# Posts by jason

Total # Posts: 1,335

**Math**

Luke bought some thing at the store. He paid $5.98 for a pizza, $3.75 for a case of soda $2.50 for a box of brownie mix and $1.01 in sales tax. What information is needed to find Lukes correct change?

**Math**

C. 4/32

**Math**

Which fraction also belongs in set a? set - 3/24, 5/40, 9/72, 6/48 a. 4/24 b. 2/8 c.4/32 d. 8/40

**Math**

Jairo ears $256 for 50 hours of work. Write an equation(proportion) to find x his wages for 76 hours of work

**Chemistry**

is this right Consider the following reaction at equilibrium N2(g) + O2(g) + heat < = > 2NO(g) Indicate how each of the following will shift the equilibrium a. raising the temperature of the reaction. b. decreasing the volume of the reaction container. c. adding a ...

**English 101**

What does uncanny and marvelous mean?

**English 101**

What does uncanny and marvelous mean?

**Chem**

Calculate the percent yield of eugenol obtained considering the fact that clove oil is approximately 16-19 % clove by weight of cloves. isolated eugenol=061g purity of eugenol in clove oil=99.6% (based on clove oil gas chromatograph) Estimate the % yeild for eugenol.

**physics help**

wo thin rectangular sheets (0.13 m 0.52 m) are identical. In the first sheet the axis of rotation lies along the 0.13 m side, and in the second it lies along the 0.52 m side. The same torque is applied to each sheet. The first sheet, starting from rest, reaches its final ...

**chemistry**

why sugar dissolve in cooking oil

**Chemistry**

By titration it is found that 68.9 mL of 0.122 M NaOH(aq) is needed to neutralize 25.0 mL of HCl(aq). Calculate the concentration of the HCl solution.

**Chemistry**

The flask shown contains 10.0 mL of HCl and a few drops of phenolphthaein indicator. The buret contains 0.270 M NaOH. What volume of NaOH is needed to reach the end point of the titration? What was the initial concentration of HCl?

**Chemistry**

Hydrogen peroxide can be prepared by the reaction of barium peroxide with sulfuric acid according to BaO2(s)+ H2SO4(aq)---> BaSO4(s)+ H2O2(aq) How many milliliters of 3.00 M H2SO4(aq) are needed to react completly with 85.1g of BaO2(s)?

**Chemistry**

3.13g if CuNO3 is dissolved in water to make a 0.270 M solution. What is the volume of the solution?

**Chemistry**

Calculate the number of moles of solute in 18.33 mL of 0.1115 M K2Cr2O7(aq)

**chemistry**

How many grams of solute are present in 205 mL of .340 M KBr?

**Algebra**

Determine if the equation y = 2^x represents exponential growth or decay I thought at first it was growth but now I think it might be decay because there is no "b" in a parentheses so do I assume b is less than 1 so it's decay? Please help

**phyiscs**

A uniform plank of length 4.5 m and weight 233 N rests horizontally on two supports, with 1.1 m of the plank hanging over the right support (see the drawing). To what distance x can a person who weighs 454 N walk on the overhanging part of the plank before it just begins to tip?

**chemistry**

CO (g) + Cl2 (g) ↔ COCl2 (g In one experiment, 0.93 bar of CO was combined with 1.01 bars of Cl¬2 in a reaction vessel at 700K. After the system reached equilibrium, the total pressure was 1.24 bars. Calculate Kp0 for the system.

**physics help**

A 1.0 kg object is suspended from a vertical spring whose spring constant is 130 N/m. (a) Find the amount by which the spring is stretched from its unstrained length.

**science**

Are all materials in 3d why or why not?

**materials**

are all materials in 3d?

**physics help**

A 8.6 kg board is wedged into a corner and held by a spring at a 50.0° angle, as the drawing shows. The spring has a spring constant of 186 N/m and is parallel to the floor. Find the amount by which the spring is stretched from its unstrained length.

**math**

63%

**Chem**

Can you please tell me if these are right? Classify the solutes in the following equations as a weak electrolyte, a strong electrolyte of a non electrolyte in water. a. XY2(s)=X2+(aq) +2Y-(aq) b. HX(g) ß=H+(aq) + X-(aq) c. XYZ(s)=XYZ(aq) d. YOH(s)=Y+(aq) + OH-(aq) a. ...

**integrals!!**

Compute the value of the integral using geometry. integral from -4 to 1 of (2x +8)dx

**calculus**

Referring to the Mean Value Theorem and Rolle's Theorem, how can I tell if f is continuous on the interval [a,b] and differentiable on (a,b).

