# Posts by Amanda

Total # Posts: 2,598

**physics**

Tammy leaves the oﬃce, drives 43 km due north, then turns onto a second highway and continues in a direction of 30◦ north of east for 80 km. What is her total displacement from the office? and At what angle is her displacement? (Consider east to be 0◦ and ...

**Math/Chemistry PLS HELP**

Find the absolute and percent relative uncertainty and express each answer with a reasonable amount of significant figures. 9.2(+ or -0.7)*(0.0054(+-0.3)+0.0056(+-0.7) The Algebraic answer: 0.1012 Absolute error? Relative error %?

**Health**

The answer is A. Added sugars are sugars and syrups that are added to foods or beverages when they are processed or prepared. This does not include naturally occurring sugars such as those in milk and fruits.

**Chemistry 314**

Five mineral samples of equal mass of calcite, CaCO3 (MM 100.085) , had a total mass of 12.4 ± 0.1 g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.) (Input...

**chemistry**

A volume of 29.62 ± 0.05 mL of HNO3 solution was required for complete reaction with 0.8896 ± 0.0008 g of Na2CO3, (FM 105.988 ± 0.001). Find the molarity of the HNO3 and its absolute uncertainty. I have the molarity of HNO3 = 0.5667

**Chemistry**

A volume of 29.62 ± 0.05 mL of HNO3 solution was required for complete reaction with 0.8896 ± 0.0008 g of Na2CO3, (FM 105.988 ± 0.001). Find the molarity of the HNO3 and its absolute uncertainty. I have the molarity of HNO3 = 0.5667

**Chemistry**

Five mineral samples of equal mass of calcite, CaCO3 (MM 100.085) , had a total mass of 12.4 ± 0.1 g. What is the average mass of calcium in each sample? (Assume that the relative uncertainties in atomic mass are small compared the uncertainty of the total mass.) (Input...

**calculus 1**

THANK YOU!!!!!

**calculus 1**

If you can program a calculator or computer, estimate the length of the curve f(x) on the given interval using largest n's. f(x)=56cos(x), for x is greater than/equal to 0 and x is smaller than/equal to pi/2.

**Chemistry 314**

What NaCl concentration results when 254 mL of an 0.880 M NaCl solution is mixed with 412 mL of a 0.450 M NaCl solution?

**Chemistry**

I figured it out thanks to related questions.

**Chemistry**

75.0 mL of a 1.80 M solution is diluted to a volume of 258 mL. A 129-mL portion of that solution is diluted using 187 mL of water. What is the final concentration?

**Chemistry**

75.0 mL of a 1.80 M solution is diluted to a volume of 258 mL. A 129-mL portion of that solution is diluted using 187 mL of water. What is the final concentration?

**Structured English Immersion**

How can the continuum of strategies be used inappropriately in the classroom?

**algebra 2**

Tickets for the hamiltons high school's summer play are $3 for students and $5 for non-students. on opening night 937 tickets were sold and $3943 is collected. How many tickets were sold to students? non-students?

**geography**

A stream has jumped its banks and is starting to flow through a formerly dry prairie. Trees are beginning to take root near the riverbed and are starting to develop a canopy. Explain what you believe will happen to the native grass that has flourished in this spot up until now...

**math**

You have an aquarium for your new pet, “Shamu” the killer whale, that contains 100,000 pounds of ocean water with a salinity of 30 o/oo. a. Calculate how many pounds of salt are currently in the aquarium. b. You think Shamu may be allergic to salt, so you decide to ...

**Social Studies**

YES FOR SURE

**Science**

How gravitational acceleration is used to benefit mankind and the environment. How can rural people also benefit from thr use of gravitational acceleration?

**Health**

Its d. Reduce daily sodium intake to less than 2,300 milligrams (mg) and further reduce intake to 1,500 mg among persons who are 51 and older and those of any age who are African American or have hypertension, diabetes, or chronic kidney disease.

**Hea;th**

The answer is D. Currently, many of the foods and beverages Americans eat and drink contain empty calories – calories from solid fats and/or added sugars. Solid fats and added sugars add calories to the food but few or no nutrients.

