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Posts by Nikki

Total # Posts: 726

econmics
The %increase in price= (7-5)/5x100= 40% The %decrease in quantity=(25-15)/25 x 100= 40% Elasticity=40/40=1,unit elasticity.

Trigonometry
Would it be the same answer as the other problem?

Trigonometry
Use the half-angle identities to find all solutions on the interval [0,2pi) for the equation sin^2(x) = cos^2(x/2)

Trigonometry
Use the half-angle identities to find all solutions on the interval [0,2pi) for the equation cos^2(x) = sin^2(x/2)

Trigonometry
Show algebraically how to confirm that cos2x=cos^2x-sin^2x using the sum and difference identities

physics
if the swinging pendulum (pirate ship) swings on an arc with a radius of 10 meters, how much time does it take to swing through 5 swings?

Math
It cost your office $620 to mail 500 flyers. How much did it cost to mail each flyer?

chemistry
Na + H2O ¨ NaOH + H2 How many moles of H2 would be formed from 30 grams of Na in the following (UNBALANCED) equation?

graphs and angles
a survey about students government program at a school found that 120 students wanted an after school program and 240 students wanted durning school and 40 students wanted none, If a circle graph is made from this data, what would be the measure of the central angle for the ...

Early Childhood Literacy
Erikson's work identified:

Algebra
Haha its ok. Thanks for the help.

Algebra
Ay, my bad. Thanks :) and you mean x=5 or x=-4 right?

Algebra
Wouldn't it be x^2-20=4 since (1/4)•4x= (4x/4)? So that means it would be x^2-24=0, right? Where would I go from there?

Algebra
Solve for x: (x/4)-(5/x)=(1/4)

Psychology
What are the primary biological foundation of psychology linked to behavior?

Statistics
(53*8)+(21*6)+(26*4)= 654 654/100= 6.54 letters

Physic
A point charge q1=-8 is located at the orgin of a rectangular coordinate system. A second charge q2=6nC is located at a distance of 0.2m from the orgin on the positive x-axis, and a third charge q3=12nC is located at a distance of 0.2m on the positive y-axis. Find the ...

physics
The electric field at a distance of 0.4m from a point charge q is 20.0N/C. Find the charge “q”. Help it seems simple but I keep getting a huge number

Chemistry
3.54*10^7 g of TiCl4(g) are reacted completely. If 7.91*10^6 g of Ti(s) is actually obtained, calculate the percent yield.

physics
a weightlifter lifts a set of weights a vertical distance of 2.36. if a constant net force of 335 N is exerted on the weights how much net work is done on the weights?

Physics
A car travels the same distance at constant speed around two curves, one with twice the radius of curvature of the other. For which of these curves is the change of the velocity of the car greater? Explain.

Math
Jesse has 2 1/3 pints of soup.He makes dinner for his friends and serves 1/2 of his soup.How much did he serve?

Clac- math
a 20 foot ladder leaning up against a vertical wall begins to slip. the base of the ladder makes an acute angle with the floor. when the angle equals 60 degrees the angle is decreasing at 0.1 radians/second. find the rate at which the height of th upper end of the ladder is ...

physics
? is sigma not epsilon. Sigma represents the sum. ? is the symbol for epsilon, which represents the voltage.

Chemistry
What are the various uses of radioactivity in healthcare? What are the future trends in healthcare with respect to the use of radioactivity?

HELP12
I think it's B

HELP12
D is not correct.

HELP 7
NOT!

ENG
No this answer is correct I have the definition written down and word for word verbatim it says Connotative Definition- Made up of the set of associations implied by a word in addition to it's literal meaning.

Math
Please someone help!

Math
Billy is standing 80 feet from the base of a building. The angle of elevation to the top of the building is 35 degrees. If the distance from Billy's eyes to the ground is five feet, how tall is the building?

Algebra 1
The x intercept is 9, and the y intercept is 9. Just plug in 0 for x to get y and 0 for y to get x!

math
the sale of drawing is 1/4 in. = 12 ft. find the atual measurement

Chemistry
A robust first grader goes for swimming lessons three times a week, and he enjoys it thoroughly. During the first week of December, he develops an upper respiratory infection, starts coughing continuously, and has a high fever of 39°C. His condition remains the same even ...

