# Posts by rose

Total # Posts: 1,305

**math**

The function h(t)= 2 + 50t - 1.862t^2, where h(t) is the height in metres and t is the time in seconds, models the height of a golf ball above the planet Mercury's surface during its flight. a) What is the maximum height reached by the ball b) How long will the ball be ...

**social studies**

Help Plz, why did improvement in agriculture lead to the growth of cities is D Feudalism :)

**math**

Kool Klothes has determined that the revenue function for selling x thousand pairs of shorts is R(x) =-5x^2 + 21x. The cost function C(x) = 2x + 10 is the cost of producing the shorts. How many pairs of shorts must the company sell in order to break even

**math Functions**

The function h(t) = 2 + 50t -1.862t^2, where h(t) is the height in metres and t is the time in seconds, models the height of a golf ball above the planet Mercury's surface during its flight. A) What is the maximum height reached by the ball (would it be 1.862) B) How long ...

**algebra**

factor polynomial by grouping 3z^3+2z-12z^2-8

**healthcare**

Health care in Canada is funded by which government? I know Canadas healthcare system is funded by a provincial or territorial basis

**MATH**

FROM NOON TO 8 PM, THE TEMERATURE DROPPED 12.8 DEGREES. WHAT WAS THE HOURLY CHANGE IN TEMERATURE DURING THIS TIME??

**art**

Ms. Sue my school does not even provide me a science book. I don't have a art book either to help me out. So I come here to get help

**french**

Ok thank you so much it will help a lot

**french**

Ce que or ce qui? 1. _______ est evident pour tout le monde, c'est la raison de cette manifestation. 2. _________ le gouvernement va creer, ce sont des emplois pour les jeunes. I am having difficulty understanding when to use ce que or ce qui in a sentence

**religion**

It has to be anothers persons opinion, so yes your opinion

**religion**

What are benefits and challenges you can experience in trying to love according to biblical teachings? What are benefits and challenges you can experience among people of different cultures and faiths?

**Science**

Given the following balanced equation, determine the rate of reaction with respect to [O2]. 2 SO2(g) + O2(g) → 2 SO3(g)

**Science**

If the concentration of AgCl drops from 1.000 M to 0.655 M in the first 30.0 s of the reaction, what is the average rate of reaction over this time interval?

**Translate verbal expression into Algebraic express**

Five friends went to a baseball game. Three of the friends each bought a ticket for x dollars and a soda for $6.00. The other two friends each bought only tickets. Write and simplify an expression that represents the amount of money spent. Answer: 3x + 3(6) + 2x 3x + 2x + 16 ...

**health**

Why is health care recession proof?

**algebra**

I meant to say at the end that if: x=5 and y=2 and you plug them into the 2 equations that answer are different. x+y=6 (5)+(2)=7 , not true x-y=4 (5)-(2)=3 Hope this helps

**algebra**

x+y=6 -(x-y=4) ________ 2y=2 - - <divide both sides by 2, to get y 2 2 ______ y=1 Set x+1=6 x=6-1=5 ____Need to check y=2 and x=5 if its true -------- 5+2=7 not 4 5-2=3 not 4 {No solution}

**chemistry**

Find the percentage composition of (NH4)3PO4 What i don't understand is if the mass of the element isnt given how would i calculate?

**Math**

Hi Robin Yep that is correct.

**algebra**

y=20x+12 if x=number of hours rented example I want to rent the sailboat for 3 hours. The life jacket is a fixed number and doesnt change, so we just tack that on the the end of the equation. Y= total amount spent y=20(3)+12 y=72 (you spent 72 dollars for 3 hours on the boat)

**Algebra 2**

Whar are you trying to solve: =log 0.1 1000

**Physics**

h=1/2gt -2m=1/2gt -4m=gt -4m=(-9.8m/s^2)t -4/(-9.8m/s^2)=t

**Physics**

A small rocket is fired in a test range. It rises high into the air and soon runs out of fuel. On the way down it passes near an observer (sitting in a 21.5-m-high tower) who sees the rocket traveling at a speed of 35 m/s and moving in a vertical plane at an angle of 56° ...

**physics**

Please help... i am really stuck

**physics**

A 425 g model rocket is accelerated upward at 86 m/s2 by its engine. What is the value of the force exerted by the engine on the rocket?

