Thursday

August 27, 2015
Total # Posts: 242

**psychics **

you throw a ball straight upward into the air with a velocity of 20.0 m/s, and you catch the ball some time later. a) how long is the ball in the air b)how high does the ball go c) what is the balls velocity when you catch it I don't get how you are suppose to figure this ...
*August 20, 2015*

**Precalculus**

Water is flowing at the rate of 50 m^3/min from a conical reservoir (vertex down) of base radius 45 meters and height 6 meters. What is the water level when the reservoir has 5000 m^3 of water left in it?
*August 16, 2015*

**Calculus**

A box with a square base and no top is to have a volume of 32 ft3. What dimensions use the least amount of material (in other words what dimensions give minimum outside surface area)?
*May 24, 2015*

**math**

the areas of the rectangular faces are: 90, 54, and 60. What is the volume of the box?
*April 29, 2015*

**math**

a rectangle has an area of 48 square yards. For what whole number values of length and width will the rectang,e have the smallest perimeter?
*April 29, 2015*

** math**

for what whole number values of length and width will the rectangle have an area of 60 square yards and a perimeter of 38 yards?
*April 29, 2015*

**PHYSICS PLEASE HELP**

A very large firecracker explodes in the hallway into 3 fragments. Physics students rush to the scene to enrich their knowledge of the law of conservation of momentum. They report that Fragment 1: mass=1.23kg, v=8.70m/s, north Fragment 2: mass =2.60kg,v=6.10m/s,east fragment 3...
*April 28, 2015*

**Physics please help **

He drops a ninja ball device from a height of 10.0m. The mass of the enter device is 190g and the mass of the top (smallest) ball is 2.90g A) calculate the momentum of the device as it hits the ground (ignore air resistance) I know that this answer is 2.66 for sure B) if the ...
*April 28, 2015*

**Math**

Take a four digit number (abcd) and repeat it to make an eight digit number (abcdabcd). This eight-digit number always has at least three different prime factors, unless you start with a certain four-digit number. Which number is it?
*April 15, 2015*

**Math**

On Tuesday, Leslie spent 47 minutes on math homework, 39 minutes on science homework, 52 minutes on English homework, and 44 minutes on history homework. How much time did Leslie spend doing her homework on Tuesday?
*April 6, 2015*

**PHYSICS HELP **

Suppose the aliens watching the show are on the surface of Mars. Mass of Mars: 6.42 x 10^23 kg Radius of Mars: 3.394 x 10^6 m Calculate; A) the weight of a 40.0 kg alien on Mars B) the weight of 40.0kg alien on earh Earth-sun distance:1.50x10^11m Mars-sun distance: 2.28 x10^11...
*March 26, 2015*

**Geometry**

A 3-foot diameter wheel travels at a rate of 45 feet per second. How many seconds does it take for the wheel to make 100 turns?
*March 19, 2015*

**Geometry**

A wheel turns at a rate of 12 turns every 5 seconds. If the wheel travels at a speed of 225 inches per second, what is the wheel's diameter?
*March 19, 2015*

**L.A.**

Is 3 B?
*March 11, 2015*

**L.A.**

is 1. B? 2. A? 3. C? Thanks for the help!
*March 11, 2015*

**L.A.**

Can you help me please? Thanks!
*March 11, 2015*

**L.A**

Hey Callie can you help me with the some questions? Thanks
*March 2, 2015*

**Statistics**

Among the population of criminal justice students, the average score on the final exam was 74, with a standard deviation of 11.6. What is the probability of randomly selecting a student who earned an A (90 or better)?
*February 27, 2015*

**social studies**

Alright.
*February 23, 2015*

**social studies**

Confucius believed that society would do well if everyone always did his or her... A. duty*** B. prayers C. jobs D. best I think it is A
*February 23, 2015*

**Social Studies**

Come onnn my it's the last answer I neeeedd!!!
*February 23, 2015*

**Stats**

A basketball player makes 80% of her free throws. Recently during a very close game, she shot 5 free throws near the end of the game and missed 3 of them. The fans booed. What is the probability of her missing 3 (or more) free throws out of 5? Set up and conduct a simulation (...
*February 8, 2015*

**Language Arts - Iambic Pentameter**

She takes forever to answer one of my friends.
*January 23, 2015*

**language arts**

You really wanted Helper to get a bad grade? Stupid!!!
*January 21, 2015*

**language arts**

You stink Mrs.Sue!!! Just give the kid the stupid answer and be done with it.
*January 21, 2015*

