# Posts by jessica

Total # Posts: 3,341

**Math**

Car 1 & Car 2 leave the same location . Car 1 leaves the location 10 minutes before Car 2 and is traveling 65 mph. Car 2 is traveling at 75 mph. How long before Car 2 catches Car 1?

**wrtiting**

Robert Created a pattern by starting with the numbre 5 using the rule múltiply by 2,then subtract 3 write the next 5 terms in the pattern

**heath**

(1)A (2)B (3)C

**PHYSICS**

FIND THE MASS OF A 200 n BABY ELEPHANT

**Trigonometry**

A plane leaves an airport and flies at 36 mph on a course of 103.25° for 1 hour and 33 minutes. Then it changes course to 236.75° and flies for 48 minutes. How far is it from the airport? If it wished to return, what would be its course?

**health**

3. D

**Algebra 1**

An experiment is underway to test effect of extreme temperature on a newly developed liquid two hours into the experiment the temperature of the liquid is measured to be-17 degrees Celsius after eight hours of the experiment the temperature of the liquid is -47 degrees Celsius...

**Chemistry**

If a basic solution has a pH of 11.88, is it considered to be a strong base? Is an acidic solution with a pH of 4.44 considered to be a strong acid?

**English**

I need some help with this question

**English**

Martin Luther King begins his letter with the following paragraph: While confined here in the Birmingham City Jail, I came across your recent statement calling our present activities "unwise and untimely." Seldom, if ever, do I pause to answer criticism of my work ...

**math**

3/6

**math**

a customer went to a garden shop and bought some potting soil for 17.50 and shrubs. if the total bill was $71.00, how much did each shurb cost if they all cost the same? write and solve an equation. show your work

**technoligy**

1:D 2:A 3:B 4:C anonymous is right

**Math**

The first term in a sequence is 4 and each of the following terms is found by multiplying the previous term by n. What is the fifteenth term? Is the answer 4n(15)?

**Algebra 1**

Eight times the sum of 11and a number is 123

**math**

Suppose you have $60 to buy shrimp and chicken wings for a party. Shrimp costs $10/lb and wings cost $6/lb. Write and graph a linear equation that could be used to determine the number of pounds of each food that can be purchased with $60 Would I start with the y = mx + b 60...

**Math**

A utility company has the following rate schedule for natural gas usage in a city's business district: Monthly service charge $8.80 per therm service charge: 1st 25 therms: $0.6686/therm over 25 therms: $0.85870/therm (a) what is the charge for using 25 therms in one month...

**Math**

A quality company verifies 2 shirts from the same box to insure the quality of the shirts that are being sent out. If each box contains 3 small, 4 medium, and 2 large shirts, what is the probability that they will pick the same size shirt for a box? I am unsure how this ...

**math**

Rachel deposited $6,004 in a savings account with simple interest. Three months later, she had earned $210.14 in interest. What was the interest rate?

**chemistry**

Write the net ionic equation for the following molecular equation. 3FeCl2(aq) + 2(NH4)3PO4(aq) Fe3(PO4)2(s) + 6NH4Cl(aq)

**AP Physics**

A ball is kicked 30º above the horizontal with an initial velocity of 20m/s. A fence 2.3 meters high is located 32 meters away. a. How long does it take to reach the fence? b. Does it goes over the fence? Does it hit the ground before? By how much? I believe I have to ...

**science**

Red car is A. Blue car is B. The Blue car is slower than the A. The Red car starts at a starting point 40m behind the Blue at what point do they meet?

**statics**

A store clerk filing an order for 17 models of a new smart-phone inadvertently pulled some older models and included them in the order. There are 25 new models and 12 older models in stock when the clerk filled the order. Determine the probability that the company receiving ...

**genetics**

Consider a population where gene A come in two form, A1 and A2. This gene is not under selection and random mating occurs with respect to that gene and p= 0.5 and q= 0.5. What are the expected genotype frequencies in the next generation? To do this, you should find the ...

**Chemistry: Equilibrium**

So, I think I'm doing everything right and even checking my math, but it keeps showing up as wrong. If someone can help me and go into detail,including the quadratic formula, I would appreciate it: Phosphorus pentachloride decomposes according to the chemical equation Pcl5...

**Louisiana History**

Is #3 B?

