# Posts by Molly

Total # Posts: 595

**Trigonometry **

The light on the Prince Shoal lighthouse is 25m above water level. From a position behind the light, the angle of the depression of the sailboat is 12 degrees. How far is the sailboat from the lighthouse, to the nearest metre? (I have no idea how the diagram would look - it ...

**Pre Algebra**

A baker can prepare 2 1/2 dozen cupcakes in 1/4 hour. what is the unit rate?

**chemistry**

*The density of methanol is 0.79 g/mL

**chemistry**

Hello, I was confused on this chemistry problem and I was wondering if someone could please help me. 1) Consider the following chemical reaction: 2CH3OH(I) + 3O2 (g) ? 2CO2(g) + 4H2O(I) Calculate the number of moles of CO2 produced when 11.25 mL of methanol CH3OH(I) reacted ...

**Social studies**

I got 100 thxs

**physics**

rfiouh rig that is not right

**american government**

How does supporting the human rights defenders align with the philosophies of America’s Founding Fathers

**Math**

Thanks (: I knew it had t/20 in the solution somehow. I see what I did wrong now.

**Math**

I keep getting an negative answer. I know the answer is 4.5 only because the teacher tells us what it I just cannot figure out how to set it up. I got e^t/20 +1/20Ae^t/20 = 5e^t/20, which is way wrong

**Math**

A 100 gallon tank is filled with a salt solution containing 10 lbs of salt. Pure water is pumped in at a rate of 5 gallons per minute and pumped out at the same rate. How many minutes will it take the amount of salt to drop to 8 lbs? Round to one decimal place.

**medical coding**

ICD diagnosis code for traumatic left second fracture of metatarsal

**Calc**

Find the Value(s) of C guaranteed by the Mean Value Theorem for Integrals for f(x) =x^3 in the interval [0,3]

**Calc**

Describe the x-values at which f is differentiable. f(x)= x^2/5

**Calculus**

Why are these false? If a function has derivatives from both the right and left at a point then its differentiable at that point.

**Physics**

you pull your 6kg dog on a sled which has a mass of 15kg. while you are pulling at 33N, there is a 12N frictional force that is encountered. what is the acceleration of your sled and dog?

**history**

Anonomious is right!!! 100%!!

**Algebra**

Suppose U={...-3,-2,-1,0,1,2,3...} is the universal set and R={...-3,-1,1,3...}. What is R? A. {-2,0,2} B. {...-4,-2,0,2,4...} C. {...-4,-2,2,4...} D. {-4,-2,2,4} I think it is C. Thank you!

**Finite**

Assume that the test has 5 true/false questions, and 10 multiple choice questions (4 options per questions), each with exactly one correct answer. If a student guesses randomly on each question, what is his expected score? .5*5+10*.25 5/15?

**math**

Small marbles weigh 3.6 grams each and large marbles weigh 4.6 grams each. A bag contains 40 marbles and weighs 156 grams. How many marbles of each size are in the bag ?

**Math**

Two cars are 400 miles apart and start towards one another, one car traveling 4 miles per hour slower than the other. After 3 hours, the cars are 40 miles apart. Find the speed of each car

**Chemistry**

I have a question about solubility rules and net ionic equations so for example : CuSO4+Ba(NO3)2----->BaSO4+Cu(NO3)2 Okay so I know BaSO4 is insoluble while Cu(NO3)is solulable, that means BaSO4 will have a precipitate while Cu(NO3) doesn't. So does that mean the ...

**Chemistry**

thank you so much that makes so much sense :)

**Chemistry**

can you please please help me with these questions I don't know how to do any of them. I know how to calculate moles and grams and mole ratio,etc but I don't understand the limiting excess reactant and yield stuff. Thanks! 1.In the following chemical reaction, how many...

**Chemistry**

can you please please help me with these questions I don't know how to do any of them. I know how to calculate moles and grams and mole ratio,etc but I don't understand the limiting excess reactant and yield stuff. Thanks! 1.In the following chemical reaction, how many...

**MATH**

Hi, sorry to bother you. but can you please help me with this problem z=log(e^(5y)) Thanks!

**Social Studies**

Well Martha some people could be pretending to be ms.sue . but you are right Katie pickle is really. Big help she had help me and I pass a lots of test quiz and quick due to her support. Thanks Katie pickle you are really a big help

**Physics**

A Sunway train starts from rest at a station and accelerates at a rate of 2.0 ms^-2 for 10 s. It runs for constant speed for 50 s and slows down at a rate of 3.5 ms^-2 until it stops at the next station. Find the total distance covered Draw the velocity vs time graph for the ...

**Social studies**

7. A and c 8. C These are a 100% correct

**math**

Alex deposits $250 at the end of each month into an account that earns 4% interest compounded monthly. Determine the value of Alex’s account after 10 years. State you answer to the nearest $1

**Calculus**

A spherical balloon is inflated at the rate of 5 cubic feet/minute. What is the volume of the balloon if when the radius is increasing at the rate of 3 feet/minute?

