Tuesday
July 22, 2014

Posts by Olivia


Total # Posts: 410

math
If the tax on an item is $16 and jerry wanted to buy two how much would the two items cost without the tax? Hint: Tax is 20% of the cost of the item.

maths
okay i got it!thanks!!

maths
why3x+3=0 ??

maths
Given(3x+3)/(6y+1)=3,find the value of7x/3y.

Chemistry
In aqueous solution, hydrochloric acid, HCl, and sodium carbonate, Na2CO3 react to produce gaseous carbon dioxide, CO2, water, H2O and sodium chloride, NaCl. A 10.0 g impure sample of Na2CO3 is dissolved completely in water; then treated with 3.00 mol L−1 HCl to evolve 1...

English 8
Infinitive phrase and how it is used My gram taught me to make lentil soup To make lentil soup infinitive I'm not sure if it is a noun or adv.

English8
Find infinitive phrase and tell if itis used as a noun adj or adv To have a balanced diet keep the food triangle in mind. To have a balanced diet is phrase. Is it an adverb

math
Andre picks a card at random. Without putting the first card back, he picks a second card at random. What is the probability that both cards will be hearts. The cards showing are three hearts and two diamonds

math
i dont understand what they are asking me to do when they give me a quhat looks like this (write acute,right,or obtuse for each angle 1.AFD 2.BFD and thers a bunch of line that intersect off to the side

Physics
A 30m high cylindrical water tank has a diameter of 14m. The tank is two-thirds full of water. What is the pressure at the bottom of the tank?

math
John had $24.He spent 2/3 of his money.How much he has left.

Chemistry
A solution is prepared by mixing 45.00 mL of 0.022 M AgNO3 with 13.00 mL of 0.0014 M Na2CO3. Assume volumes are additive. Calculate [Ag+], [CO32-], [Na+] and [NO3-] after equilibrium is established.

Chemisty
Consider a 1.50 L aqueous solution of 3.75 M NH3, where 17.5 g of NH4Cl are dissolved. To this solution, 5.00 g of MgCl2 are added. a. What is [OH-] before MgCl2 is added? b. Will a precipitate form? c. What is [Mg2+] after equilibrium is established? I don't need the answ...

physics
The position of a particle moving along the x axis is given by x=3.0t^2 - 1.0t^3 , where x is in meters and t in seconds. What is the position of the particle when it achieves its maximum speed in the positive x direction

Chemistry
Thanks so much! I never would've figured that out.

Chemistry
A saturated solution of calcium chromate (CaCrO4) freezes at -0.10 C. What is Ksp for CaCrO4? Assume complete dissociation. The density of the solution is 1.0 g/mL.

Chemistry
When excess NaOH is added to Zn(OH)2, the complex ion Zn(OH)4 2- is formed. Determine the molar solubility of Zn(OH)2 in .10 M NaOH. Compare with the molar solubility of Zn(OH)2 in pure water. I thought I knew how to do this problem, but I'm not getting the right answer. I...

Chemistry
*To be entirely correct, you'll want to use the values for hydrogen and oxygen gas. I'll let you figure those out, along with the molar ratios for hydrogen gas and water and oxygen and water.

Chemistry
Using the molar masses of hydrogen and oxygen, you can discover your limiting reactant (the reactant that would produce the least water). The water produced by your limiting reactant would be the amount of water formed. (2.4 g H)(1 mol H/1.008 g)(1 mol H20/2 mol H)=1.19 mol H2...

Chemistry
Use standards entropies and heats of formation to calculate delta Gf at 25C for a. cadmium (II) chloride (s) b. methyl alcohol, CH3OH (l) c. copper (I) sulfide (s) I really have no idea where to start with this problem. I have no idea how to calculate delta Gf, and everything ...

Physics
A daredevil decides to jump across a 15 m wide canyon on his motorcycle. The opposite side of the canyon is 3 m lower than the side the daredevil starts on. The daredevil drives his motorcycle off the cliff at a speed of 27 m/s. How long does it take the daredevil to cross the...

Math
j+4/6=8/12

American History
Why did the 21 amendment repeal the 18 amendment?

calculus
Find the derivative of the function. G(y) = (y − 1)3/ (y2 + 2y)7

probability
if you have a spinner with 3 parts. 1 white 2 blue. and you spin the spinner 90 times how many times do you expect the spinner to land on blue

math
Recently a census was taken on space station Gamma. Of the 100 residents interviewed, 75 traced their ancestry to the planet Omicron, 85 traced their ancestry to the planet Omega and 60 residents traced their ancestry to both planets. How many residents had ancestors from ONLY...

Math
IDK

geography
We need help with finding Canada's fourteen capitals can u help us please

geography
We need help with finding Canada's fourteen capitals can u help us please

Basic Physics
2.5 h = 9000s 10m/s x 9000s = 90000m

Government
United States

Government
The President can choose to get rid of democracy. True or False?