**Louisiana History**

Please help!!! 1. What set the steamboat apart from the flatboat and the keelboat? a) The steamboat was inexpensive to build. b) The steamboat could go back upriver with ease.*** c) The steamboat has a slow and easy ride. d) The steamboat could only transport people. 2. Why ...

**math**

Louann and Carla received equal scores on a test made up of multiple choice questions and an essay. Louann got 14 multiple choice questions correct and received 24 points for her essay. Carla got 16 multiple choice questions correct and received 14 points for her essay. How ...

**Physics**

A baseball is thrown at an angle of 29 degrees relative to the ground at a speed of 24.3 m/s. The ball is caught 51.0463 m from the thrower. The acceleration due to gravity is 9.81 m/s2 How high is the tallest spot in the ball's path? Answer in units of m

**Union City**

A segment of length 94 cm has rotated d degrees around center 0 what is the length? What is d and O

**Louisiana History**

C, A??

**Louisiana History**

D, B, A???

**Louisiana History**

1. Which was not a reason for the King of Spain to be cautious when siding with rebelling British colonists? A) The colonists were rebelling against a monarch B) Spain could acquire more land in the New World. C) The British colonists were not well-funded and not as powerful ...

**Physical Chemistry**

A saturated solution of Na2SO4, with excess of the solid, is present at equilibrium with its vapor in a closed vessel. (a) How many phases and components are present? (b) What is the number of degrees of freedom o the system? Identify the independent variables. Suppose that ...

**Art**

B) If, as Edmond indicated, Pont Neuf, Paris was painted during a single day, it was preceded by careful preparations, possibly including preliminary delineation of the permanent architectural features.

**Louisiana History**

Please Help!! 12. What was the main exploration goal of Robert Cavelier, Sieur de La Salle? A) to find gold and silver** B) to find an all-water route to China C) to establish a fur trade with the Indians D) to map the route of the Mississippi River

**Louisiana History**

Thank You!

**Louisiana History**

Please Help!! 10. Why was it necessary to move Fort Maurepas? A) Native Americans kept attacking the fort. B) The sandy soil the fort stood upon was useless for growing.** C) The king of France did not want the fort to be in a place that everyone could easily see. D) The ...

**Louisiana History**

Please Help!! 9. Why did Louisiana's proprietary governor, Cadillac, first have trouble with the Indians? A) He refused to smoke the calumet. B) He ordered raids on Indian settlements. C) He captured and made slaves of the Indians. D) He ordered the Indians off their ...

**Louisiana History**

Please Help!! 6. Which problem did Bienville address first when he returned to serve Louisiana's governor a second time? A) food shortage B) Indian relations C) lack of colonists D) money shortage

**Louisiana History**

Are the answers to 1. B, 2. A, C???

**Louisiana History**

Please check my answers 1.Which best describes the effect of European settlers on the culture of Native Americans in Louisiana? A) The Native Americans were left to prosper on their tribal homelands. B) The Native Americans turned increasingly from hunting and agriculture to ...

**Chemistry**

If you have light that has a frequency of 2.88 x 10 to -9 power Hz, what is the wavelength? I don't know how to do this and what formula to use.

**Radioactivity**

Iodine-131 is a radioactive isotope. After 8.00 days, 50.2% of the sample remains. What is the half life of 131-I?

**Science**

Does hot or cold water dissolve faster in with 20g of sugar

**Math**

The answer would be 57.1985401309. I'm not exactly sure how to explain it.

**Quick math help**

No, you are correct. Great job!

**Chemistry I - University**

Suppose 5.87 g of barium acetate is dissolved in 300. mL of a 71.0 m M aqueous solution of sodium chromate. calculate the final molarity of barium cation in the solution. You can assume the volume of the solution doesn't change when the barium acetate is dissolved in it...

**Chemistry I - University Level**

@ DrBob222 I know my ions are the same as my moles but I am having trouble understanding what I do next. Can you explain how you broke down this problem? What steps am I missing? Thank you!

**Chemistry I - University Level**

Suppose 5.87 g of barium acetate is dissolved in 300. mL of a 71.0 m M aqueous solution of sodium chromate. calculate the final molarity of barium cation in the solution. You can assume the volume of the solution doesn't change when the barium acetate is dissolved in it. ...

**math**

The price of a small cabin is $55,000. The bank requires a 5% down payment. The buyer is offered two mortgage options: 20-year fixed at 7.5% or 30-year fixed at 7.5%. Calculate the amount of interest paid for each option. How much does the buyer save in interest with the 20-...

