# Posts by DIANA

Total # Posts: 909

**Math - Ratio's**

There are a total of 700 blue, yellow, and red balls in a machine. The ratio of blue balls to the total number of balls is 2:7. The ratio of yellow balls to blue balls is 7:4. The ratio of blue balls to red is 4:3. With the given information calculate the number of blue balls...

**Physics**

A cubic block initially at rest slides with a constant acceleration on an inclined plane 10m long in 2s. Calculate the acceleration of the block.

**Chemistry **

Give the oxidation state for the metal ion in each of the following compounds, respectively: K2O,CaO,TiO2,V2O5

**maths**

2.0308

**math**

Leah has two same size rectangles divided into the same number of Equal parts. One rectangle has 1/3 of the parts shaded and the other has 2/5 of the parts shaded. What is the least number of parts into which both rectangles can be divide?

**frenche **

I need help on verb and how to right the sentence in the way that it is sapousto be spelled pls help me

**Science Fair**

For my gr.8 science fair project, I have to come up with a catchy title. My science fair project is on how sugar affects your everyday activities and if it can have a benefit to your productivity. Anyone have an idea for a good title?

**Algebra 1b**

Task 1—Shipping a gift. You have selected a special gift for a cousin or other family member of similar age. You’re not close enough to deliver it by hand, so you will need to ship it to him or her. What did you choose for a gift? What size box will you need to ship ...

**Math**

Find the value of n (n is an integer). (n+7)! / n!(n+6)(n+4) = 9!/3

**Chemistry**

Two substances, gold and granite, initially at different temperatures, come into contact and reach thermal equilibrium. The mass of gold is 20.2 g and its initial temperature is 58.2 ∘C. The mass of granite is 29.1 g and its initial temperature is 20.1 ∘C. What is ...

**Applications of functions**

you have 20 gallons of gas in your car and you burn one gallon every 25 miles. write a function rule for the amount of fuel left in the car after every 25 miles

**chemistry**

suppose that you have a micro pipet which delivers 100 drops per cubic centimeter, and a solution of 5.0% by volume of oil in alcohol. if you had used 10 drops of this solution, how many cubic centimeters of pure oil would be left after evaporation of the alcohol?

**Physics**

From top of a tower 160 m high a body is projected upwards with a velocity of 40 m/s making an angle of 30° with the horizontal. Find the time it will take to reach the ground

**Chemistry**

A scientist used 21.0g of NaHCO3. How many miles of NaHCO3 were in this sample?

**english**

can I write By whom was the Taj built? for 3) sentence

**english**

These sentences are from my test in which I answered these sentences incorrectly. So please suggest the right answers to them. 1)Ram said to me,"I go to school daily."(change to indirect speech) 2)He wrote me a letter.(change to passive voice) 3)Who built the Taj?(...

**chemistry**

A flask contains 0.260 mol of liquid bromine, Br2. Determine the number of bromine molecules present in the flask. Express your answer numerically in molecules.

**math**

a man places $700 in an account that accrues interest continuously. Assuming no additional deposit and no withdrawals, how much will be in the account after 10 years if the interest is a constant 7.5% for the first six years and a constant 8.25% for the last 4 years? my ...

**Calculus**

Find the area of the indicated region. We suggest you graph the curves to check whether one is above the other or whether they cross, and that you use technology to check your answer. Between y = x^2 − 4x + 1 and y = −x^2 + 4x − 5 for x in [0, 3]

**Science**

When we evaporate a salt solution salt crystals are left in the beaker or utensil but does the same thing happen in case of sugar solution?

**English**

can someone write a summary of the novel pride and prejudice in 400 words? please

**Grammar**

Depends on the tense in which the sentence has to be used.

**Chemistry**

No. Can you please explain?

**Chemistry**

Which of the following will be more soluble in an acidic solution than in pure water? Ag2SO4 CuI RbClO4 AlPO4 Cd(OH)2 Is the answer the first and second?

**physics**

a projectile is launched outward at an angle theta above an incline plane elevated an angle alpha above the horizon. when the projectile hits the plane it is moving horizontally. prove for this case that the angle theta must satisfy the following relations.