Math
What is the integral of dx/(x^3-9x)? Please post steps too please!

math
Yes. Thank you.

math
If = sin-10.398, then =_____o_____' _____". Round to the nearest second.

giving up
i'm depressed that no-one has answered my science question so i'm giving up and i don't care if i fail my science because it will be all googles fault the only thing i know about the xenon 135 is that it's a tennis/squash racket and i needed the element xenon 1...

none
read my question above

Science
Identify and describe the type of radiation emitted during the radioactive decay of the radioisotope xenon 135

math
a jar contains two red and five yellow marbles. A marble is drawn at random and then replaced. A second draw is made at random. find the probability that both marbles are red?

chemistry
magnesium in flashbulbs burn according to the equation 2Mg + O2 ---> 2MgO what mass of Mg combines with 5.80 L of O2 measured at STP?

english
St. Patricks day is on March 17, every day. i am glad to answer this question for you.

Physics
i am not sure

geometry
The ratio of two similar prisms is 2:5 the volume of the larger is 375cm3 if sand is being poured into the smaller prism at 3cm3 per second how many seconds will it tAke to fill the smaller prism?

Math
10 cups

Math
Suzanne has a liter of apple juice. How many cups with a capacity of 100 mL can she fill with apple juice?

math
A basketball has a diameter of 29.5 inches. If the basketball is fully inflated, about how many cubic inches of air will it hold?

English
Which senses are appealed to in these lines from Macbeth? Nay, had I pow'r, I should / Pour the sweet milk of concord into hell, / Uproar the universal peace… A. smell, taste, and touch B. hearing, sight, and smell C. sight, taste, and hearing D. hearing, taste, and t...

Math
find the average rate of change from 1 to x Find the average rate of change from 1 to 3 Using f(x) = -2x^2+6x

Math
find the average rate of change from 1 to x Find the average rate of change from 1 to 3 Using f(x) = -2x^2+6x

Mathematics. Geometric sequences.
2+4+8+...is a geometric sequence. Prove the sum of the first n terms is two less than the (n+1)the term.

Government
When has the constitution protected 2 fundamental principles? When has it failed to protect 2 fundamental principles?

Chemistry
How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr? And would i just convert 697 torr into atm and use that for pressure? And how do i find the molar mass of the ...

Chemistry
It takes 200. seconds for a sample of carbon dioxide to effuse through a porous plug and 280. seconds for the same volume of an unknown gas to effuse under the same conditions. What is the molar mass of the unknown gas? Enter your answer to 3 significant figures.

Chemistry
So would i just convert 697 torr into atm and use that for pressure? or what do i do with the 25C/760?

Chemistry
How many grams of oxygen are collected in a reaction where 247 mL of oxygen gas is collected over water at a temperature of 25°C and a total pressure of 697 torr?

Math
Write an equation you could use to solve each problem. Solve each equation by systematic trial. Josie had only nickels in her purse. The value of the coins was 80 cents. How many nickels were in Josie's purse?

Physics
A total of 100000 kg of water per second flows over a waterfall 30 m high. If half of the power this flow represents could be converted into electricity, how many 100 watt lightbulbs could be supplied?

Social Studies
what 5th grade social studies word starts with Y,Z,and N?

math
I family of ducks contains 7 ducks which are 44 lbs. The other wieghs 32 lbs (no amount of ducks given) How much does each duck and duckling weigh in each group THEY HAVE TO WEIGH THE SAmE IN EACH GROUP

Problem Solving: Writing to Explain
how do you order least to greatest for fraction 3/12 1/6 and 1/3

math
Andy and Sam are saving money to go on their senior trip. The amount of money that Andy will have at the end of each week, w, can be expressed at A(w) = 20w + 300. The amount of money that Sam will have at the end of each week, w, can be expressed at S(w) = 15w + 400. They hav...

math
What is 43 over 15

Science
Can you explain tectonic plates?

Physics
Ocean waves pass through two small openings in a breakwater. This time the openings are d = 21 m apart. You're in a small boat on a perpendicular line midway between the two openings, L = 80 m from the breakwater. You row x = 32 m parallel to the breakwater and find yourse...

PLEASE HELP!! DESPERATE!!! (MATH)
The derivative of a function is f'(x)=x(x+2)(x-5). Find the value of x at each point where f has a (a) local maximum, (b) local minimum, or (c) point of inflection

Math
The derivative of a function is f'(x)=x(x+2)(x-5). Find the value of x at each point where f has a (a) local maximum, (b) local minimum, or (c) point of inflection

Math
For y= (3x)/(2e^x+e^-1), use graphing techniques to find the approximate intervals on which the function is: a) increasing b) decreasing c) concave up, d) concave down then find any e) local extrema f) inflection points

Math
Thank you :)

Math
A runner is 22 km east and 15 km south of his starting point, how long would it take him to return to his starting point in a direct Line if he can run at 10 km per hour?