**SPANISH**

Change the following constructions to an adjetivo posesivo and noun according to the example: Example: la mesa de ella su mesa 1. el gato de Juan y María 2. las sillas de ti 3. el hermano de mí 4. la computadora de tu y yo 5. la mesa de usted 6. la mesa de ...

**design**

Have I the write answer so far? 1a 2b 3b 4b 5c 6d 7D 8d

**chemistry**

What is the molarity of a solution containing 18.0 g of KCl in 354 mL of solution?

**Principles of Management - Strategic Management**

please review my answers! 1. which of the following is an example of an internal stakeholder of an organization? A) distributors B) suppliers C) Unions D) Individual Workers It is: D) Individual Workers 2. Two drug companies agree to work together to pool their research and ...

**Writeacher maybe you can help ? Principles of Management - Effective Management**

Are you a business expert? I saw your responses under the business catagory?

**Principles of Management - Effective Management**

Do you know of a Business Expert on here that could also double check my work?

**MS. SUE HELP! Principles of Management - Effective Management**

I am trying to enter the corse work today, please help!

**Principles of Management - Effective Management**

Please double check my answers please! 1. a team manager is resolving the conflicts that exist among the members of his team in an organization. this is an example of: a. planning b. organizing c. leading d. controlling answer C 2. a manager at a grocery store is trying to ...

**College Math**

Write the mixed number as an imprper fraction. 7 1/9 = A. 64/9 b. 22/3 c. 7/1 d. 65/9 I think the answer is A.

**math**

If the graph x squared + y squared = c contains the point (-3,5), then c = ?

**Math**

A line segment begins at point (3,4) and has a length of 13 units. What are the possible endpoints of this line segment?

**Math**

the perimeter of an equilateral triangle is 50 inches longer than the length of one side. What is the length of one of the sides?

**chemistry**

how many grams of c2h6o contain the same number of oxygen atoms as 0.75 mol of h2o?

**Math**

Find how much interest $15,000 earns in 4 years in a certificate of deposit paying 8.5% interest compounded quarterly.

**vocabulary**

is the indirect definition of gloomy, dismal or depressing? please help.

**physics**

A rock is tossed straight up with a speed of 29m/s. When it returns, it falls into a hole 13m deep. Solve for rock's velocity as it hits the bottom of the hole. &How long is the rock in the air, from the instant it is released until it hits the bottom of the hole?

**child care**

be able to acquire most of your equipment from free and inexpensive sources

**Physics**

A sheet of siding has a centrally-located doorway of width 2.0 m and height 6.0 m cut out of it. The sheet, with the doorway hole, has a mass of 264 kg. (a) What is the x coordinate of the center of mass? (b) What is the y coordinate of the center of mass? Assume the lower ...

**Busniess English - Negative and Persuasive Message**

Which sentence presents an alternative in appropriate way? a. "The 11 a.m. flight is completely sold out, so I booked you on the 2 p.m. flight. Hopefully that will work for you." b. "We are out of the red units, so we went ahead and shipped you 12 green ones ...

**business english -**

Thank you so MUCH!

**business english -**

Indicate the alternative that both correctly evaluates the following sentence and correctly explains the reason for the evaluation. "As soon as you provide your date of birth on Line 2, your application for a flexible spending account will be processed." a. Good ...

**Business English - WRiting to build goodwill**

C. Main idea(s), background information, negative elements, benefits, goodwill ending.

**Business English - WRiting to build goodwill**

4. A 11. C 19. B

**Business English - WRiting to build goodwill**

Can someone double check my answers? 1. Which way of askin for action carries the highest level of politeness? A. a polite order B. an indirect request c. a question d. an order answer is: c. a question 2. Which of the following statements most effectively applies you-attitude...

**Business English**

I thought I updated this, however I entered my answers that I stated above for my grade. I got 17 out of 20 correct, the wrong answers were: 4. It should of been C. 11. Should of been D. 12. Should of been B.

**Business English "Designing the page and ect"**

Please double check my answers for me. 1. The appearance of a document can do all of the following except: A. establish rapport with the audience. B. guide your readers' attention C. substititue the written text in the document. D. Build goodwill. answer: C. Substitute the...