**English**

No, C. I'm reading it for school right now.

**trig**

verify (csc^4-1)/cot^2x=2+cot^2x So this is what I have so far on the left side (csc^2x+1)(cscx+1)(cscx-1)/cot^2x =(csc^2x+1)(cot^2x)/cot^2x i think I'm doing something wrong. Please help!

**Physics**

Block A is 4.5 kg and Block B is 2.25 kg. a. determine the mass of block C that must be placed on block A to keep it from sliding if the coefficient of static friction between block A and the table is 0.2 b. If the coefficient of kinematic friction between the surface and ...

**Chem**

Interpretation of the data plots consistently show that the freezing points of three solutions are too high. As a result of this "misreading of the data," will the reported molar mass of the solute be too high, too low, or unaffected? Explain please.

**Maths**

if a clock loses 2.5 minutes in every hour. how many minutes will it lose from 8 to 12

**social studies**

Who were the Mayans?

**History**

How “new” was the New South in terms of its labor conditions and its race relations?

**math**

How do you solve for (7.5-2cosθ)^2=√{25-4sinθ}^2

**Physics**

A car goes from 12 m/s to 25 m/s in 6.0 seconds. a.) What is the acceleration of the car? b) How far did it travel in the 6.0 seconds?

**Math**

The cafeteria is serving pie for dessert. Each serving will be 1/8 of a pie. how many servings will they be able to make if they have 7 pies?

**Social Studies**

Hi faith! I am writing the same essay and this is what I put about Andrew : Andrew Jackson was most certainly not a jerk. The indian removal and his support for slavery were black marks on his presidency, but he did much more for this country than that. One of his main ...

**Psycology**

code of ethics for counselors, psychologists, social workers, and human services professionals. How are these codes similar and different?

**Help**

What happens to the density of the air in the balloon as it is heated? Also, based on this question.... What would be the Independent variable, Depended Variable, controlled Variable.

**Science help please.....**

What happens to the density of the air in the balloon as it is heated? Also, based on this question.... What would be the Independent variable, Depended Variable, controlled Variab

**Science**

What happens to the density of the air in the balloon as it is heated? Also, based on this question.... What would be the Independent variable, Depended Variable, controlled Variable...

**Science help....**

What happens to the density of the air in the balloon as it is heated?

**Geometry**

Find r if T.A=12Pi and L.A =8Pi

**Educational Technology and Online Learning**

Hello There, Aaliyah, I understand you need help with this Connections Academy lesson for ED Teach it's hard I know as for I am a student myself. That's why I'll give you the right answers for you. :) But I can't always do this for you need to learn what's ...

**English**

I kind of thought it was B hehe

**math answers??? correct me :/**

Heya! All of your answers are right however, question 3 isn't exactly correct. The question says Rename 28% as a decimal a and fraction in its simplest form. And though it is correct that you said it was 0.28 and 28/100, it's still wrong because it said simplest form. ...

**Science**

Here I'll give you the answers B A B A D D B B B B A cells tissue motor neurons energy water microscope then for the first essay question: Computers don't have cells, humans do. Also, we make and manipulate computers, they don't move on their own. They don't ...

**Math**

Well think about it where does 42 lie between? 36 and 49 therefore the answer would be option 2 / B

**Grammar**

Write these telling sentences correctly. Ex look at the hat I see a cat The cat is on the hat The cat will sit and sit There is a picture of a cat on the hat

**math**

a person on a moving sidewalk travels 21 feet in 7 seconds the moving sidewalk has the length of 108 feet how long will it take to move from one end of the sidewalk to the other

**Math**

factor the following polynomial and state the multiplicity of each zero: f(x)= x^5 + 7x^3

**physics**

Hello I'm having trouble with this physics question: You are examining the loss in intensity as light passes through a fibre optic cable. The input intensity is measured as 55.1 W/m2 and the output intensity as 28.7 W/m2. Calculate the attenuation of the signal in decibels...