Math
Yes Steve I did @ first get 2.66 can u help me?

Math
I got 2 hrs and 40 mins approximately right?

Math
So I just round it ? Yep thanks

Math
Btw related to the question I asked: how long would it take him to return to his starting point in a direct line if he can run at 10 km per hour?

Math
Thank you so much ! :D

Math
A runner is 22 km east and 15 km south of his starting point. How far is he in a direct line from his starting point?

Physics
A 1.9 kg ball is attached to a ceiling by a string. The distance from the ceiling to the center of the ball is 1.13 m, and the height of the room is 3.00 m. (a) What is the gravitational potential energy associated with the ball relative to the ceiling? J (b) What is the gravi...

Physics
An object with a weight of 30 newtons is placed on a flat, level surface. What is the normal force that the surface pushes on the object with?

Math
Another way to write 44n would be 44 x n because you are multiplying 44 by n, not dividing them.

Fractions
I'm pretty sure it would have traveled 18.5 miles. Try drawing it out on a graph (7.5 down, 3.5 right, etc.). Then add up all the distances it traveled right up to where it reaches a position where it already went. Hope this makes sense.

Math- Calculus
Locate the absolute extrema of the function on the closed interval: y= 4/x+tan(pix/8), [1,2]

Math
First you have to find the derivative of g(x). Then set that equal to 0 and solve for the value(s) of x. Then plug your critical #'s into the original equation. The largest # will be your relative max and the smallest # will be the relative min.

Statistics
Let’s suppose a randomly selected sample of 75 American teenagers watches an average of 1472 hours of television per year with a standard deviation of 250 hours. Construct the 95% confidence interval (CI) for the mean number of hours American teenagers watch television pe...

MATH
mark scores 6 points. amy scores 11 points. how many points does mark need to tie the game? WRITE A NUMBER SENTENCE TO SOLVE. THANK YOU

MATH
mark scores 6 points. amy scores 11 points. how many points does mark need to tie the game? WRITE A NUMBER SENTENCE TO SOLVE. THANK YOU

Physics- Projectiles
A marlin jumps out of the water with an initial velocity of 5.0 meters per second at an angle of 80 degrees above horizontal. Approximately what maximum height will the marlin reach during it's flight?

physics
A person wants to push a lamp (mass 7.2 kg) across the floor, for which the coefficient of friction is 0.23. Calculate the maximum height above the floor at which the person can push the lamp so that it slides rather than tips (Fig. 9-62).

AP Chemistry
Consider the following reaction. CaSO4(s) Ca2+(aq) + SO42-(aq) At 25°C the equilibrium constant is Kc = 2.4 10-5 for this reaction. (a) If excess CaSO4(s) is mixed with water at 25°C to produce a saturated solution of CaSO4, what are the equilibrium concentrations of C...

physics
a place kicker must kick a football from a point 32.0 m from the goal. As a resultof the kick, the ball must clear the crossbar, which is 3.05 m high. When kicked, the ball leaves the ground with a speed of 23.0 m/s at an angle of 53 degrees to the horizontal. To determine if ...

AP Physics C
when a block is pulled out to x=+4.0cm, we must apply a force amgnitude 360N to hold it there. we pull the block to x=11cm and then realease it. how much work does the spring do on the block as the block moves from xi=+5.0cm to a)x=+3.0cm, b)x=-3.0cm, c)x=-5.0cm, d)x=-9.0cm?

Science
Thank You

Science
What is the basic unit for volume?

Algebra II
Factor: 18x^2-33x+9

Algebra II
Group factor: x^2+2x^2+x+2

Algebra II
Factor: 12a^2-17a-5

calculus and physics
An explosion causes debris to rise vertically with an initial velocity of 75 ft/sec. a. In how many seconds does it attain maximum height? b. What is the maximum height? c. What is the speed of the debris as it reaches 12 ft on the way back to the ground? d. What is the veloci...

calculus and physics
An explosion causes debris to rise vertically with an initial velocity of 75 ft/sec. a. In how many seconds does it attain maximum height? b. What is the maximum height? c. What is the speed of the debris as it reaches 12 ft on the way back to the ground? d. What is the veloci...

math
The rectangular part of her pool is 8 meters by 6 meters. The triangular part has a height of 4 meters and a base of 5 meters. what is the area of the pool cover sally will buy

Refined graines
The enriching process for refined grains adds back: a:folic acid b: thiamin & niacin c:iron d: all of the above

Whole grains and refined graines
I think it's true but not sure

Whole grains and refined graines
Whole grains or food food made from them,contain all the essential parts and naturally-occurring nutrients of the entire grain seed. True or false

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