Posts by JEFF

Total # Posts: 870

Math
80

Physics
The x component of vector is 5.3 units, and its y component is -2.3 units. The angle that vector makes with the +x-axis is closest to

Science Help
4. When a fan is turned on, it changes electrical energy into ______ energy. A. motion*** B. magnetic C. gravitational D. electromagnet HELP ME

PHYsics HELP
When you hold an insect at the near point of your eye it subtends an angle of 5.00 10-3 rad. Determine the angular size (magnitude only) of the insect when viewed through a microscope that has an angular magnification with a magnitude of 117.

Physics HELP
You have two containers half full with liquid 1. You then fill the two containers respectively with a layer of liquid 2 and 3. A ray of light travelling through the bottom layer (liquid 1) and into the top layer experiences total internal reflection off liquid 2 when the angle...

geography
What is the longitude of place x 8am whem the time at 0• is 12noon

physics
Two stars X and Y travel counterclockwise in circular orbits about a galaxy. The radii of their orbits are in the ratio 4:1 . At some time, they are aligned making a straight line with the center of the galaxy. Five years later, star X has rotated through 90°, By what ...

Physics HELP
A 2.0-m measuring stick of mass 0.215 kg is resting on a table. A mass of 0.500 kg is attached to the stick at a distance of 72.0 cm from the centre. Both the stick and the table surface are frictionless. The stick rotates with an angular speed of 6.50 rad/s. (a) If the stick ...

Physics HELP
In a downtown office building you notice that each of the four sections of a rotating door has a mass of 90 kg. What is the width of each section of the door if a force of 58 N applied to the outer edge of a section produces an angular acceleration of 0.500 rad/s2?

chemistry
This is easier if you draw it out. You go left to right on the carbon chain. Branches off of the main carbon chain can be indicated with a parentheses. example: propan-2-ol condensed formula can be CH3CH(OH)CH3. Dont forget the triple bond for your heptyne.

physics
teh cop car will destroy the other car because the other car is 300 pounds lighter

Science
idk

PreCalc
The fifth term of an arithmetic sequence is equal to 6 and the sum of the first 12 terms is equal to 45. Find the first term and the common difference. having trouble with this, can't figure out the steps?

ALGEBRA HELP #4
i dont get it, i need help eith The coordinate plane below represents a town. Points A through F are farms in the town. graph of coordinate plane. Point A is at 2, negative 3. Point B is at negative 3, negative 4. Point C is at negative 4, 2. Point D is at 2, 4. Point E is at ...

Literature and the arts
What was the American small town like?

Math fractions
Holly had 30 pencils. She gave 6 pencils to her friends. Three-eighths of her remaining pencils need to be sharpened. How many of Holly's pencils need to be sharpened? How to write this problem in numerical?

Fraction word problem
A structure is made out of foam cubes that are each 1/4 foot tall. The height of the structure is 8 feet. How many cubes were used to build the structure? Is this how we write 8?1/4=8

English
How to use "beneath the basement as an adjective and adverb?"

Math
Keria had a box of 58 stickers. She shared them equally between herself and five friends. How many stickers were left over?

Math
What number whose sum of its digit is 26 become 6000 when rounded to the nearest thousand? List 3 pissible answer.

Math
A number round off to 4000.the digit in the in the hundred place is twice the digits in the tens place.the sum of the digits is 12.the number uses only different digits.find the number.

Algebra 2
The value of a baseball card can be modeled by exponential decay. The value will decrease at a rate of 0.2% each yeah. The card was originally valued at $250 in the year 2000. A- Use the exponential decay formula to write an equation to model the situation. B- Use your ...

science
a scorpion stalks, kills and then eats a spider, based on its behavior what ecological term describes the scorpion? a) producer, herbivore, decomposer b)Producer, carnivore, heterotroph c)Predator, carnivore, consumer d) Predator, autotroph, herbivore

Math Check! FAST! VERY FAST PLZ!!!!!!!!!!!!!!
I believe you are correct. The first time she chooses, her chances are 2/10 that she will get an I tile. With not replacing the tile, her second chance will be 1/9. Multiply the two fractions together gives 2/90 = 1/45

Gr 12 Data
Sarah tosses 5 coins, one after the other. a) How many different outcomes are possible? b) Draw a tree diagram to illustrate the different possibilities. c) In how many ways will the first coin turn up heads and the last coin turn up tails? d) In how many ways will the second...

Maths
Given that the line y=mx+c is a tangent to the circle (x-a)^2+(y-b)^2 = r^2 show that: (1-m^2)r^2=(c-b+ma)^2 Please Help and sorry for the inconvenience

Maths
show that the circles x^2 + y^2 - 10x - 8y + 18 = 0 and x^2 + y^2 - 8x - 4y + 14 = 0 do not intersect. Please

Algebra
You will need to have two equations with two unknowns. The first equation will be for the "In six years Jill will be twice as old as Amanda." and the second equation will be for the "One year ago Jill was nine times older than Amanda." So if you use J for ...

physics
What’s the direction of the electric field caused at the point (–2, 3) by an electron located at the origin?