**math**

The price of a small cabin is $35,000. The bank requires a 5% down payment. The buyer is offered two mortgage options: 20-year fixed at 7.5% or 30-year fixed at 7.5%. Calculate the amount of interest paid for each option. How much does the buyer save in interest with the 20-...

**Physics**

Suppose a rocket ship in deep space moves with constant acceleration equal to 9.80 m/s2, which gives the illusion of normal gravity during the flight. (a) If it starts from rest, how long will it take to acquire a speed 12% that of light, which travels at 3.0 × 108 m/s...

**Chemistry**

2H202-> 2H2O + O2 Suppose you carry out the decomposition using 25.0 mL of a 2.00M hydrogen peroxide solution and obtain the following: 8.62 mL of gas is collected in 120 seconds. How many moles of oxygen are produced per second?

**algebra**

c.750

**Math**

Gymnastic lessons cost $30 per week. How much will 18 weeks of gymnastic lessons cost?

**Economics (Net Present Value**

Hi Leo, Use formula, NPV=FV/(1+i)^n... - C. You almost had it right, but you multiplied instead of dividing. Little late than never.

**Chemistry**

That's the same issue i'm having. This is directly from my printed lab sheet.

**Chemistry**

Experiment questions: Experiment 1 results mass of beaker:116.944 g mass of dodecanoic:11.629 g hot water: 175 C warm water: 10 C Average Fressing pt of Dodecanoic = 42.7 Experiment 2 results: Unknown C solution mass: 2.091g Hot water: 175C warm water: 10C average FP of UK C ...

**physics**

What state of the art computer technology is used to train pilots when wanting to copy the experience of flying an aircraft?

**Math**

If m and n are integers, which of the following must be an even integer? A. 2mn B. mn C. mn+2 d. mn-2 e. 3mn

**English**

Thank you!

**English**

Is the sentence "Confiscation is legal." a simple sentence where "confiscation" is used as a noun?

**English**

How would I use the word "Salvation" as a noun in a simple sentence? My first sentence was He gave salvation, but he is the noun in that sentence. My second sentence was Salvation was given.

**Chemistry**

in the equation, n = cv, what is the meaning of n? I know that it stands for the number of moles, but I'm not exactly sure what that means. Our teacher wants us to mention Avogradro’s number in our explanation

**Calculus**

I am so appreciative of your help, but what happened to the b?

**Calculus**

I have the question :A small blood vessel of radius 2mm branches off at an angle(theta) from a larger blood vessel of radius 4mm. According to Poiseuille's Law the total resistance to the blood flow is proportional to T=(a-bcot(theta)/4^4)+(bcsc(theta)/2^4) Show that the ...

**Calculus**

My question is:Use L'Hospital's rule to find limit as x approaches 0 (e^x-e^-x-2x)/x-sinx. 1st I took the derivative to get (e^x-e^-x-2)/1+cosx. Substituting in 0, I got -1. The answer is supposed to be 2.I also tried (e^x-xe^-x-2)/1+cosx, and wound up with -(1/2). I ...

**Chemistry**

H2=-0.0037 I2=-0.0037 Hi=0.0276 (0.0276)^2/(0.0037)(0.0037)=56 2.00-x +2.00-x==> 2x Am I heading in the right direction?

**Chemistry**

Determine the concentration at equilibrium if you start with 4.65 grams of Hydrogen and 200 grams of Iodine in a 4.55 liter container. If you now add an extra 1.25M of I2 after equilibrium, calculate Qc. Recalculate now what the concentrations should be at equilibrium. H2(g...

**Math**

Suppose the stock of Microsoft increases in value by $5 per share. If all other Dow stock prices remain unchanged, how does this affect the DJIA? a) 37.80 points up b) 30.24 points up c) 22.68 points up

**Math**

Suppose the rate of inflation this year is 4.5%. What is the percentage decrease in the buying power of a dollar? a) 4.3% b) 4.7% c) None of the above.

**Math**

1. Suppose the buying power of the dollar decreases by 6.7% this year. What is the rate of inflation this year? a) 7.6% b) 7.2% c) None of the above.

**Chemistry**

The activation energy (E*) for a reaction is 195 KJ. If the k for this reaction is 3.46 x 10-5/min at 35oC, what will the temperature be in OF when k is 1.5 x 10-3/min?