**Chem**

Plese tell me if these are right. A 15.0-mL sample of NaCl solution has a mass of 15.78g. After the NaCl is evaporated to dryness, the dry salt residue has a mass of 3.26g. Calculate the following concentrations for the NaCl solution. a. %(m/m)= 3.26 x 100 / 15.78 = 20.7 b. %(...

**CHEM**

Will you please tell me if these are right? Write the symbol of the caton or anion that give(s) the following reaction:? 1. Forms a precipite with AgNO3 that does not dissolve in HNO3 2. Forms a gas with HCl 3. Give a bright, yellow-orange flame test 4. Forms a precipitate ...

**english**

Imagine you are on a local commission appointed to study the lack of proper recreation facilities for youth in your neighborhood. Decide what facilities should be recommended. Write an appropriate resolution to be presented to your county government. Remember to give the ...

**Physics**

Initially sliding with a speed of 2.3 m/s , a 1.8 kg block collides with a spring and compresses it 0.36 m before coming to rest. WHat is the force constant of the spring?

**physics please help**

A 5.00 kg ball (ball 1), moving to the right at a velocity of +4.00 m/s on a frictionless table, collides head-on with a stationary 7.60 kg ball (ball 2). Find the final velocities of the balls if the collision is as specified below. (a) elastic collision ball 1 ball 2 (b) ...

**help me physics**

suppose the cart has mass m = 203 g, and it strikes the clay at speed vo = 5.24 m/s and comes to a dead stop. Assume the track is frictionless, and the clay is crushed inward by 1.83 cm. a)Find the magnitude of the impulse exerted by the clay on the cart. 1 N-m i got this ...

**physics**

A 4111.0 kg truck is parked on a 14.6° slope. What is the friction force on the truck?

**physics**

A woman has a mass of 42.9 kg. What is her weight on earth? and what is her weight on the moon, where g=1.17 m/s2

**Calculus**

When air expands adiabatically (without gaining or losing heat), its pressure and volume are related by the equation where is a constant. Suppose that at a certain instant the volume is cubic centimeters and the pressure is kPa and is decreasing at a rate of kPa/minute. At ...

**Calculus**

When air expands adiabatically (without gaining or losing heat), its pressure P and volume V are related by the equation PV1.4=C where C is a constant. Suppose that at a certain instant the volume is 470 cubic centimeters and the pressure is 89 kPa and is decreasing at a rate ...

**Physical Science**

an airplane is flying at 600km/h at an altitude of 2.0km. When the sound of the airplane's engines seems to someone on the ground to be coming from directly overhead, how far away is she from being directly below the airplane?

**Chem**

Would you please tell me if these are right? A sample of helium has a volume of 325 ml and a pressure of 655 mm hg. What will be the pressure if the helium is compressed to 125 ml (t and n are constant) I got 1703 mm of Hg A 75.0 ml sample of oxygen has a pressure of 1.50 atm...

**Chem**

Please tell me if these are right. How many grams are needed to obtain 1.5 moles of magnesium oxide? I got 60grams is this right? Write a balanced equation for the reaction of the magnesium and the oxygen including their physical states. I got 2Mg=Mg2+O2? Thank You!

**english**

In the answer area below, write the conjunction in the following sentence. Sentence: Give it to the boy or his mother. This doesn't seem like it should be difficult, but I want to make sure I understand. Is 'or' the conjunction?

**Chemistry**

Can you tell me if these are right please? When 2.50g of copper reacts with oxygen the copper oxide product has a mass of 2.81g. What is the simplest formula of the copper oxide. I got Cu2O (copper (I) oxide). Aluminum and oxygen gas react to produce aluminum oxide. A.) write ...

**english**

In the answer area below, write the 2 adverbs in this sentence and explain how each adverb is used. Example: Eventually, she walked proudly. Answer: eventually - eventually tells when she walked ; proudly - proudly tells how she walked Sentence: She walked very slowly into the...

**english**

List the nouns in the following sentence. Next to each noun - label whether it is concrete or abstract by writing a "C" or an "A." Sentence: In the midst of the excitement, Samuel lost his pencil on the bus. This is what I believe to be correct: excitement-...

**Physics #2**

A car can decelerate at -3.40 m/s2 without skidding when coming to rest on a level road. What would be the magnitude of its deceleration if the road were inclined at 14° uphill? Assume the same static friction coefficient.

