# Posts by tina

Total # Posts: 1,258

math
f a stone is tossed from the top of a 330 meter building, the height of the stone as a function of time is given by h(t) = -9.8t2 – 10t + 330, where t is in seconds, and height is in meters. After how many seconds will the stone hit the ground? Round to the nearest ...

precalculus
find the component f and g so that fog =H H(x)=log3 e^x

recalus
find the component f and d , so that fog =H H(x)=log-3 e^x

college math
1500.00

chem
Im not sure how to go about this: Calculate the number of gramms in 0.65 mole of aluminum carbonate?

Physics
Your teacher tosses a basketball. The ball gets through the hoop (lucky shot). Height of hoop= 3.048m height of person= 2.342 m the ball is thrown at 17 m/s at an angle of 46 degress Part 1: How long does it take the ball to reach its max height? Part 2: How long does it take ...

Physics
To win the game, a place kicker must kick a football from a point 20 m (21.872 yd) from the goal, amd the ball must clear the crossbar, which is 3.05 m high, When kicked, the ball leaves the ground with a speed of 16 m/s at an angle of 58.1 degrees from the horizontal. The ...

algebra

Chemistry 105
How many mL of O2 will form from 55.2g KClO3?

Math
If you had a fraction strip folded into twelfths, what fractional lengths could you measure with the strip? b. How is your answer in part (a) related to the factors of 12?

Math
7x+6=9x 6=2x x=3 Sam made 7x which is 21 Wilbur made 9x which is 27

math 10
(2^2)^3 you would multiply the exponents so that 2^6 which is 64

Intermediate Algebra
f(0)=-10 y-intercept is (0,-10) f(x)=0=5x-10 10=5x x=2 x-intercept is (2,0)

Calculus
find the limit as x approaches zero of (3sin2x)/sin7x and show work

Algebra 1
first put it in slope intercept form 5x+6y=-12 6y=-5x-12 y=(-5/6)x-2 so: f(x)=(-5/6)x-2

Algebra 1
just change y to f(x) y=2x f(x)=2x

Physics
You buy a plastic dart gun, and being a clever physics student you decide to do a quick calculation to find its maximum horizontal range. You shoot the gun straight up, and it takes 3.8 s for the dart to land back at the barrel. What is the maximum horizontal range of your gun?

Physics
An Olympic long jumper is capable of jumping 8.3 m. Assume that his horizontal speed is 9.5 m/s as he leaves the ground. He was in the air for .87 seconds. How high does he go assuming that he lands upright, the same way he was when he left the ground?

Physics
At what projection angle will the range of a projectile equal to 5 times its maximum height?

MBA Practice problems
you are presently involved with a project to establish the cost of the gold presently used in the production of 1000 computer chips per month. each chip uses two grams of 20 ct gold with the remaining portion of a metal whose cost is insignificant. what is the monthly cost of ...

physics
A ball thrown horizontally at 22.3 m/s from the roof of a building lands 31.0 m from the base of the building. How high is the building?

physics
Two boxes of masses 21.6 kg and 28.2 kg sit on a smooth, frictionless surface. The boxes are in contact, and a horizontal force of 68.2 pushes horizontally against the smaller box. What is the acceleration of the two boxes?

Physics
A tether ball of mass 0.25 kg is attached to a vertical pole by a cord 1.4 m long. Assume the cord attaches to the center of the ball. The cord makes an angle of 20° with the vertical. (a) What is the tension in the cord? (b) What is the speed of the ball?

Astronomy/Physics
I cannot calculate the gravitational force between these two objects. I am confused. Jupiter (R=800 million km, M = 2 x 10 to the 27th power kg and a 100 kg person on earth. Please help!

physics
calculate horizontal force that must be applied to 1kg to make 6ounce to make it accelerat on horizontal friction three hour table dropped with same acceleration it would have if it and feel freely

Statisics
35%of adult Americans are regular voters. A random sample of 250 adults in a medium-size college town were surveyed, and it was found that 110 were regular voters. Estimate the true proportion of regular voters with 90% confidence and comment on your results... Can you show ...