**language arts**

Ms. Sue is no help. Anyway, the answer is C.
*January 21, 2015*

**History**

I'm writing a research paper and i need help finding out what these me on a website. • Timeliness: • Objectivity: • Writing Style and Mechanics: • Graphics: • Links:
*January 18, 2015*

**Math**

1. What is the range of the ages shown in the stem-and-leaf plot? 3|0,2 4|1,4,4,5 5|3,5,8,9 6|2,2,2,5,6,8 7|5,5,6 A. 4 B. 6--- My answer C. 34 D. 46 What is the median of the ages shown in the stem-and-leaf plot? 58 58.5 59---- my answer 59.5 What is the first quartile (Q1) of...
*January 17, 2015*

**Chemistry**

How to perform a pH Titration of 25 ml of 50 mM Phosphoric acid from pH 1 to pH 13 with 1 N NaOH (including standardizing the NaOH).
*January 17, 2015*

**Literature**

Thanks i got it now
*January 17, 2015*

**Literature**

but i still don't get it
*January 17, 2015*

**Literature**

yes
*January 17, 2015*

**Literature **

Dr. Martin Luther King spoke at the funeral of three of the little girls killed in the Birmingham bombing. In his eulogy, he said, “The innocent blood of these little girls may well serve as a redemptive force that will bring new light to this dark city.” He also ...
*January 17, 2015*

**Literature **

The civil rights movement consisted of many events, such as freedom rides and sit-ins. Some of the events, such as fires and murders, were violent and unsettling. But the killing of the four little girls in Birmingham is considered one of the most significant events. Why do ...
*January 17, 2015*

**Physics**

A boat crosses a river of width 115 m in which the current has a uniform speed of 1.84 m/s. The pilot maintains a bearing (i.e., the direction in which the boat points) perpendicular to the river and a throttle setting to give a constant speed of 1.1 m/s relative to the water...
*January 16, 2015*

**physics**

Calculate the force of gravity on a 16 kg mass at Earth's surface. The mass of Earth is 6. 1024 kg, and its radius is 6.4 106 m.
*January 13, 2015*

**chemistry**

matts moped holds 1.9 gal of gas how many milliliters is that show work
*December 16, 2014*

**physics **

A 78 g basketball is launched at an angle of 45.4◦ and a distance of 10.1 m from the basketball goal. The ball is released at the same height (ten feet) as the basketball goal’s height. A basketball player tries to make a long jump-shot as described above. The ...
*November 20, 2014*

**socials studies 9**

why do you think lawyers in the land claims trials refer to the royal proclamation of 1763 more than 200 years after it was proclaimed? I do not understand this question..
*November 8, 2014*

**Physics**

A billiard ball of mass m = 0.250 kg hits the cushion of a billiard table at an angle of θ1 = 58.8° and a speed of v1 = 28.4 m/s. It bounces off at an angle of θ2 = 71.0° and a speed of v2 = 10.0 m/s. (a) What is the magnitude of the change in momentum of the...
*October 31, 2014*

**physics**

A rocket blasts off from rest and attains a speed of 58.9 m/s in 14.4 s. An astronaut has a mass of 57.5 kg. What is the astronaut's apparent weight during takeoff?
*October 28, 2014*

**Advanced algebra**

The number of freshmen entering college in a certain year is 621. What type of data is 621? A. Discrete data B. categorical data C. Continuous data
*August 18, 2014*

**Chem 1120**

Oops, my problem states I2 is a gas. I forgot to include it. so does this change the equation?
*July 13, 2014*

**Chem 1120 **

The KC for the reaction I2 --> 2I is 3.8 x 10 ^ -5 at 727 degrees C. Calculate Kc and Kp for the equilibrium of 2I -> I2 at the same conditions. I don't understand how to set up or solve this problem. I know Kc=[I]^2 / [I2] = 3.8x10^-5 for the first equation but I ...
*July 13, 2014*

**gemotry **

The coordinates of the endpoints of AB¯¯¯¯¯ and CD¯¯¯¯¯ are A(2, 3), B(8, 1), C(5, 2), and D(6, 5). Which statement about the line segments is true?
*May 12, 2014*

**Math**

Using these numbers, 2 4/9, 2 5/9, 2 6/9, 2 8/9, 3, 3 1/9, 3 3/9, 3 4/9 & 3 5/9. Build a square where the sum of every horizontal, vertical, and diagonal row is 9. The square has 3 rows across & 3 rows down for a total of 9 small blocks.
*April 16, 2014*