Calculus
At which point on the curve y = -2+2e^x is the tangent line parrellel to the line 3x-y=5? Just give the x-coordinate as an exact number

Spanish
Which would you use to say your friend is writing? estan escribiendo estoy escribiendo esta escribiendo estas escribiendo

English
Which of the following lines from a&p illustrates Dike's use of conflict?

IPC
if you throw a 0.145 kg baseball in 18 meters in 0.45 seconds, what is the magnitude of momentum of that baseball?

Pre-Calculus
586.55093555..........

Dating with Radioactivity
thanks thruthoverload is 100%%%

Calculus
Consider the function f(x) = -3x+2. Notice the limit of f(x) as x approaches 1 is -1. Find a value for delta such that is the distance x is from 1 is less than delta, then the distance from f(x) to -1 is less than 0.05

Biology
I have a question on plant science, wondering where I can get the answer..

math
Determine whether the function is symmetric with respect to the y-axis, symmetric with respect to the x-axis, symmetric with respect to the origin, or none of these. y = -6x3 + 7x

Math
Thanks!

Math
For what real values of a is x^2 + ax + 25 the square of a binomial? If you find more than one, then list your values in increasing order, separated by commas. If you could help me, that would be great!

Math
the value of a machine depreciates every year by 5% .if the present value of the machine is 100000,what is the value after 2 years

science
Aluminium sulphate when dissolved in water forms aluminium hydroxide and sulphuric acid.Since, aluminium hydroxide is insoluble in water, a clear solution is not obtained. Al2(SO4)3 + 6H2O ?2Al(OH)3 + 3H2SO4 Aluminium Aluminiumsulphate Hydroxide

Math
Find the set of all z such that neither 2+z nor 2-z is in the interval (-1,1]. Express your answer as an interval or as a union of intervals.

science
determine the velocity of the truck if it starts from rest and accelerate at 2m/s² in 3.2s

Math
Find the distance between the x-intercept and the y-intercept of the graph of the equation 5x - 12y = 60.

Math
We need to make an open topped box with a square base and fixed volume of 8 cubic feet. The material for the base costs $ 6 per square foot and the material for the side costs $4 per square foot. Write a function for the cost as a function of the length and side of the base

Math
Joe has 18 mortals all the marbles are either black or gold there are four more gold marbles and black how many black marbles are there

history
songhai

American Government
Kitten is 100%, Thank you so much I have been looking for these answers everywhere.

math
he last time Nkechi was at school was on Saturday. She was first absent for four days before that. Today is Tuesday, 27th of September. When was Nkechi first absent? Give the day and date.

astronomy
69 hahahahaha

check my work
For all of those looking for the CA for the Practice test Civics Practice: 1.D 2.C 3.B 4.A 5.A 6.B 7.A 8.A 9.D 10.A

Math
thx steve

Math
22.01

Math
my name jeff

geometery
In triangle​ ABC, the size of angle B is 55 times the size of angle​ A, and the size of angle C is 1111degrees° less than 44 times the size of angle A. Find the size of the angles.

geometery
A rectangle has a perimeter of 42 inches. The width of the rectangle is 3 inches less than 1/2 the length. What are the dimensions of this​ rectangle? Write your answer in the form​ "width, length

geometry
In triangle​ ABC, the size of angle B is 55 times the size of angle​ A, and the size of angle C is 1111degrees° less than 44 times the size of angle A. Find the size of the angles. thank you

geometry
A rectangle has a perimeter of 4242 inches. The width of the rectangle is 33 inches less than one half 1/2 the length. What are the dimensions of this​ rectangle? Write your answer in the form​ "width, length thank you

math
Wilcorp has 50 employees who work 40 hours a week and earn $20/hour. Fifteen employees each worked 4 hours of overtime at 50% above their hourly rate.

social studies HELP PLSS
...

math
There are 21 students in 6M. 12 students play football, 16 students play cricket and there are 2 students who don't play either sport. How many play both sports?

math
there are 91 students that attend mass .this represents 70% of the students. how many students at mass

Precalculus
An item costs $12.00 in 2016 through an online retailer. Each year, the price will increase by 5% of the previous year’s price. A. Find the general rule for the sequence of the prices for this item. B. Determine what the price will be in 2030. C. If you buy one of these ...

Math
At the Cafe, a lunch of iced tea, a veggie burger, and fries costs $7.56, with the fries costing twice as much as the iced tea. Next week at the Cafe, the price of the iced tea will increase 10% and the price of the veggie burger will increase 25%. After the increase, the same...

match
If a lateral line ditch will store 800 gallons of water how long will it take for one inch of water to be absorbed?