Physics
is force and normal force the same thing? if not what is the difference. for instancee if a problem said given a force of 20 newtons. would normal force be 20 newtons? please answer !!!!!!!!!

statistics
A random sample of state gasoline taxes in cents is shown here for 12 states. Use the data to estimate the true population mean gasoline tax with 90% confidence. Does you interval contain the national average of 44.7 cents? 38.4 40.9 67 32.5 51.5 43.4 38 43.4 50.7 35.4 39.3 41.4

English (Urgent)
I think it sounds great...:))) Keep up the good work!!

Physics
what equation would I use to find the magnitude of the mass's velocity?

Physics
how do you find the magnitude of the mass's velocity?

Physics
A mass of 18 kg is being pushed up a frictionless incline with a constant force of 20 Newtons directed parallel to the incline, up the incline. At the top of the incline the mass is moving at 23 m/s up the incline. If the angle of inclination is 58 degrees and the height (not ...

calculus
Find constants a and b in the function f(x)=ax^b/(ln(x)) such that f(19)=1 and the function has a local minimum at x=19. What is a and b?

Physics
A mass of 11 kg is placed on a frictionless incline which is inclined at an angle of 69 degrees above the horizontal. It is held in place by a rope which is attached to a wall at the top of the incline. The rope is angled 13 degrees above the direction parallel to the incline...

Physics
A mass of 8 kg lies on a horizontal, frictionless floor. A force of 72 Newtons pushes to the left (negative x direction) with a force of 72 Newtons. Another force of unknown magnitude pushes the mass in a direction of 21.4 degrees above the positive x axis. The mass is ...

Physics
A mass of 5.6 kg lies at the top of a frictionless incline. It is inclined at an angle such that the normal force on the mass is 30 Newtons. If the length of the incline is 58 meters and the mass is originally at rest at the top of the incline and then released, how long does ...

Physics
A mass of 5.6 kg lies at the top of a frictionless incline. It is inclined at an angle such that the normal force on the mass is 30 Newtons. If the length of the incline is 58 meters and the mass is originally at rest at the top of the incline and then released, how long does ...

Physics
A mass of 18 kg is being pushed up a frictionless incline with a constant force of 20 Newtons directed parallel to the incline, up the incline. At the top of the incline the mass is moving at 23 m/s up the incline. If the angle of inclination is 58 degrees and the height (not ...

Physics
A mass of 5.6 kg lies at the top of a frictionless incline. It is inclined at an angle such that the normal force on the mass is 30 Newtons. If the length of the incline is 58 meters and the mass is originally at rest at the top of the incline and then released, how long does ...

Physics
A mass of 18 kg is being pushed up a frictionless incline with a constant force of 20 Newtons directed parallel to the incline, up the incline. At the top of the incline the mass is moving at 23 m/s up the incline. If the angle of inclination is 58 degrees and the height (not ...

physics
3.5

algebra
The length of a rectangle is 3x + 4/4x^2-4 and and the width is8x − 8/6 the area of the rectangle is a)1 b)2 c)x+1/x-1 d)4 please help!

Physics 1
A mass of 18 kg is being pushed up a frictionless incline with a constant force of 20 Newtons directed parallel to the incline, up the incline. At the top of the incline the mass is moving at 23 m/s up the incline. If the angle of inclination is 58 degrees and the height (not ...

us history
why don't more textbooks have readings on blacks resisting slavery?

science
A race car travels northward on a straight, level track at a constant speed travels 0.756 km in 18.0 s. The return trip over the same track is made in 23.0 s

history
why did the europeans say the indians were uncivilized ?

chemistry
A doctor has ordered that a patient be given 11 of glucose, which is available in a concentration of 60.00 glucose/1000.0 of solution. What volume of solution should be given to the patient?

math
use the digits 0,2,4,6,8 exactly once to form a 3-digit and 2-digit NEGATIVE intfer that will give you the LEAST possible sum when the two intergers are added together.

geometry
Point M is the midpoint of line JK. If JM is 6x-7 and MK is 2x+3 what is JK?

