# Posts by betty

Total # Posts: 392

**physics 2**

A simple pendulum is 8.00 m long. (a) What is the period of small oscillations for this pendulum if it is located in an elevator accelerating upward at 3.00 m/s2? (b) What is the period of small oscillations for this pendulum if it is located in an elevator accelerating ...

**chemistry**

Write a comlete, balanced chemical equation for the reaction that occurs between aqueous iron(II) sulfate,FeSO4, and aqueous potassium hydroxide

**science**

I need help constructing a graph showing and predicting when two toy cars traveling at different speeds when the fast car can pass the slower car.The fast car traveled 1.5 meters in .87 sec.and .94 sec and .97 sec in three trials. The slow car traveled 1.5 meters in 1.1 sec ...

**Science**

Predict when a fast toy car can pass a slower toy car . I marked off a distant of 1.5 meters and recorded the time it took the cars to reach the finish line. How do I create a graph and make a prediction? The fast car times were .87 sec. ,.94 sec. ,and .97 sec. the slow car ...

**physics**

What changed Newton's original work on the movement of the Moon around the Earth into the law of universal gravitation? 1) his conclusion that the same laws applied to all objects, no matter how small 2) his connection of gravitation to his first law 3) his connection of ...

**Chemistry**

Thanks DrBob222 I got it!

**Chemistry**

Identify the precipitate(s) of the reaction that occurs when a silver nitrate solution is mixed with a sodium chloride solution. Check all that apply. silver nitrate sodium chloride sodium nitrate silver chloride

**physics**

What two facts did Newton need to be able to calculate the acceleration of the Moon? 1) the distance to the Moon and the diameter of the Moon. 2)the time it takes the Moon to make one revolution and the distance from the Earth to the sun. 3)the diameter of the Moon and the ...

**Chemistry**

What two facts did Newton need to be able to calculate the acceleration of the Moon?

**physics**

In these figures, we see a boy named Billy riding a carnival ride called the Rotor and the free-body diagram for the forces acting on him. What must be the magnitudes of the vectors (f)wall,Billy and (W)Earth,Billy if Billy remains at the same height along the wall? 1) The ...

**math**

A popular snack food reduced the amount of sodium in one serving from 700 milligrams to 480 milligrams. What is the percent decrease in the amount of sodium in this snack?

**math**

You flip a coin and you roll a number cube. What is the probability that you flip heads and roll a number less than 3?

**Life Orientation**

Are individuals empowered and do they understand their human rights or when their rights/the rights of others are being violated.Provide five reasons for your analysis and standpoint

**college algebra**

QUESTION 21 Condense the expression to the logarithm of a single quantity. ln310 + ln3x ln3(10 - x) ln310/x ln3(10 + x) ln310x ln310x

**college algebra**

QUESTION 25 The populations (in thousands) of Pittsburgh, Pennsylvania from 2000 through 2007 can be modele by where t represents the year, with t = 0 corresponding to 2000. Use the model to find the population in the year 2001. 2,418,774 2,419,774 2,421,774 2,420,774 2,422,774

**college algebra**

QUESTION 14 The game commission introduces 100 deer into newly acquired state game lands. The population N of the herd is modeled by where t is the time in years. Find the populations when t=40. (Round your answer to the nearest whole number.) 1,442 deer 1,632 deer 1,594 deer ...

**insurance**

of 500 employees a firm 280 have a life insurance policy, 400 have a medical insurance cover and 200 participate in both programmes. what is the probability that a randomly selected employee will be a participant in at least one of the two programs (ii) determine the ...

**math help please**

a plane intersects a square pyramid perpendicular to its base but not through a vertex.The plane forms a cross section what is the shape of the cross section a)trapezoid b)triangle c)square d)rectangle

**math**

15 quarters, 30 dimes, 34 nickels, 68 pennies

**math help please**

a plane intersects a right rectangle prism perpendicular to its base .The plane forms cross section.What is the shape of the cross section? a)parallelogram,that is not a rectangle b)triangle,that is not equilateral c)trapezoid d)rectangle

**math**

a square pyramid is cut perpendicular to its base and through the vertex.What two-dimensional figure is formed by the cross section ? a)parallellogram b)rectangle c)square d)triangle

**math**

Find the height of the tree 27feet and 14feet what is the height of the tree to the nearest tenth

**Chemistry**

I need major help with balancing redox reactions. I can't seem to get this one: (in basic conditions) NBr_3(aq)=> N_2(g) + Br^-(aq) + HOBr(aq) I don't know how to split this up properly, and when I do it is like impossible to balance it. Thanks!