**PLEASE PLEASE HELP ME**

i need one sigh of discrimination here's my work The most obvious form of discrimination is skin color. Crooks is segregated in view of his skin shade. “They play cards in there, but I can't play because I'm black. They say I stink.”(pg. 34) This quote ...

**English (of mice and men) PLEAS**

i need one sigh of discrimination here's my work The most obvious form of discrimination is skin color. Crooks is segregated in view of his skin shade. “They play cards in there, but I can't play because I'm black. They say I stink.”(pg. 34) This quote ...

**chemistry**

A 6.00 L balloon contains helium at SATP at ground level. What is the volume when it floats up to an altitude where the temperature is 10.0 degrees C and atmospheric pressure is 91.5 kPa

**Chemistry**

In an acid base titration 32.5 mL of sodium hydroxide, NaOH, were neutralized by 17.6 mL of 0.180 mol/L sulfuric acid, H2SO4. Calculate the concentration of the sodium hydroxide.

**Chemistry**

Write the total ionic and net ionic equations for each of the following reactions: A) hydrobromic acid with potassium hydroxide B) Nitric acid with barium hydroxide

**chemistry**

Classify each substance as either arrhenius acid or base: A) HF (aq) B) Ba(OH)2 (aq) C) H2SO4 (aq) D) NH4OH (aq) My work A) arrehenius acid B) arrhenius base C) arrhenius acid D) arrhenius base Am i right

**mah**

holly spend 7 and 3/5 hours in school each day. her lunch period is 1/2 hour long, and she spends a total of 7/10 hour switching rooms between classes.the rest of her day is spent in 6 classes that are all same length. how long is each class?

**language arts**

Thanks for the answers I got 100%!!

**Physics**

A block and tackle with a velocity ratio of 5 is used to raise a mass of 25kg through a vertical distances of 40cm at a steady rate.if the effort is equal to 60N,determine.(a)The distance moved by the effort.(b)The workdone by the effort in lifting the load.(c)The loss in ...

**chemistry. please help drbob222**

One of the reactions involved in the smelting of copper sulfide ores involves copper (I) oxide and copper (I) sulfide: 2Cu2O2 + Cu2S ---> 6Cu + SO2 Assuming that 35.00 g of copper (I) oxide is heated with 25.00 g of copper (I) sulfide A) determine which reagent is present ...

**chemistry check if my answers are right. drbobzz**

I also have another chemistry question that i am stuck on.

**chemistry check if my answers are right. drbobzz**

So A would be 147.5 and C) 33.22

**chemistry check if my answers are right. drbobzz**

A) mass of O2 = (48.0 C2H2/26.04 g/mol)(5O2/2C2H2)(16.00 g/mol) = 73.7 g of oxygen C) mass of H2O = (48.0 g C2H2/26.04 g/mol)(2H2O/2C2H2)(18.02 g/mol) = 14.8 g of water

**chemistry check if my answers are right. drbobzz**

Acetylene gas(c2h2) is used in welding. During one job a welder burns 48.0 g of acetylene. Using a balanced equation for the complete combustion of acetylene calculate the following. Equation 2C2H2 + 5O2 ---> 4CO2 + 2H2O A) the mass of oxygen used B) the mass of carbon ...

**chemistry**

Acettlene gas (C2H2) is used in welding. During one job, a welder burns 48.0 g of acetylene. Using a balanced equation for the complete combustion of acetylene, calculate the following: Balanced Equation a) the mass of oxygen used b) the mass if carbon dioxide produced c) the ...

**Chemistry**

CuSO4.xH2O Determine the percent by mass of water in your sample of hydrated copper (II) sulfate. Show your calculations clearly. My work. i got 10% is that correct

**physics**

The temperature of the air is 20.0 degrees Celsius when a tourist drops a coin into a wishing well. She hears the splash 5.30 s after drops the coin. If air resistance is ignored, how deep is the well?

**Physics**

so is the answer D correct?

**Physics**

Which wave of the following wavelengths could not make a standing wave in a 1.0 m string, with nodes at both ends? A. 2.0 m B. 1.0 m C. 0.75 m D. 0.50 m E. 0.25 m i think the answer is D

**Physics**

ok thank so much! it makes senses

**Maths**

Jake mixes pineapple, orange and lemonade in the ratio of 1:2:4. If he has 3 parts pineapple, how much orange and lemonade does he need?