AP Chemistry
A 21.0054 g sample of impure magnesium carbonate was heated to complete decomposition according to the equation MgCO3(s) → MgO(s) + CO2(g) . After the reaction was complete, the solid residue (consisting of MgO and the original impurities) had a mass of 19.0732 g. ...

AP Chemistry
In the reaction below, 23 g of H2S with excess O2 produced 9 g of sulfur. ? H2S + ? O2 → ? S + ? H2O . What is the percent yield of sulfur? Answer in units of %

AP Chemistry
For the reaction ? Al + ? CuSO4 ↽⇀? Al2(SO4)3+? Cu a maximum of how many moles of Al2(SO4)3 could be formed from 5.49 mol of Al and 4.09 mol of CuSO4? Answer in units of mol

Chemistry
Not sure of my answers, pls help me out. I have to indicate the kinds of intermolecular forces that occur between the solute and the solvent in which the molecule is most soluble. a) glucose b) naphthalene c) dimethyl ether d) alanine (an amino acid)

math
tom sells 15% of 180 acres to dan for 1,100 an acre .the motrgage finace fees dan must pay are 3% of the total price.how much are the fees

Writing
can someone look at my previous post?

Writing
Ms. Sue im start all over but I don't know how to start my body similaritie paragraph off.

Writing
can someone proofread my writing? Ms.Sue preferably?

Writing
Conflict? That’s the word defines me. Why? I’m always having and issue with someone and it leads to fussing back and forth at each other. In the story, “Interlopers” by Saki and in a conflict I had with my sister we had a lot of similarities and differences...

Phi103
Answers to phi 103 week 5 test

Algebra
solev the compound inequality 2x-9/8<-7 or 2x-9/8>6

Science
According to Peter Saundry there is no true universal code of ethics because standards of conduct vary from place-to-place and time to time. True or false

history

history
how did the Iberian Reconquista figure in shaping modern Europe [Europe after 1500]?

Real Estate Law
For the most part, mortgage loans are made by __________ institutions. (Points: 5) a. lending b. personal c. private 4. government I think its A

history
what factors enabled the Europeans to quickly assert their hegemony over indigenous peoples in the Americas and to compel Eastern potentates to yield to European commercial demands or to accept Western political control?

history
What factors led Atlantic community states to seek ways to access Asian markets by avoiding the Mediterranean late in the 15th and early in the 16th-centuries?

Chemistry
A gas at a temperature of 95 degrees C occupies a volume of 159 mL. Assuming constant pressure, determine the volume at 15 degrees C.

phi 103
a weak inductive argument

statistics
Suppose the following summary statistics are obtained from a large group of individuals:X =52.0, Sx= 8.7, Y =147.3, Sy = 16.9. Dorothy receives an Xscore of 52. What is her predicted Y score if r = o?

English

English
2.run-on sentence correction: That brand of car goes very fast; which is why many people want them. 3.verb tense Grammar quizzes can be tough. There is a lot to learn, and remember. I find that it gets easier with practice. 4.subject verb agreement Can I call you back? I am ...

English
Each of the follwing sentences need to be re-written so they are grammatically correct, also they each have one grammaitical error such as subject-verb agrrement, run on sentence, verb form and tense or sentence fragment. please help 1. The bank robber escaped from the bank. ...

English
Can you tell me the grammatical error on the following sentences eg:subject-verb agrrement, run on sentence, verb form and tense, or sentence fragment. Also These sentences need to be re-written. 1. They is both happy. 2. at 3PM I will be feeding the ducks. At the park.. 3. ...

Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get an answer, so confused...

Math
Suppose you invest your money into an account that pays 4.0% per year compounded quarterly. How long (in years) will it take for your money to triple? Round your answer to one decimal place. I know I use this... A=P(1+r/n)^nt But to go from there and get an answer, so confused...