**Science**

Hi :3 the answers are B A C I sure hope this helps! :D <3

**physics**

A spring and mass system are oscillating with an amplitude of 5.4 cm. The spring constant is 166 N/m and the mass is 540 g. Find the mechanical energy of the system

**English Language & Composition**

Here is my Introduction with my thesis. Introduction: In the workplace, a new security installment begins in the workplace. Workers begin to feel anxious and watched by the placement of cameras above their heads. New abundance of supervision technologies compose a threat to ...

**English Language & Composition**

I need help on what my body paragraphs could talk about. My intro talks about how surveillance technologies can possibly threat civil liberties. I picked quotes from the sources I had to use that could help me in this essay. What are 3 ideas I can say in each body paragraph ...

**English & Composition!**

This is my conclusion to my surveillance essay. Can someone help me revise this or suggest any changes. I tried to make the conclusion as mature as possible to be a college/ university type of conclusion. Any further suggestions would be much appreciated. *I used "society...

**English & Composition**

If you were the teacher, which sentence shoudl be better off in the essay?... Ex 1) (Your example, Thankyou for that) : The attack by a surveillance community on civilization and fundamental privacy righte evokes fear in people. OR Ex 2) A surveillance community attacks ...

**English & Composition**

Thankyou so much!

**English & Composition**

# 3& #4 Are also (DONE)

**English & Composition**

Formal Writing Essay Prompt: Take a position that defends or challenges the claim that the recent profusion of surveillance technologies/ techniques constitutes a threat to civil liberty. (Here is my Introduction) I have to eliminate any linking verbs if possible. CAN SOMEONE ...

**Science**

Neither. The answer is B.

**CHEM**

What concentration of Cl– results when 993 mL of 0.521 M LiCl is mixed with 883 mL of 0.309 M MgCl2? PLEASE HELP! I don't know how to set this up

**Chemistry**

Three colorless solutions in test tubes, with no labels, are in a test tube rack on the lab bench. Lying beside the test tubes are three labels: potassium iodide, KI, silver nitrate, AgNO3, and sodium sulfide, Na2S. You are to place the labels on the test tubes using only the ...

**Math**

Simplify expression, write final answer without negative exponents. (x-3/x-4)- (x+2/x+1) all over (x+3) is the answer: (-8x+5) / x+3 ? please help!

**math**

How much more money do 10 T shirts cost than 6 T shirts?

**chem**

The crucible is handled with oily fingers after its mass measurement but before the 3 gram sample of the hydrated salt is measured. Subsequently, in part B.1, the oil from the fingers is burned off. Will the percent water in the hydrated salt be reported as being too high, too...

**CHEMISTRY**

is this right? 5. After heating the crucible is set on the lab bench where it is contaminated with the cleaning oil used to clean the lab bench but before its mass is measured. The analysis continues where the mass of the anhydrous salt is determined. While heating, the ...

**CHEMISTRY**

I also need help in this please: Suppose the original sample is unknowingly contaminated with a second anhydrous salt. Will the reported percent water in the hydrated salt be too high, too low, or unaffected by its presence? Explain. is it low? if so, can you explain in some ...

**Chem**

If the oil from the fingerprints is burned off completely, then the reported percent water in the hydrated salt is unaffected. However, if the oil from the fingerprints are not completely burned off, the reported percent water would be too high, since the remaining oil will ...

**Chem**

The crucible is handled with oily fingers after its mass measurement but before the 3 gram sample of the hydrated salt is measured. Subsequently, in part B.1, the oil from the fingers is burned off. Will the percent water in the hydrated salt be reported as being too high, too...

**CHEM-CHECK ANSWER**

A 18.46 g sample of a compound contains 5.89 g potassium (K), 5.34 g chlorine (Cl), and oxygen (O). Calculate the empirical formula. is the answer KClO3?

**Chem**

the answer is: KClO3?

**Chem**

A 18.46 g sample of a compound contains 5.89 g potassium (K), 5.34 g chlorine (Cl), and oxygen (O). Calculate the empirical formula.

**pre-calc**

how do you factor 3x^-1/2 + 4x^1/2 + x^3/2?

**MATH**

how do you factor: a^3-b^6 ??? please help!