Stats
You are allowed to choose four whole numbers from 1 to 10 (including 1 and 10). You can only choose each number once though. Which of the following statements is FALSE? A. The numbers 4, 5, 6, and 7 have the smallest possible standard deviation. B. The numbers 1, 2, 3, and 4 ...

geometry
To the nearest tenth, what's the distance between the points k(7,-10) and M (1,4)

math
I figured these out, thanks anyway. they are: 2 42 and 62 81 and 144

math
I am a prime number. I am less than 40. I am 1 more than a multiple of 5. What number am I? I am a 2 digit number. My ones digit is 2. My tens digit is even. I am between 30 and 70. what number am i? I think either 42 or 62. I am a square number. I am more than 50. My digits ...

math
25, I figured it out.

math
i am odd, my digits add to 7, i am a multiple of 5. what number am i?

math
christine went shopping and bought each of her six nephews a gift, either a video costing $14.95 or a Cd costing 16.88. she spent 91.63 on gifts how many videos and how many cd's did she buy

Math
two forest fire stations,P and Q are 20.0 km apart, A ranger at station Q sees a fire 15.0 km away, if the angle between line PQ and the line form P to the fire is 25 , how far to the nearest tenth of a kilometre is statin P from the fire

Math
state the primary trigonometric ratio associated with angle a p(-2,5)

health
5 to 15 minutes

Physic
A 290-N sphere 0.20 m in radius rolls without slipping 6.0 m down a ramp that is inclined at 31° with the horizontal. What is the angular speed of the sphere at the bottom of the slope if it starts from rest?

math
If a quarter circle is placed on a square target and the radius of the quarter circle is the same as the length of a side of the square, what is the probability that a dart that hits the square does not hit the quarter circle

physics
The rear window in a car is approximately a rectangle, 1.1 m wide and 0.30 m high. The inside rearview mirror is 0.45 m from the driver's eyes, and 1.45m from the rear window. Part A What is the minimum length for the rearview mirror if the driver is to be able to see the ...

Physics
You are 1.9 m tall and stand 3.3 m from a plane mirror that extends vertically upward from the floor. On the floor 1.6 m in front of the mirror is a small table, 0.75 m high. What is the minimum height the mirror must have for you to be able to see the top of the table in the ...

geometry
Hello, Can some one check my work. I just want to make sure I answered the questions correctly. Thanks, Nikki 1) Every rhombus is a parallelogram. True 2) Every parallelogram is a rectangle. False 3) Every rectangle is a square. False 4) Every square is a rectangle. True 5) ...

Chemistry
Wow....how did I NOT see that...thanks DrBob... :-)

Chemistry
In order to make 1200mL of 2.0 M of sodium hydroxide, NaOH, from 9M NaOH, how many mL of the 9M NaOH should be used?

Math
How is scientific notation used in our daily lives?

Physics
A 2 kg ball of putty moving to the right at 3m/s has a head-on inelastic collision with a 1 kg ball of putty moving to the left at 3m/s. What is the final magnitude and direction of the velocity of the stuck together balls after the collision?

Health
Thanks! The first link was very helpful. :)

Health
What is the average teen suicide rate in the state of New York, as well as the top five reasons (in order) for teen suicides there? Thanks :)

Algebra
Can anyone else help with the problems? Much appreciated :)

Algebra
Hi. I've tried doing these problems and got long decimals that don't make sense. Please help!! 1) 13x + 6=4x-4 2) (1/2)x + 8= 3x + 2 3) (n/3) + 8=n + 1 4) 2n + 3= 2n + 3 I don't know how I would find n in this one!! 5) 5x + 2(2x-1)=-16 Thanks so much for all the ...

Algebra
Thanks! That helped a lot! But now I have more questions...please see my other algebra question, as well as my health question if you can. Thanks!!

Algebra
How do I solve these equations? I was out sick a whole week :( please no direct answers. I want to know the process as well. -a=5 4/5x=20 -2/3y=-18 -x/3=18 Please note that the / are fractions. Thank you so much in advance!! :)

math
1. The cost, in millions of dollars, to remove x % of pollution in a lake modeled by

health
Write a 350- to 700-word paper in which you discuss corrections accreditation and privatization. Address the following questions: • What is corrections accreditation? How does corrections accreditation affect the professional development of corrections officers? How can ...

physics
A car travelling at a constant speed of 136 km/hr passes a tropper hidden behind a billboard. One second after the speeding car passes the billboard, the tropper sets in a chase after the car wit ha constant acceleration of 3.8 m/s^2. How far does the trooper travel before he ...

algebra
Joe has to add 2.9104 g of silver

planetary science
If I'm standing on the sun can I still see the phases of the moon

criminal juctice 230
I have been trying to write this out the best was I can with out running on on to other subject

criminal juctice 230
Prepare a 200- to 300-word response to the following questions: •What is the objective of punishment in the criminal justice system? •How does punishment apply to the overall criminal justice system? •How may punishment assist with achieving institutional ...

Calculus
Can you arrange the digits 1-9, into a 1:2 fraction ( example 1/23+4/56+7/89=1) to equal 1? Only using each number once!