Physics
Why is there a centripetal acceleration if the velocity does not increase? a. Velocity changes direction as you move around the circle, causing a Δv b. Velocity in a circle is always constant c. Because gravity will hold any object in a circular motion I am almost sure ...

physics
What are some examples of real resistors used in circuits?

mechanics
what is the kinetic energy of an object that has a mass of 20nkilograms and a speed of 2.8 m/s

Physics
Question: When a balloon is rubbed with fur, it becomes negatively charged. Explain why?

Math
A person standing near the edge of a cliff 120 feet above a lake throws a rock upward with an initial speed of 40 feet per second. The height of the rock above the lake at the bottom of the cliff is a function of time and is described by the function H(t) = –16t2 + 40t + ...

chemistry
How could I determine if one rock is denser than another rock?

physics
A ray of light enters the top of a glass of water at an angle of 36 degrees with the vertical. What is the angle between the refracted ray and vertical? The answer is 26 degrees but I keep getting 22 degrees. I used snell's law: n1sinθ1=n2sinθ2 for n1 I thought ...

Physics
A string with a linear density of 0.035 kg/m and a mass of 0.014 kg is clamped at both ends. Under what tension in the string will it have a fundamental frequency of 100 Hz? The correct answer is 270N but I don't know how to get there. Here are some of the equations we can...

CHEMISTRY
Analyze the properties of a sodium atom and a sodium ion. What are the differences in mass, stability, and reactivity that are caused due to the differences between the sodium atom and sodium ion?

Med terms
Andrea is not 100% right. left lower lobe = lower left lobe (LLL)

Physics
Question: Two strings at different lengths and linear densities are joined together. They are stretched so that the tension in each string is 190.0 N. The free ends are fixed in place. Find the lowest frequency that permits standing waves in both strings with a node at the ...

Physics
1. A person driving to the right and honks their horn. An observer standing behind the car, opposite its direction of motion would hear...(choose one) a. Higher Pitch b. Lower Pitch c. Same pitch as the driver please explain how you got to the answer

economics
At an initial point on the aggregate demand curve, the price level is 100, and real to GDP is \$15trillion. After the price level rises to 110, however, there is an upward movement along the aggregate demand curve, and real GDP declines to \$14 trillion. If total autonomous ...

economics
Suppose that Congress enacts a lump-sum tax cut of \$750 billion. The marginal propensity to consume is equal to .075. Assuming that Ricardian equivalence holds true, what is the effect on equilibrium real GDP? On saving?

math
How did you get that answer? I can't come up with the equations, I got them but I didn't get that answer

math
A manufacturer makes two products A and B, each of which is processed in two departments, production and finishing. Each A takes 3 hours to produce and six hours to finish, whereas each B takes 5 hours to produce and 2 hours to finish. How many units of A and B can be produced...

Micoreconomics
In recent years, the Internet auction firm eBay has sougth to make its auction technology the favorite of software programmers, and it has begun licensing its technology to other Web sites. The company's managers have pulicly stated that their goal is for eBay's ...

Physics
I need a complete list all the doppler effect equations for a beginner physics class. Here is a sample questions so you know the level Question: Two trains on separate tracks move toward one another. Train #1 has a speed of 130 km/hr and train #2 a speed of 90km/hr. Train 2 ...

MATH
10(10)+ 5(10)

Algebra
Can you help me solve this please? 31%=1-600/Q Answer: 869.6 But in don't know how to get to the answer

Physics
1. Water with a mass of 2kg is held at constant volume in a pressure cooker. 10,000 J of energy is added from the heater inside the pressure cooker. The container is not terribly well insulated, so the container leaks 2000 J of energy to the surrounding air. What is the total ...

algebra
Determine whether 14 is a solution of the equation 6(x - 2)= 70

Physics
1. How much energy is required to be removed to lower the temperature of a bottle of drinking water (280mL) from 22°C to 4°C? The density of water is 1.0g/mL here are the equations we can use: (-m1)(C1)(ΔT1)=(m2)(C2)(ΔT2) Q=mcΔT Q=mL There might be ...

chemistry
A traveling wave is produced on a rope. The wave travels until it hits a wall and it is reflected. If the speed of the wave is 1.8 m/s and it takes 3.3 s to get back to the starting point, how long (m) is the rope.

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