Math-Calc
f(x)=7/(ln(x^2+5)) find f'(1) Cant seem to be getting the right answer. I believe can I get help finding the derivative.... thank you

math
I like turtles

Math-probabilities
The table below shows the number of deaths in the U.S. in a year due to a variety of causes. For these questions, assume these values are not changing from year to year, and that the population of the United States is 312 million people. Cause Deaths Passenger car occupant 13,...

geometry
idk

physics
do your own homework

life orientation
advice the cyclists about the road eccidents

Chemistry
Why is the equivalence point pH of the HCl-TRIS titration = 4.6?

Chemisty
Based on the standard analytical practice during a titration of taking pH-volume measurements every 0.3 pH units, how many measurements should you take between the addition of 5mL and 7.5mL of titrant, a) in the titration of a 10mL aliquot of standard 0.1500M TRIS base (Kb=1....

math
89m

Physics
A 3.0cm diameter crankshaft that is rotating at 2500 rpm comesto a halt in 1.5 s. a- what is the tangential acceleration of a ponit on thesurface? b-how many revolutions does the crankshaft make as itstops? For this question, what are the applicable concepts and/or laws and ...

science
chicken

Math
Determine the most probable next term in the following list of numbers. 1, 7, 1, 1, 7, 1, 1, 1, 7, 1, 1, 1, 1, 7, 1, 1, 1, 1 The most probable next term is______

Physics
A wire is made of a material with a resistivity of 2.08184 × 10−8 Ω · m . It has length 4.42917 m and diameter 0.6763 mm . What is the resistance of the wire? Answer in units of Ω. Would you just use the equation R = PL /a?

Math
17

Math
jk xd

Math
yo ur diek is as big as ur ego--> c=8 ^ Life size

CHEMISTRY HELP
If a/b = 10.23, what is a and what is b?

statistics
rounded to the nearest thousandth .193

CHEMISTRY
Hi DrBob222, can you explain what you mean by "Solve the two equation simultaneously for a and b. I get something like 2 for acid and 23 for base." I don't know how you got that and what you started with. Thanks!

CHEMISTRY
1. What is 5/60? 2. How did you get 10.3 for b/a?

CHEMISTRY
Calculate the amount (in mL) of 1.520M NaOH that is required to add the following acetic acid solution to prepare a buffer with the corresponding pH: 30.00mL of a 5.00% (w/v%) acetic acid; the resulting acetate buffer has a pH of 5.75. pKa of acetic acid = 4.74

physics
A disc has a mass of 340kg, and is mounted to a frictionless axle and is free to rotate around it. Model the shape of the disc as a hollow shaft on axis where the inner and outer diameters are 600mm and 1200mm respectively. A wire is wrapped around the disk, and is the pulled ...

Physics
An arrow is shot from a height of 1.5 m toward a cliff of height . It is shot with a velocity of 30 m/s at an angle of 60 deg above the horizontal. It lands on the top edge of the cliff 4.0 s later. (a) What is the height of the cliff? (b) What is the maximum height reached by...

Algebra
Im to write a function,that showsthe total cost of b(x) to rent a car driven (x)miles

Physics
A gun is fired vertically into a 1.60 kg block of wood at rest directly above it. If the bullet has a mass of 21.0 g and a speed of 195 m/s, how high will the block rise into the air after the bullet becomes embedded in it?

math
how to break down 2 1/3-1 3/4

Physics
A 0.500 kg object is thrown vertically upward with an average applied force of 8.20 N by a student. The force is applied through a displacement of 1.50m. a. What is the average net force acting on the object? b. What is the velocity of the object when it leaves the student'...

Math
Yes, you are correct. 1 gal is 4 qts, so 300 gals = 1200 qts. So 600 qts is 50% of 1200 qts.

probability
There are 4 white socks and 4 black socks. You randomly divides socks into pairs. What is the probability that each pair consists of 2 socks of the same colour? Express answer as a fraction. I'm not really sure how to start this question.

math
Umm... Aren't you supposed to show the work cause I ain't see any good work.

probability
A jar has 25 red, 15 blue and 10 green marbles. Drawing 3 marbles all at once what is the probability of drawing 2 red and 1 blue? 2 red? Not sure if this is right. For the fist problem I multiplied (25/50)*(24/49)*(15/48)=.0765 and for the next problem I multiply (25/50)*(24/...

probability
A jar has 25 red, 15 blue and 10 green marbles. Drawing 3 marbles all at once what is the probability of drawing 2 red and 1 blue? 2 red? Not sure if this is right. For the fist problem I multiplied (25/50)*(24/49)*(15/48)=.0765 and for the next problem I multiply (25/50)*(24/...

College Physics
How much energy is required to bring 10.0 grams of ice at -5.00 degrees to 105-degree steam? Assume the system is isolated so that no mass is lost to the surroundings

chem
what are ways to increase the solubility of SnF2 at constant temperature and pressure. I think adding a strong acid will work not sure what else.

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