**Maths**

A debate team of 4 is to be chosen from a class of 29 where the order in which the members of the team are chosen does not matter. There are two twin brothers in the class. How many possible ways can the team be formed which will not include any of the twin brothers?
*March 16, 2014*

**Language Arts**

What is the simple subject in this sentence? These homes are built up from the bottom of the pond. a. these b. homes c. pond
*March 12, 2014*

**Math**

I have 10 dozen potatoes which must be equally divided into 20 bags. How many potatoes will be in each bag?
*March 6, 2014*

**Math**

an airplane is flying a compass of 340 degrees at 325 mph. A wind is blowing with the bearing 300 degrees at 30 mph. Find the component form of the velocity, and find the actual ground speed and direction of the plane.
*February 28, 2014*

**Algebra 2**

Why couldn't the chicken find her egg?
*February 16, 2014*

**math**

My numerator is 6 less than my denominator. I am equivalent to 3/4
*February 11, 2014*

**math**

thanks steve
*February 11, 2014*

**math**

My numerator is a prime number. The GCF of my numerator and denominator is 2. I am equivalent to 1/5.
*February 11, 2014*

**math**

Thank you so much chelle
*February 11, 2014*

**math**

My numerator is divisible by 3. My denominator is divisible by 5. My denominator is 4 less than twice my numerator. plz help very confused!
*February 11, 2014*

**Math**

How do I find a fraction equivalent to 3/4 with a numerator that is 6 less than my denominator.
*February 11, 2014*

**chemistry**

I still desperately need help guys! Homework due TOMORROW!
*January 8, 2014*

**chemistry**

Please explain, in simple English, why is milk a colloid?
*January 8, 2014*

**Physics**

Vector V1 is 6N along the negative axis. Vector V2 is 4.5 N and point 45 degrees north of the x axis. Find the x and y components of each vector and find the resultant R=V1+V2with the components.
*November 26, 2013*

**physics**

an eraser
*November 26, 2013*

**Physics **

A 2 g bullet flying at 390 m/s hits a 2.7 kg aluminum block at room temperature and embeds itself in the aluminum. After everything has come to equilibrium, how much has the entropy of the aluminum block increased?
*November 26, 2013*

**physics**

A 1700 kg car moving south at 19.5 m/s collides with a 2050 kg car moving north. The cars stick together and move as a unit after the collision at a velocity of 5.16 m/s to the north. Find the velocity of the 2050 kg car before the collision. m/s to the north
*November 14, 2013*

**Science help! URGENT. Check answers**

1. False 2. C 3. D That is all I know! sorry! hope these are useful!
*October 21, 2013*

**Physics**

Imagine that if you drop an apple from a certain height, its final speed is 20 m/s when it reaches the ground. If you throw the apple vertically downward from the same height with an initial speed of 20 m/s, what will be its final speed? I tried 2mgh=1/2mv^2 so that the mass ...
*October 7, 2013*

**Physics**

A spring has an unstretched length of 9.8 cm. The potential energy stored in the spring is V when the spring is streched to a length of 11.8 cm. What is the stretched length of the spring when its potential energy is 2.2 V? What compressed length will result in a potential ...
*October 7, 2013*

**Calculus**

Determine whether Rolle's Theorem can be applied to f on the closed interval [a,b]. If Rolle's Theorem can be applied, find all values of c in the open interval (a,b) such that f'(x)=0. f(x) = x^(2/3) - 1 [-8,8] I plugged in both values and found out that they both...
*September 26, 2013*

**science**

i think its c but i'm not sure science is not my strong suit. this one is difficult.
*September 25, 2013*

**math**

Hi! I'm Maddie. I need some help on my homework. Here are three problems I need help with: A bowl contains only red marbles, blue marbles and green marbles. The probability of selecting a red marble from the bowl is 3/13. The probability of selecting a blue marble from the...
*August 21, 2013*

**Math**

Assuming lambda=0.02 and t=50, compute P(2)
*June 25, 2013*

**Math**

What is the range of values of the probability of an event?
*June 25, 2013*

**math**

You want to put $4,000 in a simple interest account. It has a 2.5% annual interest rate. How long will it take you to earn $500 in interest?
*May 27, 2013*