**CHEMISTRY**

the rest: a. 5.65 g of sodium and 1.42 g of chlorine b. 5.65 g of sodium and 3.39 g of chlorine. c. 5.65 g of sodium and 8.70 g of chlorine d. 5.65 g of sodium and 12.4 g of chlorine

**CHEMISTRY**

sorry! this is the full question: Two samples of sodium chloride were decomposed into their constituent elements. One sample produced 1.78 g of sodium and 2.74 g of chlorine. Which of the following could be the results of the decomposition of the other sample, being consistent...

**CHEM**

Two samples of sodium chloride were decomposed into their constituent elements. One sample produced 1.78 g of sodium and 2.74 g of chlorine. Which of the following could be the results of the decomposition of the other sample, being consistent with the law of constant ...

**CHEM**

PLEASE HELP! Two samples of sodium chloride were decomposed into their constituent elements. One sample produced 1.78 g of sodium and 2.74 g of chlorine. Which of the following could be the results of the decomposition of the other sample, being consistent with the law of ...

**CHEMISTRY**

what is the proper name for C6H14?

**Chem**

What are the systematic names of these ? 1. CuI (s) 2. CoF2 (s)

**chem**

which of the following are mixtures? 1. air (mostly n2 and o2) 2. salt (NaCl) 3. Salt Water 4. Water (h20) is the answer 4 and 2 ?

**Math**

The question says express each repeating decimal as a fraction: 5.23232323 This is my work but my answer doesn't seem right: 100x= 523.23232323 - 10x= 52.23232323 90x= 470.909090 / 90x. \90x x= 5.23232323 What am I doing wrong? And how am I suppose to know when to multiply...

**Precalc Math**

The question says express each repeating decimal as a fraction: 5.23232323 This is my work but my answer doesn't seem right: 100x= 523.23232323 - 10x= 52.23232323 90x= 470.909090 / 90x. \90x x= 5.23232323 What am I doing wrong? And how am I suppose to know when to ...

**Chemistry**

Explain why the appearance of the wood flame is yellow whereas the gas flame most often appears blue.

**Chemistry**

The luminous flame temp is less than the non luminousnonluminous? correct?

**Chemistry**

Is the temperature of a luminous flame greater than that of a non luminous flame? Please explain.

**Physics.**

A glacier advances at 3.9x 10 -6 cm/s. How far will it move in 50000s? How far will it move in 3.3y? Answer in units of cm.

**Math**

Two line segments intersect to form an angle that has a measure of 50.7degrees. What is the measure, in degrees, of an angle that is supplementary to this angle?

**math**

Solve using suitable property [name the property] 1]428 x[-23]+[-428]x(-223) 2] 105 x(-37)

**mathematics :integration**

A particle moves in a straight line through a fixed point O with velocity (4-t)m/s find an expression for its displacement S from this point given that S=5 when t=0

**mathematics : intergration**

A particle moves in a straight line through a fixed point O with a velocity (4-t)m/s find an expression for its displacement S from this point given that S=S when t=0

**Science**

What is the difference between convex and concave lenses??

**mathematics :geometric progression**

The first three terms of a geometric progression are K-3,2K-4,4K-3 in that order find the value of K and the sum of the first 8 terms of the progression

**mathematics**

It's a question in mathematics under geometric progression

**Hill school**

The first three terms of a geometric progression are K-3,2K-4,4K-3 in that order find the value of K and the sum of the first 8 terms of the progression.

**Science**

What is the density of a substance with a mass of 0.0450 kg and a volume of 26.4 ml

**Science Help Plzz**

1. The images above show particles in a medium. Which of the following shows the worst conditions for a sound wave travel? A B C D is the answer A? Which of the following correctly describes a radio wave? A long wavelength and high frequency B long wavelength and low frequency...

**Math**

Hon, this is cheating. If you are having trouble talk to your teacher she/he would be happy to help I'm sure :) I know how hard it is though I'm an 8th grader too. Math can be so stressful!

**science**

The mass of a beaker containing a sample of sodium dichromate was determined to be 68.9 g. After transferring a sample it weighed 56.424 g.Determine the mass (g) of sodium dichromate transferred to the correct number of decimal places