**Physics**

Suppose that you are standing on a train accelerating at 0.33g. What minimum coefficient of static friction must exist between your feet and the floor if you are not to slide?

**Physics**

Suppose that you are standing on a train accelerating at 0.33g. What minimum coefficient of static friction must exist between your feet and the floor if you are not to slide?

**algebra**

Two planes are 1,400 miles apart. They fly towards each other, one at 125 mph and the other at 175 mph. How long does it take the planes to pass each other (round to the nearest hundredth)?

**physics**

A cheetah is hunting. Its prey runs for 3.21 s at a constant velocity of +8.36 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?

**physicS**

so thatd be H=dSin17.2 40.45m=dsin17.2 d=40.45/sin17.2 d=136.8 it all looks right, but for some reason incorrect, if anyone has a chance, can you check my math for me? i cant understand where i went wrong

**physicS**

A skier is gliding along at 6.93 m/s on horizontal, frictionless snow. He suddenly starts down a 17.2° incline. His speed at the bottom is 29.7 m/s. What is the length of the incline? i understand that the equation used is gH= change in (v^2)/2 so i plug in 9.8H=(29.7^2-6....

**college statistics**

In Chapter 5, Exercise 9, we studied the variability of crime rates and police expenditures in the eastern and Midwestern United States. We’ve now been asked to investigate the hypothesis that the number of crimes is related to police expenditures per capita because ...

**Projectile Motion Physics**

An Arrow directed at a stationary target is shot at an angle of E25N. The arrow hits the intended target at the same height from which it is launched, 3.0s later. Determine the distance from the archer to the target.

**1st grade**

fine the rule

**math**

find the decimal notation for 63/3/8

**physics**

An athlete executing a long jumper leaves the ground at a 27.0 degree angle and travels 7.89 m. What was the takeoff speed? If this speed were increased by just 5.0%, how much longer would the jump be? I came up with a take off speed of 27.4 but the system is saying that is ...

**math**

nvm you don't have to answer this. i was told the wrong problem.

**math**

my friend asked me how to do this probelm and i could not figure it out for the live of me. its simple im pretty sure. (6-5i)/(6+5i) I tried using the conjugate method and my answer did not come out correct. can you please answer this?

**Chemistry**

A 0.25g sample of a pretzel is burned. The heat it gives of is used to heat 50.g of water from 18 to 42 degrees C. what is the caloric value of the pretzel in kcal/g? Can someone walk me through step by step?

**Chemistry**

175g of water was heated fro 15 to 88 degrees C. how many kilocalories were absorbed by the water? I got 94.5 kcal. Is this right?

**Chemistry. can jus anyone giv me ther opinion.**

k thank u

**Chemistry. can jus anyone giv me ther opinion.**

idk this is the question to a quiz im taking i askd my teacher and he didn't even kno what to say i think its D and i jus need to get this question rite and ill pass but if i miss it then i fail. i jus want as much help as i can get.

**Chemistry. can jus anyone giv me ther opinion.**

Eva has two containers labeled A and B. The diameter of container A is 8 inches and the diameter of container B is 12 inches. If Eva pours the water from container A into container B, which will occur...

**English**

its talking about not quite understanding maturity in which a young person grows up to become an adult. for some its like watking through a doorway and for others it seems they can't even get the door open.

**Chemistry...HELP!!!!**

In a reaction in which A + B yields AB, the reaction is referred to as a _________. A. decomposition reaction B. double-replacement reaction C. combustion reaction D. composition reaction i think is a

**Chemistry**

In a reaction in which A + B yields AB, the reaction is referred to as a _________. A. decomposition reaction B. double-replacement reaction C. combustion reaction D. composition reaction

**Economics**

Why has China begun an economic shift towards a free enterprise system?

**High school economics**

thanks!

**High school economics**

Where might you take someone from China or Cuba to show them the differences between the economy in the US and their country?

**Chemistry, Solutions**

Two or more combined substances that do not react form a _________. solution mixture substance compound

**Chemistry**

What types of elements are involved in metallic bonding? A. noble gases B. metals and non-metals C. non-metals only D. metals only

**Chemistry**

Acids and bases react with one another to form compounds called ______? A. salts B. ions C. mixtures D. salts, ions, and mixtures

**Math - polynomial function**

Write a polynomial function with integral coefficients having the given roots. 1.) 0, -1/2, 6 2.) +or- 5i

**College Algebra**

suppose that the area of a square is six times its perimeter. find the length of a side of the square

**Science**

What is the specific heat of an unknown substance if 2000 J of energy are required to raise the temperature of 4 grams of the substance 5 degrees Celsius?