**business english**

I had originally answered D however the exam stated that was wrong, Im trying to retake it and I am still coming back to D but I don't want to get the answer wrong again.

**business english**

User: Which of the following is NOT an example of parallel structure? A. "Yoga can help you develop flexibility, reduce stress, and increase relaxation." B. "Learn how to analyze business audiences, improve your style, and edit thoroughly." C. "You are...

**biology i need help urgent**

what characteristic distinguishes arthropods from other invertebrates? a. the colem b.the endoskeleton c.jointed appendages d.bilateral symetry

**biology**

what is a notochord, and what is the notochord surrounded by

**Busniess English**

Select the correct punctuation to place on the line. Gusty winds damaged several power lines__ therefore, no one in our town has electricity. A. : B. ; C. - D. .

**chemistry**

mass of crucible- 18.50g mass of crucible+hydrate- 19.50g mass of crucible+anhydrous salt 1st heating- 19.10g mass of crucible+anhydrous salt 2nd heating- 19.10g Questions: 1. calculate mass of water lost from your sample 2. calculate % of water in sample CuSO4*5H2O 3. ...

**Management**

Which of the following statements about Maslow's needs hierarchy is correct? A. Esteem needs must be satisfied before one strives to fulfill social needs. B. Self-actualization is a growth need. C. safety needs are more basic than physiological needs. D. Social needs are ...

**finance**

A corporation has a total of $500 million and 100 million shares outstanding. It's ROE is 15%. Calculate the EPS. I know the EPS= ROE x Book value per share How do I find the book value

**Chemistry**

You want to prepare a pH=4.50 buffer using sodium acetate and glacial acetic acid. You have on hand 300 mL of 0.100 M sodium acetate. How many grams of glacial (water free) acetic acid should you add to prepare the buffer? (Ka of acetic acid is 1.8e-5 at: 25 degrees Celsius)

**Chemistry**

You want to prepare a pH=4.50 using sodium acetate and glacial acetic acid. You have n hand 300 mL of 0.100 M sodium acetate. How many grams of glacial acetic acid should you add to prepare the buffer? (Ka of acetic acid is 1.8e-5 at: 25 degrees Celsius)

**math**

i the conveyor belt takes 54 seconds to move gravel from the bottom of the conveyor belt to the tope at a rate of 3 feet per second, how high does the conveyor belt lift the gravel?

**geometry**

in the diagram below of triangle TEM, medians line TB, line EC and line MA intersect at D, and TB = 9. Find the length of TD.

**geometry**

in the diagram below of triangle TEM, medians line TB, line EC and line MA intersect at D, and TB = 9. Find the length of TD.

**business english**

Select the correct punctuation to place on the line. I found an inspiring bumper sticker with a quote from Mahatma Gandhi_"Whatever you do will insignificant, but is very important that you do it." a. : b. ; c. - d. .

**physics**

a bus engine can operate at very high temperatures . if one of the cylinders has a volume of 1 litre and is initially at 25°C and atmospheric pressure , what is the temperature when the gas in the cylinder is reduced to a volume of 100cubic centrimeters and pressure of ...

**Chemistry**

What is the pressure of a sample of Chlorine gas if the gas sample contains 0.25 moles of Chlorine and has a volume of 150 L with a temperature of 25 K?

**Chemistry**

what do i plug in for v2 and p2 then?

**Chemistry**

p1v1/t1=p2v2/t2 (5)(100.0)/510=...

**algebra**

-71+square root of 1/142 simplify

**math**

x^2+x+3=0

**math**

30d^2+71d+42=0

**math**

4x-y=7 5x+y=20

**math**

1/5x+y=2 x-10++-5y

**math**

2x^-15y^15/x^20y^-10

**math**

A box with no top is to be constructed from a piece of cardboard whose width measures x cm and whose length measures 6 cm more than its width. The box is to be formed by cutting squares that measure 2 cm on each side from the four corners, and then folding up the sides. If the...

**math**

the printed matter on a 18 by 22 centimeter page of a book must cover 96 square centimeters.If all margins are to be the same width, how wide should they be?