**Science**

If 10g of magnesium reacted with 5g of oxygen how much magnesium oxide would you produce? How do you know?

**Math**

Tracy has one can of iced tea mix. One scoop of the mix makes two servings of iced tea. The scoop holds 1/12 of a can. How many servings of iced tea can Tracy make?

**Chemistry**

how many liters of CO2 and water vapor are produced by burning .3 liters of C2H2 (Acetylene) with .75 liters of O2? The balanced equation is: 2C2H2 + 5O2 = 2 H2O + 4CO2

**Language**

euphony:cacophony::

**Math**

The two shortest sides of a right triangle are 10 in and 24 in long. What is the legnth if the shortest side of a similar triangle whose two longest sides are 36 in and 39 in?

**Math**

If a punch recipe contains 40% of ginger-ale 25% of Orange Juice 20% of pineapple juice does 15% of sorbet how many cups of sugar are used in 8 cups of punch

**5th grade math**

jimmy measured 3 feet 7 inches tall in May. In October,he measured 4 feet 3 inched tall. How much did Jimmy grow from May to October?

**calc**

The quantity (in yards) of a certain fabric that is sold by a manufacturer at a price of p dollars per yard is Q = f(p). 1) What is the meaning of the derivative f ' (16)? 2) What are its units? 3) Is f ' (16) positive or negative? Explain.

**calculus**

A flea moves along the line y = -3 according to the equation: x = t^3 - 9t^2 + 24t where x is its x coordinate at time t secs. Determine: 1) the position, velocity, and acceleration of the flea at time 3 secs. Answer: position - 3^3 - 9(3)^2 + 24(3) = 18 units/second velocity...

**English**

The feeling that things weren't as good as they seemed is described best by which image in Borders

**Science**

Explain why chlorine (Cl²) is a gas at room temperature, but at sodium chloride (NaCL) is a solid at room temperature.

**Math**

OK - I get it now! Thank you so much!

**Math**

So, can I ask one more thing? Why do you factor first? Is it so that you have to factor to switch the order of the variables? Why can I not just do this? (other than because I will get the wrong answer!) :) c-d/d-c -d+c/d-c Is c-d not the same as -d+c? The reason I ask is ...

**Math**

Thank you!

**Math**

c-d / d-c I know the answer is -1, but what is the math that I have to show to get to that answer? Thanks!

**Algebra**

Mac N is right!! Thanks you!

**Math**

If I had three times as many marbles as my friend and toghter we had 48 marbles how many marbles do I have? 48/3=16?

**physics**

Two racing boats set out from the same dock and speed away at the same constant speed of 119 km/h for half an hour (0.500 h), the blue boat headed 26.8° south of west, and the green boat headed 41.4° south of west. During this half-hour (a) how much farther west does ...

**Social Studies**

?????????????????????

**Social Studies**

100%**

**Social Studies**

Ohhh, thank you so much! I got %100

**Social Studies**

So would it be microcredits? Aren't those like loans, meaning they would have to pay them back?

**Social Studies**

because they can trade the natural resources

**Social Studies**

I read over it and I think its C now

**Social Studies**

Which of the following is most likely to help countries in West and Central Africa solve their economic problems? A. griots B. microcredit C. imports of natural resources D. negative balance of trade I think the answer is D.

**math**

3x9

**science**

A bus makes a trip according to the position–time graph shown in the illustration. What is the average acceleration (in km/h2) of the bus for the entire 3.5-h period shown in the graph?

**Math**

If a graph of a quadratic function can have 0, 1 or 2 x-intercepts. How can you predict the number of x-intercepts without drawing the graph or (completely) solving the related equation? Suppose that the graph of f(x) = ax^2+bx+c has x-intercepts (m,0) and (n,0). What are the ...

**Math Algebra 1111**

If a graph of a quadratic function can have 0, 1 or 2 x-intercepts. How can you predict the number of x-intercepts without drawing the graph or (completely) solving the related equation? Suppose that the graph of f(x) = ax^2+bx+c has x-intercepts (m,0) and (n,0). What are the ...

**Chemistry**

Calcium hydroxide has Ksp = 5.5 x 10-5 at 25 oC and a molar mass of 74.10 g/mol. How many grams of calcium hydroxide are needed to create 365 mL of a saturated solution of calcium hydroxide at 25 oC?

**Chemistry**

The radioactive nuclide 18F decays by first order kinetics with a half life of 1.83 hr. How many hours will it take for 68.5% of a give quantity of 18F to decay?

**Chemistry**

20.0 mL of a 0.18 M HCl solution are combined with 50.0 mL of a 0.085 M NaOH solution. What is the pH of the resulting solution?

**math**

ok

**math**

Suppose there are 2 pieces of the cake left over,but you don't know how many pieces were in the whole cake. Explain how you could find the number of pieces in the whole cake if Taylor told you 1/6 of the cake was left. You may show your work in a drawing.

**MATH**

Lol Ms. Sue beat me to the answer :P

**MATH**

984,356 plus 1

**Science**

Would 2 be wet and 4 be warm?