**biology**

Are Lilac flowers vascular or non vascular

**Biology**

Is a Lilac Flower: a) Vascular or non-vascular b) Gymnosperm or angiosperm c) Monocot or a dicot My Work i know c) is dicot but i am not sure of the other two

**Physics**

A woman on a bicycle traveling at 10m/s on a horizontal road stops pedaling as she starts up a hill inclined at an angle of 10° to the horizontal. How far up the hill does she travel before coming to rest? I really don't understand this question. Please help!

**Physics**

A meteorite weighing 1860N strikes the earth with a velocity of 45.2m/s. What is its kinetic energy? Write in SN to one decimal place. When I plugged in (1/2)(1860N)(45.2m/s)^2, I got the answer 1.9e6, but it was incorrect. Please help. I'm really confused!

**Algebra please help out**

Two games went a total of32 mins one goes 12mins longer than the other .use letter to represent the unknown. Solve the problem

**Physics**

Calculate the power needed from the motor of an elevator for it to be able to lift a 1x10^4kg mass a distance of 20m in 5s. (Enter your answer in scientific notation utilizing "e" format and rounding the decimal value to one decimal place.) I used the equation p = w/...

**arithmetic**

How do I solve 15x=75?

**arithmetic**

How do I solve .15x=75

**arithmetic**

If you spent 85% of your money and have only $75.00 left, how much money did you start with?

**machnics**

The equations of motion are derived from the indefinite integral of acceleration.verify

**Astronomy**

How much does the luminosity of a spherical source of blackbody radiation increase if you triple its size?

**Astronomy**

If some external force were able to compress the sun, how would the sun react and why?

**chemistry**

I don't understand

**chemistry**

Complete and balance the following reactions, where applicable. If no reaction occurs, write N.R. Li + H2O ----> KCI + F2 ---> Au + HNO3 ---> CI2 + NaF ----> Li + Fe(NO3)3 --->

**Physics**

Three children are fighting over a toy. One child pulls on the toy with a force of 100N at an angle of 37° north of east. The second child pulls on the toy with a force of 200N south. The third child pulls with a force of 250N at an angle of 20° south of west. Watching...

**Physics**

A satellite orbits a planet at 4000m/s, and the acceleration of gravity (centripetal acceleration) on the satellite is 0.58m/s2. What is the diameter of the orbit of the satellite? (Enter your answer in scientific notation utilizing "e" format and rounding the ...

**Physics**

A cord 0.65m long exerts a centripetal force of 23N on a whirling 2kg mass tied to the end of the cord. What is the velocity of the whirling mass? Round to nearest tenth. For this problem, I used to formula V = square root of f/rm. I did the square root of 23/0.65(2) = 8.4m/s^...

**MATH ASAP**

2.)D-about 20 3.) A- about 48 4.) A- about 8 5.) C- 3 modes What number is underlined on #1?

**Biology**

A couple has a child with an autosomal recessive form of glycogen storage disease, a deficiency of a lysosomal enzyme. An enlarged liver and heart and weak muscles cause the baby to die from heart and lung failure at 20 months. Now the woman is pregnant again. Her doctor ...

**Algebra HELP!**

The student bookstore had a textbook for sale at $89.95. A student found the textbook on eBay for $62.00. If the student bought the book on eBay, what percentage of the cost of the bookstore book did she save?

**Algebra, help please!!!**

Solve for x in each of the following: a: 2/3x = 11/6 b: 3/4 / x = 1/3 c: 5/6 - 2/3x = 3/4 d: 2x/3 + 1/4 = x/6 - 1/2 Please help me and explain, I don't get fractions at all!

**statistics**

The physical plant at the main campus of a large state university receives daily requests to replace florecent lightbulbs. The distribution of the number of daily requests is bell-shaped and has a mean of 42 and a standard deviation of 10. Using the empirical rule (as ...

**Chemistry**

Naturally occurring copper is a mixture of two isotopes. One of these has 34 neutrons the other has 36. If the relative atomic mass of copper is 63.55 amu calculate the natural abundances (percentages ) of the two isotopes.

**Algebra**

Find the first five terms of the sequence whose nth term is given. a: (-2)n + 2n b: n squared(-1)n c: |10-n squared|

**Microbiology**

What is the preferred method of sterilization for heat-sensitive solution? In addition, note a heat-sensitive solution that can be sterilized using the method you noted. a. Preferred method: b. Example:

**Microbiology**

How would you disinfectant a plastic chair surface contaminated with blood in the hospital? (Please note in detail the steps required for personal protection, initial clean-up, follow-up disinfection, and the disposal methods of contaminated items) a. Personal protection ...