**Math**

How do you add fractions??
*May 14, 2013*

**physics**

What would be the final temperature when 125g of 25 degrees Celcius water is mixed with 85g of 45 Degrees Celcius water? ( hint: Equate the heat gained by the cool water with the heat lost by the warm water.)
*May 3, 2013*

**7th Grade Language- Arts Ms.Sue~!**

I just did the test and got 100% 1: A 2: c 3: B 4: D 5: B
*April 24, 2013*

**Math**

How do you find the total number of maximum and minimum points of the function whose derivative is given by f^1(x)=x(x-3)^2(x+1)^4 ???
*April 21, 2013*

**Chemistry**

Calculate the pH at the equivalence point when 50 mL of 0.098 M propionic acid is titrated with 0.340 M NaOH. I tried solving for the volume of NaOH and them using the total volume and then plugging it in to [H+][A-]/[HA] and used the Ka value for propionic acid but it was not...
*April 15, 2013*

**Chemistry**

Calculate the pH of a buffer solution that contains 0.60 M NaH2PO4, and 0.26 M Na2HPO4.
*April 14, 2013*

**Chemistry**

The pH of an 0.0870 M solution of weak acid A is 2.20. The pH of an 0.0830 M solution of weak acid B is 4.07. The pH of an 0.0890 M solution of weak acid C is 5.13. Identify the three acids from among those listed below (the Ka values are listed in Appendix E of your textbook...
*April 12, 2013*

**Chemistry**

I'm not really sure how to go about doing this problem... What is the pH of a 7.40 x 10-3 M solution of NH4Cl? Help is appreciated! Thank you
*April 7, 2013*

**algebra**

write and inequality describing this region. will an 18 wheeler hold 71 refrig's and 118 tv's or will it hold 51 refig's and 176 tv's?
*March 24, 2013*

**Chemistry**

Awesome! Thank you
*March 14, 2013*

**Chemistry**

An aqueous antifreeze solution is 31.0% ethylene glycol (C2H6O2) by mass. The density of the solution is 1.039 g/cm3. Calculate the molality of the ethylene glycol.
*March 14, 2013*

**Chemistry**

Thank you :)
*March 14, 2013*

**Chemistry**

A solution of hydrochloric acid (HCl) contains 22.5% hydrochloric by mass. What is the molality of this solution I'm not sure how to start this problem...
*March 14, 2013*

**Chemistry**

maybe my homework set online is messed up because it is not taking either of these answers :( sorry. But thank you both for your help!
*March 14, 2013*

**Chemistry**

hmmm for some reason this did not work... How did you go about solving this problem? Could any of them be a tie?
*March 14, 2013*

**Chemistry**

Rank the following compounds in order of their solubility in water. (most soluble = 1 -- least soluble = 4)--Note that for the same solubility rank the same (a tie). (CH3)2CHOH HOCH2CH(OH)CH2OH CH3CH2OH (CH3)3COH
*March 14, 2013*

**Chemistry**

Thank you so much!
*March 14, 2013*

**Chemistry**

What is the molarity of nitrate ions in a solution containing 2.20 mg of Mg(NO3)2 dissolved in 7.35 L of water?
*March 14, 2013*

**math**

If x = 15 units, y = 7 units, and h = 4 units, then what is the area of the trapezoid
*February 11, 2013*

**Algebra**

Find the integers from 1 to 144 which are perfect squares and write the square root of each one.
*February 5, 2013*

**Math**

Ten boys are to share 3 3/4 pounds of candy equally. How much candy does each boy get?
*February 3, 2013*

**Math**

1). How many shelves each 2 3/4 feet in length can be cut from a piece of lumber that is 15 2/3 feet long?
*February 3, 2013*

**Chemistry**

What mass of CH4 is contained in a 443 mL sample of CH4 at −32◦C and 282 torr? Answer in units of g. I tried so many times and I don't get it!
*January 16, 2013*

**Urgent language arts**

True of false 1. In a persuasive essay, the thesis statement should represent an opinion. A. True B. False 2. The most common structure of a persuasive essay is A. Order of importance B. Chronological order C. Problem and solution 3. Which of the following is NOT a sentence A...
*December 17, 2012*

**Stats Repost**

0.057
*December 17, 2012*

**trig**

If tan y = -4/3 and y is in Q I'VE find cos 2y
*November 27, 2012*

**trig**

If tan y = -4/3 and y is in Q I'VE find cos 2y
*November 27, 2012*

**math**

a ship sail S 40 degrees W four 4 hours how do i figure out this question
*November 27, 2012*