**Math**

I actually didn't lose the 1, if you look at my final answer.

**Math**

integrate (x^2+8)/(x^2-5x+6) by partial fractions method. I first did long division, and came up with 1+((5x+2)/(x^2-5x+6)). Then I did partial fraction for (5x+2)/(x^2-5x+6) by going A/(x-3)+B/(x-2) and I got 17/(x-3)-12/(x-2) to take the integral of. But when I check online ...

**math**

integrate dydx=(4sqrt(y)lnx)/x. Check my answer? I got y=((2ln^2(x)+c)/2)^2. Is that right?

**Math**

integrate dy/dx=x(y^(1/2))(cos^2(y^(1/2))^2) I know I need to separate, and Iv'e moved dx to the right side with dy on the left. Don't know how to go on.

**Trig Identities**

Why does cos^2(x)= 1/2cos(2x)+1/2? I am trying to integrate, but the answer key says to first rewrite the expression like the above. I don't get how to change cos^2(x) into that. Explain?

**Antidifferentiation**

In addition, could I also get help with this substitution question? (y^3+6y^2+12y+8)(y^2+4y+4)dy I have no idea. I made the first expression into u, derived it, plugged it back in to get 1/3|integration|(u)du. I don't know how to go on from here.

**Antidifferentiation**

1. A stone is tossed upward with a velocity of 8m/s from the edge of a cliff 63 m high. How long will it take the stone to hit the ground at the foot of the cliff? Using antidifferentiation method, I got dv=-9.8dt. The I integrated and got v+constant1=-9.8t+constant2. Then ...

**Math**

use newton's method to estimate all real solutions of the equation x^3. I am having trouble coming up with a good guess. I went with x1=1, but that doesn't seem to be working. Any thoughts on which number should be the best first guess?

**Math**

The base of a pyramid-shaped tank is a square with sides of length 12 feet, and the vertex of the pyramid is 10 feet above the base. The tank is filled to a depth of 4 feet, and water is flowing into the tank at the rate of 2 cubic feet per minute. Find the rate of change of ...

**Calc**

my function is xe^(-x).

**Calc**

The figure shows the graph of f(x)=xe^x, x greater than or equal to 0. figure: f(x) curve is drawn and under the max. point/ concave down curve there is an inscribed rectangle. with width from a(left) to b(right) and height up to a certain point of f(x). Let a > 0 and b >...

**Math**

1. f(x)=x^2(e^x) find a point where the tangent is horizontal. The answer is apparently (-2, 4/e^2). But I got 0 when I solved for the derivative. I don't get this. 2. What value of x does the function f(x)=(x^3+27)^(1/2) have vertical tangents? My approach was to find ...

**math help please**

if the pre image of a figure is located at (4,2) (-3,-3)(0,8) and it is reflected in the y-axis followed by a translation of 3 units left and 6 units down where is the new image locate give vertex coordinates

**math**

if the pre image of a figure is located at (4,2) (-3,-3)(0,8) and it is reflected in the y-axis followed by a translation of 3 units left and 6 units down where is the new image locate give vertex coordinates

**math**

write a single translation in algebraic notation for the following (x,y) (x-6,y+2) followed by (x,y) (x+3,y+1)

**math**

describe a single translation that would result from moving a figure,2 units left and 1 unit down then 5 units right and six units up

**math**

describe the single transformation that would be equivalent to a reflection over the y-axis followed by a reflection over the x-axis

**Math**

Find quadratic regressive equation for the following f' points; (x, f'(x)): (-4,74); (-3,39); -2,10; -1,-6; 0,-14; 1,-12; 2,0; 3,22; 4,55 It's something really complicated, and I'm later asked to find the original equation, which is a cubic function. Any idea ...