**Microbiology**

Explain why regular hand soaps are good de-germing agents but poor antimicrobial agents

**Microbiology**

If you are formulating a new chemical disinfectant for bacterial control in the home, note two factors that you would take into consideration when designing this disinfectant. a. b.

**Microbiology**

A patient with an active case of Mycobacterium tuberculosis (TB) was treated and released from the hospital. You are responsible to oversee the decontamination of the patient’s room. Explain why is it a concern if the beside roll-away table has dried-up sputum on it from ...

**Microbiology**

Name a pathogenic bacterium (provide genus and species names) and the disease caused in humans that is typically spread by healthcare professionals in a healthcare facility due to improper techniques. In your explanation, provide an example how this bacterium could be spread ...

**Microbiology**

How would you disinfectant a plastic chair surface contaminated with blood in the hospital? (Please note in detail the steps required for personal protection, initial clean-up, follow-up disinfection, and the disposal methods of contaminated items.) a. Personal protection ...

**Microbiology**

What methods would you use to sterilize and clean a lab coat contaminated with a broth culture of Vibrio cholerae so that the lab coat could be safely used again? a. Method of sterilization: b. Method of cleaning: c. Name which method would be implemented first:

**Microbiology**

Name a pathogenic endospore-forming bacterium (provide genus and species names) which can be associated with improperly canned beans. Note what method is used to process canned beans. If the canned beans are not properly processed and these pathogenic endospore-forming ...

**Math**

thxs got a A+ because of u :)

**Science**

An object has a volume of 22 liters and a mass of 35 kilograms what's the objects density?¿???????????????

**Economic**

The Admissions Director (AD) wants to determine the optimum number of students for each ECO561 class. You are provided with the following data: Tuition is $1250 per student. Instructor Pay $2500 Other incidental (variable) costs - $1000.00 Variable cost increases by 10% per ...

**Language Arts**

sorry I meant what is a diminutive?

**math**

Simone rents a compact car that gets 31 miles per gallon. When she rents the car, the price of a gallon of gas is $3.10. The cost C of the gas used to drive the car is a function of the number of miles x that the car is driven. The cost of renting the car is $0.10 per mile ...

**Grade 11 Physics**

Average speed: Bill and Amy want to ride their bikes from their neighborhood to school which is 14.4 kilometres away. It takes Amy 40 mins to arrive at school. Bill arrives 20 mins after Amy. How much faster(in meters/second) is Amy's average speed for the entire trip?

**english**

d,c,d,b checked on my quiz..

**physics**

calculate the amount of heat energy required to melt a 1kg iron ingot initially at 20 ¡ãC? (heat of fusion for Fe is 33.0 J/g

**chemistry**

Describe how the structure of polyethylene impacts its function in terms of chemical bonding and intermolecular forces

**English! - Help!**

8. is b surprise endings and 9 is a the necklace

**Spanish**

Thanks soo much!!! btw i forgot to write my name but any ways thanks again^__^

**Spanish**

Thanks i really need this help.

**Spanish**

Spanish Help Me Plz!!^__^ _________ 1. La Marcha _________ 2. La Cruz de Guía _________ 3. La Bulla _________ 4. Los Nazarenos _________ 5. El Paso del Cristo _________ 6. Los Penitentes _________ 7. El Paso Palio a. crowds of people b. the members of the fraternity, ...

**science**

Thank you so much Jack! I got 100% If you feel nervous about his answer, don't . He's not lying~ Thnx Jack~ :)

**English**

C is incorrect

**math**

a plane leaves Vancouver headed for Toronto of a speed of 700 km/hr. Half an hour later a planes leaves toronto headed to vancouver travelling at a spped of 750 km/hr. the distance between vancouver and toronto is 3420 kn. How long after the plane leaves vancouver will it pass...

**math**

how much is 8 liters jug water he fills 9750 millimeters pitchers with water how much water is left?

**geometry**

3 times the complement of an angle is 30 more than the supplement of the original angle. What is the measure of the angle?

**Computer Literacy**

Eight

**Physics**

f a 40 kg weight and a 200 kg weight each dropped from 1 m above the trampoline, find the final position of each weight. Assume the trampoline is a simple spring obeying Hooke's law with a k value of 12 000 N/m. I was able to get the answer to this, using mg(h+x) = 1/2kx^x...