**Chemistry**

You mix 45 ml of .20M HCl with 45 ml of .20M KOH in a calorimeter. The temperature of both reactions before mixing is 21.5oC. The temperature rises for the mixture to 22.7oC after mixing. What is the enthalpy change per mole of water produced?

**Chemistry**

(3.5x10^-3/5.3x10^-5)/(1/330)-1/285)=.0035

**Chemistry**

If the rate of the reaction is 3.5 x 10-3 at 330 K, and the rate of reaction at 285 K is 5.2 x 10-5 what is the activation energy Ea in KJ/mole?

**Chem**

450x2.010(110-100)=9045 8566.25+18828+9045+4183+89=40711.25 (40711.25)(114.2g/mol)= 4649334.74

**Chem**

2.010 Do I replace that with the 1.86

**Chem**

2.010

**Chem**

Steam : 450x1.86(110-100)=8370 8566.25+18828+8370+4183+89=40036.25kj (40036.25)(114.2g/mol)= 4572139

**Chem**

450x4.184(100)188280 450x4.184(110-100)= 18828 18828+4183=23011 23011g of gasoline

**Chem**

Cu specific heat: 0.385 H2o specific heat: 4.184 21+273.15=294.15 110+273.15=383.15 {I subtracted these and got} ______ 89 250x0.385(383.15-294.15)= 8566.25 450x4.184(383.15-294.15)= 167569.2 47(110-21)=4183 I'm lost on this problem

**Chem**

It's Jessica from my first screen name On this problem I wanted to know if I'm going with the correct formula q= CpxmassxTf-Ti 250 g being mass I just do t know how to set up the formula

**Chem**

When a piece of Copper weighing 250 grams is placed in a cup with 450 ml of water at 21OC and the Cp of the cup is 47 J/K, how many grams of gasoline would it take to heat the system to 110OC?

**Chemistry II**

CpxmassxTf-Ti (2.06)(275)(0-(-25))=14162.5 333J/100x14162.5 = 47161.125 47161.125+14162.5= 61323.625 61323.625(1gas/48,000)= answer: 1.277g of steam Thank you to the way for helping chemistry isn't my best subject so I apreciate the time y'all put in to help tutor

**Chemistry**

T1= 27+273.15=300.15K T2=90+273.15=363.15 K In(1/300.15)-(2/363.15)= 5.709???? Did I get it?

**Chem**

K=0.693/24 = .028875 In(.100/.33)/-.028875= 41.34 sec

**Chem**

-0.693/ In(.100/.33) = 17.23 seconds I know I did my math off but I'm not sure if I did it correct this time would it be 17.23 sec

**Chem**

0.693/In(.100/.33)= -.5804

**Chem**

If compound X has a first-order half-life of 24 seconds, how long would you have to wait for only 33% of the original material to be left? Explain why not knowing original Molarity of X does not effect this problem.

**francais (french)**

I just need to know if im right or not, and the right answers.. about the accents i know them i just cant type them here.

**francais (french)**

And about the "pour" and "de" this is how the sentence was given by my teacher.. so i cant change them i don't think..

**francais (french)**

My answers 1. desquelles 2. auquel 3. desquels 4. auxquelles 5. a laquelle

**francais (french)**

Remplissez les tirets avec la bonne forme de "lequel" If my answers are correct 1. Margo revait de sa soeur pour___ il avait de l'admiration 2. Voila une solution_____ je n'ai jamais pense(a) 3. Tout le monde admirait celle fille ______ on citait des poemes ...

**media**

Can the source language of the film have an impact on its diffusion and its distribution?

**Calculus**

My question is finding the derivitive of y=((x+λ)^4)/(x^4+λ^4). I distributed the exponent in the numerator, but I don't know if that's right. Rewritten as y=(x^4+λ^4)/(x^4+λ^4). I found the derivitive and multiplied accordingly, as ((4x^3+4λ^3...

**Calculus**

So, I have a homework question on The Quotient Rule (taking derivitives) and I would like to know if I did it right. Calculate: y=(1/sqrt(x))-(1/(5th root of x^3). My 1st step was to change the sqrt to x^1/2, and the 5th root to x^1/5+^3. So then I got y=(1/x^1/2)-(1/x^16/5). ...

**College Algebra**

Marcus bought y movie posters for $3 each. Write an algebraic expression for total amount Marcus spent

**Language**

Click on the line with an error. We have already eaten lunch. Just between you and I, what did you think about the food? No error