**math**

3x+8 over 5 + 7/5= -7x over 4

**math**

a/5-1/5=-6

**Physics**

how do you know what to plug into the equation?

**Physics**

Two positive charges with the same magnitude are one meter apart. Find the magnitude of the charges if the force between them is one Newton.

**english speech**

Speech please

**Amortization of Loans**

A car is purchased for $9,192.57 with $1470 down and a loan to be repaid at $200 a month for 2 years followed by a balloon payment. If the interest rate is 6% compounded monthly, how large will the balloon payment be?

**Probability**

From a box containing 7 blue, 5 red, 3 green, and 9 yellow marbles, 2 are drawn one at a time without replacing the first marble before the second marble is drawn. Find the probability that one is blue and one is yellow.

**Probability**

A pair of fair dice is tossed once. Find the probability a sum of 5 or 3 appears.

**physics**

a 1250 kg car, rolling at 40km/h along a flat frictionless surface strikes a horizontal coiled spring and is brought to rest in a distance of 2.5m. Assuming there is no friction, what is the spring constant of the spring?

**Life orientation**

ask your life orientation teacher,for more info

**Chemistry**

When 7 mL of a solution containing 4 M KNO3 is diluted to 23 mL, a dilute solution is formed. What is the NO3- concentration in 15 mL of the dilute solution?

**pre-calc**

simplfy the expression by double angle formula or a half angle formula. cos^2(x/2)-sin^2(x/2) 2sin(x/2)cos(x/2)

**Per-calc Helppppp**

find: tanx=-3 one period and all angles 3csc^2x=4 one period and all angles sin2x+cosx-0 one period

**Per-calc Helppppp**

keep in mind answers should be pi radians or if necessary 3 dec. csc^2-2=0 all angles 4cos^2x-4cosx+1=0 all angles and name 8 angles 7sin^2x-22sinx+3=0 all angles and name 8 angles 2cos^2x-7cosx=-3 all angles sinx(2sinx+1)=0 all angles

**Pre-Calc Help!!!!!!!!**

cos(2tan^-1(15/8))

**Pre-Calc Help!!!!!!!!**

1+sin2x/sin2x=1+1/2(secx)(cscx)

**Pre-Calc Help!!!!!!!!**

Evaluate the expression under the given conditions. sin (A+B); tan A= 12/5, A in quadrant 3, sin B= -3sqrt(10)/10, B in quadrant 4.

**English**

I have an test on these and I do not want to fall the test. Please tell me a ways I can study, online tests etc so that I can pass it. Thank you and I appreciate for your help! They are: They will be fill in the blanks, multiply choices. (1)Petroleum (2) Solar Energy resources...

**DrBob222**

Thank you sooooooooo much!!!!!!

**Chem-Help Please!!!**

a correction needs to be made to the calculations for real gases as compared to ideal gases. apply these corrections and calculate the real pressure expected for 5 mole of nitrogen in a 1.5L container at a temp. of 20C. Note: I tried to find right formula for this but couldnt...

**statistics**

The ages (in years) of 10 infants and the number of hours each slept in a day Age, x: 0.1, 0.2, 0.4, 0.7, 0.6, 0.9, 0.1, 0.2, 0.4, 0.9 Hours slept, y: 14.9, 14.5, 13.9, 14.1, 13.9, 13.7, 14.3, 13.9, 14.0, 14.1 Find the equation of the regression line. Then use the regression ...

**HISTORY PLEASE HELP!**

I had put b on my test and it was incorrect. A friend out e and got it right. Not sure why though sorry.

**Pre-Calc Help!!!!!!!!**

Evaluate the expression under the given conditions. sin2(theta), sin(theta)=1/7(theta) in Q2

**Pre-Calc Help!!!**

Find sin x/2, cos x/2, and tan x/2 from the given information. cos x=− 4/5, 180° < x < 270° sin(x/2= cos(x/2)= tan(x/2)=

**Pre-Calc Help!!!**

Simplify the expression by using a Double-Angle Formula or a Half-Angle Formula. Sqrt(1-cos50/2)

**child day care**

It's A