergence. If convergent, find the sum. Sum (infinity, n = 0) (e/pi)^n

Spanish 1
Complete the sentences with the correct form of ir. todos Los Dias, yo ____ a la escuela

English
period is right

math
Which units would you use to measure the area of a rectangle with L=1m and W=34 cm? Explain

math
i write out all the whole numbers,starting from 1,If i wrote 1994 digits altogether,what was the last complete number i wrote down

math
what is the interior angle of a regular polygon

Tbh, I dont know what '6th Grade' is. Im in year 7. I dont know if they are the same but yeah. Anyway for ratio and proportion we do questions like this: 1 cubic metre of garden soil weighs 1200kg. 10% of the soil is water. The rest is compost, manure and stone. The ...

math
Write the fraction in the simplest form. 12/56: 3/30: 5/25: 9/39: 6/54: 2/100: 8/18: THANKS

math

math
Jeremy collected nickels for one week. He is making stacks of his nickels to determine how many he has. The thickness of one nickel is 1/4 in. How tall is a stack of 4 nickels? 3 nickels, 2 nickels?

Math
Is yo last name akres/ acres, or Whatever.

Science, Heat Transfer

Science, Heat Transfer
list 3 forms of radiation from the sun. how are they alike. how do they differ?

math
infinite

if for one row she needs 3red 6yellow and 3white, then for 8rows, 8x3 8x6 and 8x3= 24, 48, 24. :)

its urgent math i need the answer fast
first how many units?

Algebra 1
40 bicycles

math
Aha tragiccccc

Geometry
a baseball diamond is a square 27 cm on a side. how far is the homeplate from the second base?

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