**Math**

1. 1. A police cruiser approaching a right-angled intersection from the north, is chasing a speeding car that has turned the corner and is now moving due east. When the cruiser is 0:6 miles north of the intersection and the car is 0:8 miles to the east, the police determine ...

**Math**

Use Newtons Method to find 13^(1/4) correct to four decimal places. I know the formula X_(n+1)= X_n - [f(X_n)]/[f'(X_n)]. I am not sure how to go on from there. I made the equation into y=X^(1/4), but I can't seem to figure out how to go on. Please help? Thanks in ...

**science**

which of the following is the function of live

**accounting**

The trigger spectators aggression in sport when a referee or other official clearly rules wrongly in an action .more so if they do it again even when the rival team scoring

**chem**

solution of 0.148 M sodium iodide for an experiment in lab, using a 500 mL volumetric flask. How much solid sodium iodide should you add

**Physics**

A 100g piece of ice at 0 degrees celcius is placed into a container holding 200g of water, initially at temperature 25 degrees celcius. Heat flows from the water to the ice, cooling the water and melting the ice. Calculate a) how many moles of ice and how many moles of water ...

**Math**

Solve the equation 2/3 O= n-3m

**Algebra**

paint express charge $30 per gallon of paint plus $1.10 per square foot of wall space. color creations charges $24 per gallon of paint plus $1.20 per square foot of wall space. robert estimates he will need four gallons of paint for the rooms he'd like painted. how much ...

**Science**

I am writing a mock biotechnology research proposal for class and I don't know what I should make this research plan about. What are some of the most breaking scientific news, or diseases and issues in this field(biology preferred, or chemistry) that are currently having ...

**Math**

A function has zeros of 5 and -1. If a horizontal translation is implemented, what is the least amount of transformation for both of the zeros to be positive integers? Is zero a positive integer?

**wrighting**

Now that you're aware of the information at your disposal, describe how it will be helpful to you as you pursue your college degree

**math homework**

Michael went into a comic book store to pick up a few of his “much wanted” comics. There are 4 different Batman issues, 5 different Star Wars issues, and 2 different Superman issues to choose from. How many combinations are possible for Michael to pick up one issue ...

**math homework**

Michael went into a comic book store to pick up a few of his “much wanted” comics. There are about 4 different Batman issues, about 5 different Star Wars issues, and about 2 different Superman issues to choose from. Exactly how many combinations are possible for ...

**math**

Would the solution be just 40?

**math**

59280?

**Math**

What is the ninth term of the following geometric sequence? a4=27 a7=64 a9=

**Physics**

At a given instant three electrons, in vacuum, happen to lie on a straight line. The first and second are separated by 3.00x 10-6 m, while the second and third are 8.00 10-6 m apart. What is the magnitude of the net electrostatic force on the middle electron, the second one?

**math**

Standard soft drink cans hold 12 ounce or 355 milliliters of soda. Assume that soda can must be right circular cylinders. Through trial and error with cans of different sizes, find the dimensions of a 12-ounce can that has the lowest cost for materials.

**Physics**

An unstable nucleus with a mass of 18.0 ✕ 10-27 kg initially at rest disintegrates into three particles. One of the particles, of mass 4.1 ✕ 10-27 kg, moves along the positive y-axis with a speed of 8.0 ✕ 106 m/s. Another particle, of mass 7.7 ✕ 10-...

**Physics**

A 4.1 g dart is fired into a block of wood with a mass of 20.2 g. The wood block is initially at rest on a 1.2 m tall post. After the collision, the wood block and dart land 2.6 m from the base of the post. Find the initial speed of the dart.

**saftet**

I have 5 words theres 25 letters. About saftey. Etadprlbaselsspsfnniltria

**math**

if a car passes mile marker 2 in 4 hours and a mile marker 125 in 6 hours, how many miles per hour is the car traveling?