**chemistry**

how to balance ZnO+2HCl yields ZnCl2+H2O

**math**

Hoshi walk 10 meters in 3 sec. a. what is her walking rate? b. at this rate how long does it take to walk 100 meters c. suppose she walks the same rate for 50 sec. how far does she walk d. wright an equation that represents the distance D that Hoshi walks in 1 sec

**math**

easy

**The Question that was not answered. (twice)**

What are the four basic levels of ecological study, and what is the focus of inquiry at each of these levels? I don't know what it's asking to start with and can't find anything relevant online, in my textbook or in my study guide! Since it says levels, I think it ...

**bio**

What are the four basic levels of ecological study, and what is the focus of inquiry at each of these levels? I don't know what it's asking to start with and can't find anything relevant online, in my textbook or in my study guide! Since it says levels, I think it ...

**Chemistry**

sources of error can include human errors made by you during the experimentation or your surroundings which may have affected your outcome.

**AP Biology**

What are the four basic levels of ecological study, and what is the focus of inquiry at each of these levels? I don't know what it's asking to start with and can't find anything relevant online, in my textbook or in my study guide! Since it says levels, I think it ...

**Math**

haha sorry. i didn't bother to read the entire thing. you must divide first in order to root both sides

**Math**

Please excuse my dear aunt sally

**Math**

Show that the transformation T:R^2->R^2 given T(x1,x2)=(3x1-5x2,x1+2x2) is linear by verifying that satisfies the definition of linear.

**Linear Alebra**

Show that the transformation T:R^2->R^2 given T(x1,x2)=(3x1-5x2,x1+2x2) is linear by verifying that satisfies the definition of linear.

**Algebra**

For what real number k does 3x^2 k factor as 3(x 2)(x + 2)? Can someone please help with this question? I can not understand how it says to solve this in the book

**British Literature**

what is number 4?

**MATH HELP**

any points: I can use (2,6) or (10,70)?

**MATH HELP**

1. Consider the following. f(x)=8x-10 g(x)=x^2-4x+10 (a) Find the points of intersection of the graphs. ANSWER:(2,6) are the smaller values and (10,70) are the larder values (b) Compute the area of the region below the graph of f and above the graph or g. How do I answer part b?

**programming**

I am in a beginners class in computer programming and we have been designing our programs in pseudocode format and this is a homework question I have to solve this is how the question is written on my paper...can you please help, Thanks. Homework question: A car's miles-...

**programming**

I am in a beginners class in computer programming and we have been designing our programs in pseudocode format and this is a homework question I have to solve this is how the question is written on my paper...can you please help, Thanks. Homework question: A car's miles-...

**programming**

I am in a beginners class in computer programming and we have been designing our programs in pseudocode format and this is a homework question I have to solve this is how the question is written on my paper...can you please help, Thanks. Homework question: A car's miles-...

**chem**

A sample of gas confined in a cylinder with a movable piston is kept at constant pressure. The volume of the gas doubles when the temperature of the gas is changed from

**MATH**

Evaluate the indefinite integral. (Use theta for ƒÆ.) ç(8ƒÆ + cos(7ƒÆ))dƒÆ Ans: blank + C C is constant. How do I evaluate it?

**Math**

Find the general antiderivative of f (x) and check your answer by differentiating. f(x) = x^5 + 9 Need Help.

**Math**

Use the following table of values to estimate the area under the graph of f(x) over [0, 1] by computing the average of R5 and L5. Table: x: 0 0.2 0.4 0.6 0.8 1 f(x): 51 48 46 43 41 38 I need help with this problem.

**alg**

The answer would be D. 1. (2/x-1)-3/4= (5/x-1) -(2/x-1) -(2/x-1) 2. -3/4=(3/x-1) 3. (x-1)-3/4= 3 (distribute and you'll get #4.) 4. -3/4x+3/4=3 5.-3/4x= 3-3/4 6. -3/4x= 2.25 7. 2.25/(-3/4) x= -3

**physics**

a ring rotates ar 30rad/s and has a radius of 3m and a mass 0f 100kg. If a disk(mass=40kg and with a radius of 4m) is dropped on the ring so the centers are aligned, what will be the resulting rotational speed of the ring-disc combination?

**Statistics**

87.65