Friday
July 29, 2016

Posts by Alex

Total # Posts: 3,465

math
The volume of the tank is 3885 cubic centimeters. Volume is equivalent to length * width * height, in which you are provided both length and width. Your equation becomes 3885 = 18.5 * 15 * height Solving this, we get height = 14 cm.
April 14, 2016

Quadratic Equations
A quadratic equation's shape is a parabola. So anything with a curved trajectory would fit: throwing a ball / javelin / football / anything, shooting an arrow... Here's a fun picture: prntscr . com / arm214
April 13, 2016

test corrections for problems 6,11,12 and 23please
We want f(x) - g(x) and are given both equations. All you have to do is substitute: 9x^3=2x^2-5x+5 - (5x^3-7x+4) Be sure to distribute that negative sign! (I'd give you an answer but I'm not sure what that equals sign is supposed to be?)
April 13, 2016

test corrections for problems 6,11,12 and 23please
The sphere question is very similar to the cylinder question. Stick the provided value r into the provided surface area equation. SA = 4pi(2x+5)^2 Here you distribute / foil (2x+5) out when expanding, yielding 4pi(4x^2 + 20x + 25). Again, you should multiply each term by 4pi ...
April 13, 2016

test corrections for problems 6,11,12 and 23please
Oops. Add an x^2 to my previous answer. I wasn't sure why we had random x's in the problem, so I just dropped them. You're given the radius and the height of the cylinder. Simply stick in the given values into the provided formula and solve, yielding pi(80x^4 + 64x...
April 13, 2016

test corrections for problems 6,11,12 and 23please
A picture is helpful. Start by drawing the 8 by 12 lot. The field must fit in this lot and is 3 by 6. The area that is not the field is the remaining area. This is a simple area calculation. Total area of the lot is 8 * 12 minus the area of the field, 3 * 6. The remaining area...
April 13, 2016

Math
Yes, 76%.
April 13, 2016

Integers
From the problem statement, we know that some 6 integers must sum to 171. To get an idea of what these numbers are, start by dividing 171 by 6. This yields 28.5, which is what the average of our numbers are. Here we can construct numbers close to this interval-- the problem ...
April 12, 2016

Maxima and minima Application
This is a parabola, so it can either open upwards and have a min but not a max or open downwards and have a max but not a min. From the sign of the leading term (+1), we know this opens up. The minimum position of this parabola would be the point of symmetry. To find this, we ...
April 12, 2016

math
From the prompt, we know that: a) L = W + 2 b) Perimeter = 28 = 2L + 2W Where I call breadth W The easiest way to solve this system is by substitution. Plug in (a)'s value of L into b, yielding 28 = 2(W+2) + 2W. From here, isolate and solve for W. You should get W = 6cm. ...
April 12, 2016

Math
1) Picture the equation. It must decrease at an unknown rate, then flatten out as it nears 60K (asymptote). This would be in the family of functions of 1/x because 1/x is the most common function to have asymptotes, which Google seems to call power / reciprocal / rational / ...
April 12, 2016

Math
175 / 625 = 28% (What kind of party lasts 6 hours?)
April 12, 2016

Math
Only a dilation would change the shape's dimensions-- any type of shift would simply relocate the shape. We must only prove that dilation do not change the concurrency. Dilations, by definition scale on object-- if you dilate it by 2, the second image will be exactly twice...
April 12, 2016

Science
A - True. B - False. ATP -> ADP releases energy. C - False. ADP -> ATP represents storing energy. (Also you can't "break down" ADP into ATP.) D - False. Glucose and ADP / ATP can both store energy.
April 12, 2016

physics
A) This is a conservation of energy problem, so E(i) = E(f). I'll pick our point of origin to be the spring's equilibrium height-- this makes the gravitational potential energy of the ball easy to calculate. We now identify what types of energy are present at the ...
April 12, 2016