**maths lit,business studies,life science economics**

You can study paramedics or police

**trigonometry**

a surveyor 1standing on a highway observed the angle of elevation of the airplain as 22.5°. at the same time, a surveyor 2 observed the angle of elevation of the same airplane to be 30°. if the airplane was 850m directly above a point on the highway, find the distance ...

**math**

If a plant grew 1 1/4 inches in one month. If the plant grows at the same rate, how many inches will it have grown at the end of 3 1/2 months?

**finance**

the joseph company has a stock issue that pays a fixed dividend of 3.00 per share annually. Investors believe the normal rik-free rate is 4 percent and that this stock is 14 percent,and that this stock should have a risk premium of 6 percent

**math**

4.5 by 6.12 original drawing want to increase size to 18 by 24. How do I do it?

**7th grade LA**

I don't understand why sentence #7 is correct. Shouldn't it be a compound -complex. " Although it was cold and the rain was getting heavier, we decided to go fishing as planned. Dependent: Although it was cold. Independent: the rain was getting heavier indepdent: ...

**English**

measurable

**Math**

Solve the equation: 4/3y+5/2y = 1

**algebra**

Simplify and show steps: 5x^2/x^3-x^2

**Math**

How do I simplify -4(-5x-u)-2(3u-2x)

**Math**

what is -4 (-w+4x-2)?

**Math**

what is 5 - / 8 6

**Kirr**

$1200.00

**statistics**

in a positive skewed distrubtion with a mean (average) of 100 and median of 90 is What?

**Stats**

Need help finding the area under the normal curve between z = -1.0 and z = -2.0?

**chemistry**

I don't know I copied the question word for word. He wants to know what was produced and percentage changes. I'm sorry

**chemistry**

There are two different oxides of copper produced as a result of this reaction. They are copper(I) and copper(II) oxide. If copper is changed to copper(I) oxide the percentage changed in mass is 12%. If copper is changed to copper(II) oxide the percentage change in mass is 25...

**math**

3/8 of a box contains 18 crackers how many crackers are in a box

**Statistics**

If a company’s total fixed costs increased by $20,000 and its contribution margin decreased by $12,000, net income would be?

**Science**

a d a a

**math**

3x+2x+y+2y

**physics**

A 45.4 kg sign is hanging in two wires as illustrated below. If angle A is 53.5 degrees and angle B is 29.6 degrees, what is the tension in the left wire? Give your answer in newtons

**Math**

is zero

**math**

A die is tossed twice. What is the probability of obtaining 6 dots both times?

**statistics**

A lottery uses 4 urns containing chips 0 to 9. One chip is selected at random from each urn. How many sample points are in the sample space?

**algebra 2**

if a system of equations has no solution then it is what?

**fin**

As part of a new labor contract, Acme has agreed to make a one-time contribution of Euros 1,000,000 to the construction of a new physical fitness facility for its employees. This amount will be placed in an account earning E% (E = the fifth digit of SUN). When the account ...

**business**

Access: When importing and linking data, what program is used to store data and what program is used to analyze it?

**geometry**

A flagpole has a height of 10 yards. It will be supported by three cables, each of which is attached to the flagpole at a point 4 yards below the top and attached to the ground at a point that is 8 yards from the base of the pole. Find the total number of feet of cable that ...

**math**

How do I factor non-traditional math problems that contain symbols? The examples given were: $q + $8 - $~ and 7* - x* + 2*.

**anatomy**

the lungs are lateral to the heart?

**algebra**

A parallelogram is 22 inches long and 14 inches wide. How do you find the height of the parallelogram? How do you find the area of the parallelogram ?

**Algebra, HELP!**

SOLVE FOR p: 5T = 6D + 6pm

**Algebra**

Got it! Y= x(x-2)

**Algebra**

What is the rule for the function x= 4, 5, 6, 7, 8 y= 8, 15, 24, 35, 48

**medical billing**

And what is even more disturbing is that the question is "copied" directly out of the workbook.

**science**

The driver of a 850.0 kg car decides to double the speed from 23.2 m/s to 46.4 m/s. What effect would this have on the amount of work required to stop the car, that is, on the kinetic energy of the car?