College Physics
Bob has just finished climbing a sheer cliff above a beach, and wants to figure out how high he climbed. All he has to use, however, is a baseball, a stopwatch, and a friend on the ground below with a long measuring tape. Bob is a pitcher, and knows that the fastest he can ...

early childhood
The first language arts skill that children learn is:

early childhood
Preschoolers use private speech to because it's more efficient

math
what does "find each unit rate" mean???

physics
Given that the electric potential is 7.0×10^−2 V higher outside the cell than inside the cell, and that the cell membrane is 0.10 thick, calculate the work that must be done (in joules) to move one sodium ion from inside the cell to outside.

geometry
B is the midpoint of AC. FInd BC if AB=3x-4 and AC=58

Physics
You are riding on a jet ski directed at an angle upstream on a river flowing with a speed of 2.8 m/s. If your velocity relative to the ground is 8.2 m/s at an angle of 25.0° upstream, what is the speed of the jet ski relative to the water?

Math
Identify the property communituve, associaive, or distributive? m+(n+6)=(n+6)+m

Math
Identify the property. X(a-b)= ax- bx

geometry
How many degrees is the base of your scalene triangle if the left leg at 35°and the right leg is 25°?

annuaties
Sally contributed $500 every six months for fourteen years into an RRSP earning interest at 7.5% compounded semi-annually. Seven years after the last contribution Sally converted the RRSP into an RRIF which is to pay her equal quarterly payments for sixteen years. If the first...

annuaties
Mr. Strupp expects to retire in 12 years. Beginning one month after his retirement, he would like to receive $500 per month for twenty years. How much must he deposit into a fund today to be able to do so if the rate of interest on the deposit is 12% compounded monthly?

statistics
a population has mean 15 and standard deviation 5. if 68% of the values in the population are between 10 and 20, the population cannot be normal

Statistics
A statistics professor gives a test and finds that the scores are normally distributed with a mean of 25 (out of 100) and a standard deviation of 5. She plans to curve the scores in one of two ways. 1) She could add 50 points to each grade. 2) She could use the following ...

Business
1. (TCO 9, 2, 3, 7) You have worked for an electronics company for the past three years. You have been assigned the responsibility to create a workbook presenting profits and losses at the company's end of year meeting. It is critical for the workbook to include a ...

exp ofmath
13/14 + 2/9 reduce answer to lowest terms

geology
I need help finding historical disasters associated with past earthquakes

algebra
i am not sure how he got this answer his name is reiny but i need alot more help wit math so someone help me please

algebra
Solve the equation by a method of your choice: 6x2 + 5x + 1 = 0 If there are two solutions, separate the solutions by a comma.

Chemistry
2LiOH + CO2 yields Li2CO3 + H2O will the astronauts survive and how much water is made if there is 2.00 kg LiOh and expel 35kg of CO2?

geology
When astronauts brought back rock samples from the Moon, the minerals present were mostly the same as those found on Earth. Can you think of reasons why this might be so? Would you expect minerals on Mars or Venus to be the same, or at least very similar, to those on Earth?

lit
It's suppose to be incorrect that is why we have to rewrite each sentence correctly and use parallel structure.

lit
Perseverance is an obstacle that involves never giving up, maintaining a positive attitude, and the ability to trust others. how can this be written in parallel structure?

science
the moon's gravity is about one-sixth the gravity on earth. mar's gravity is about one half the gravity on earth. make a bar graph that shows your weight (95 lbs) in newtons on earth, moon, and on mars. A newton is equal to about one quarter of a pound.

English
whom

chemistry
2.50x10 to the second power mL of 0.100M NaBr

5th Grade Math
Once a month a fast food chain offers a special when a coach brings in a team. Buy 5 hamburgers and get one free. This month, a team goes in after their game. Each person had one hamburger. Each of the players had a soda @ $.50 each and shared an order of french fries ($.95 ...

Math
Once a month a fast food chain offers a special when a coach brings in a team. Buy 5 hamburgers and get one free. This month, a team goes in after their game. Each person had one hamburger. Each of the players had a soda @ $.50 each and shared an order of french fries ($.95 ...

Chemistry
How many grams of sodium azide are required to produce 31 grams of nitrogen

chemistry
what is the formula for hydrate copper(II) CHLOride Tetra-hydrate?

statistics
In prior investigations made by a local Gas and Electric Company, 65% of homeowners prefer to heat with gas instead of electricity. In a recent study of 200 homeowners 60% prefer heating with gas. In a two tailed test at a .05 level of significance can we conclude that the ...

statistics
The pew research center recently polled n=1048 u.s. drivers and found that 69% enjoyed driving their cars. In 1991 a poll reported this percent to be 79%. Using the data from this poll ,test the claim that the percent of drivers who enjoy driving their cars has declined since ...

statistics
The pew research center recently polled n=1048 u.s. drivers and found that 69% enjoyed driving their cars. In 1991 a poll reported this percent to be 79%. Using the data from this poll ,test the claim that the percent of drivers who enjoy driving their cars has declined since ...

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