**Science**

1. Air masses that form over land would be mostly A. Warm B. Cold C. Dry* D. Wet 2. Air masses that form over oceans or seas would be mostly A. Warm* B. Cold C. Dry D. Wet 3. Air masses that form over northern locations would be mostly A. Warm B. Cold* C. Dry D. Wet 4. Air ...

**Math**

Chad buys peanuts in 2-pound bags. He repackages them into bags that hold 5/6 pounds of peanuts.how many 2 pound bags should Chad buy so that he he can fill the 5/6 pound bags without any leftovers Common multiple of 5,6 is 30 how 6 goes into 30 5 times equals 5?

**Chemistry**

what is the PH of a solution of .1 M NAN3 that disassociates into HN3

**Chemistry**

What volume (mL) of 0.20 M HCl needs to be added to 1.23 L of 0.10 M acetic acid to reduce the percent ionization to 1.00%? Assume the volume of HCl added is negligible compared to the volume of the whole solution, and that the small x approximation is valid.

**college physics**

A fisherman poles a boat as he searches for his next catch. He pushes parallel to the length of the light pole, exerting a force of 245 on the bottom of a shallow lake. The pole lies in the vertical plane containing the boat's keel. At one moment, the pole makes an angle ...

**Chem-mystery**

sorry that's .2 M caoh2

**Chem-mystery**

Determine the PH of a solution that results from mixing 50 ml of .200 M hydroazoic acid, HN3 with 50 ml of CA(OH)2

**Chemistry**

What concentration of of CN- is needed to produce the same POH as 3.5*10^-5M solution of BA(OH)2?

**Chemistry**

What volume (mL) of .20 M HCL needs to be added to 1.23 L of .10 M acetic acid to reduce percent ionization to 1.00%?

**Chemistry**

I got 2*10^-5 for the Kb, is that right?

**Chemistry**

What concentration of of CN- is needed to produce the same POH as 3.5*10^-5M solution of BA(OH)2?

**History**

What does Truman mean when he claims, "Should we fail to aid Greece and Turkey in this fatal hour, the effect will be far reaching to the West, as well as t the East"?

**Algebra 1**

suppose you can work a total of no more than 20 hours per week at your two jobs. Babysitting pays $5 per hour, and your cashier job pays $6 per hour. youneed to earn at least $90per week to cover your expenses. Write a system of inequalities that show s the various numbers of ...

**History**

Between 1850 and 1860 several events occurred in the U.S. that highlighted the struggle over slavery. Describe these events and state what finally led to secession of the South beginning in December of 1860.

**Not possible?**

What are the questions?

**math**

The GCF of 8 and 24 is 8. The LCM of 8 and 24 is 24. I'm not sure what you're asking for the third part, what is the other sum? :)

**Help Please**

Is a(bc)=(ab)(ac)

**physics**

An 11.8 g bullet leaves the muzzle of a rifle with a speed of 578.5 m/s. What constant force is exerted on the bullet while it is traveling down the 0.6 m length of the barrel of the rifle? Answer in units of N

**Help please**

is a(bc)=(ab)(ac)

**Elementary manth**

Jose said that the square root -X=3 has no solutino since the square root is a negative, is this true. I think it does has a solution

**Math**

Is this the same a(bc)=(ab)(ac)

**math**

A plank of wood 6m long is cut in the ratio 1:5. Find the lenght in centimetres of the longer piece

**Maths**

What you need is a common denominator, so the two bottom numbers are the same. So you want both bottom numbers, in this case, to be 8. So you times the 4 by 2, remembering that whatever you do to the bottom you do to the top, so you times the one by 2 as well giving you 2/8. 2...

**P.E. HEALTH**

Thank you

**P.E. HEALTH**

Because it goes through many diffrent places and is processed in the small intestine. Right or No?

**P.E. HEALTH**

True or False: The main process for digestion takes place in the stomach. Is the answer False?

**Trigonometry**

Triangle PQR has vertices P(0, 1), Q(0, -4), and R(2, 5). Find the coordinates of R' to the nearest hundredth after rotating triangle PQR counterclockwise about the origin 45º.

**Trigonometry**

Triangle PQR has vertices P(0, 1), Q(0, -4), and R(2, 5). Find the coordinates of R' to the nearest hundredth after rotating triangle PQR counterclockwise about the origin 45º.

**Math**

Let sin A = 12/13 with 90º≤A≤180º and tan B = -4/3 with 270º≤B≤360º. Find tan (A + B).

**Math**

Suppose sinA = 12/13 with 90º≤A≤180º. Suppose also that sinB = -7/25 with -90º≤B≤0º. Find cos(A - B).

**American Government**

I need help with the following question I am not sure if the answer is B or C. General Revenue Sharing offers states and localities even greater flexibility than block grants because they? A.are given a blank check. B.are completely unaccountable to the federal government. C....

**Trigonometry**

Evaluate the inverse trigonometric function. Give your answer to the nearest degree. (Enter only the number.) cos^-1 (-1)

**Trigonometry**

Solve sin θ = 0.95 for -90º ≤ θ ≤ 90º.