Math
Start by calculating the area of the desk. Area of a rectangle is base x height, 5.5 * 3.5 = 19.25 ft^2. Now calculate the area of the tile: .5 * .5 = .25 ft^2. To figure out how many tiles can fit, divide the area of the desk by the area of one tile: 19.25 / .25 = 77 tiles.
April 12, 2016

math polynomials
I'm assuming you're solving for x? Set each term in parentheses equal to 0, yielding: ~ 3x + 4 = 0 ~ x - 2 = 0 Now isolate x and solve. For the first equation, this would be subtracting 4 from both sides, then dividing by three. x = -4/3, 2
April 12, 2016

PHYSICS Momentum!! Collision HELP
Your assumption is correct. If you simply choose initial to be "before the collision," a) P(iA) = 0.202 * 2 P(iB) = 0 b) KE(iA) = .5 * .202 * (2)^2 KE(iB) = 0
April 12, 2016

Linear Algebra
p1, p2, p3 are elements of P_2 p1(x)= 1+x-2*x^2 p2(x)= 2+3x-x^2 p3(x)= 3+5x-x^2 Is S = {p1, p2, p3} linearly independent?
April 10, 2016

math
Take natural log of both sides. therefore ln(15)=ln(2^x) move x to the front ln(15)=x*ln(2) move ln(2) to the other side therfore x=ln(15)/ln(2) write all this down on paper to see it properly.
April 10, 2016

Algebra
A basketball player makes 53 points on 24 shots. How many 3 pointers and 2 pointers did he shoot. Show your work. I know that the answer is 5 for the 3 pointers and 19 2 pointers but I don't know how to show it.
April 7, 2016

Science
PLEASE HELP 1. Katie is bowling. She starts with the ball in her right hand and her arm as far back as it will go. She swings the ball forward, applying a force of 78 Newtons the whole time. When her hand has traveled through a path of 0.9 meters, she releases the ball, and it...
April 4, 2016

Chemistry
What is the pH of the solution when 50.00 mL of 0.250 M HNO3, nitric acid, has been treated with 25.00 mL of 0.400 M NaOH? Below is the work I performed, however, my professor deemed the [H3O] as incorrect. Where did I go wrong? [NaOH] = .025 L x 0.400 M = .010 mol [HNO3] = ....
March 30, 2016

Derulo
13 more than the product of M & 5
March 29, 2016

Check my answers for world history please!
Good
March 29, 2016

The 5th Wave
Yes yes and yes
March 29, 2016

math
All of these answers are wrong, the real answer is 9 because: 36*0.2(20%)=7.2, this is how much water the berries obtain. Now you do 7.2 divided by 0.8 which equals 9 -you do this step to find out how much water and the rest of the stuff in the berries. By the way i'm in ...
March 27, 2016

math
Marcela 27 donuts from Dunkin Donuts. She ate one ninth of the donuts. She took the remaining donuts and shared them equally amongst 12 classmates. How many donuts did each friend receive?
March 21, 2016

math
Marcela 527 donuts from Dunkin Donuts. She ate one ninth of the donuts. She took the remaining donuts and shared them equally amongst 12 classmates. How many donuts did each friend receive?
March 21, 2016

math
Alex bought 27 donuts from Dunkin Donuts. He ate 1/9 of the doughnuts. He took the remaining donuts and share them equally amongst 12 classmates. How many donuts did each friend receive?
March 21, 2016

Math
A hospital was out of juice at the end of September. They bought 200 cases on October 1 at $10/each and 200 more cases on November 1 at $12. There were 100 cases left at the end of October. What is the total of the first case expensed on November 2nd?
March 18, 2016

Math
A hospital was out of juice at the end of September. They bought 200 cases on October 1 at $10/each and 200 more cases on November 1 at $12. There were 100 cases left at the end of October. What is the total of the first scare expensed on November 2nd?
March 18, 2016

Physics
A body of mass 10g oscillates with Simple Harmonic Motion of amplitude 4cm and time period 0.50s. Calculate: a) The maximum acceleration. b) The maximum kinetic energy.
March 13, 2016

Spanish
2)descanso 3)retirarse 4)madrileños
March 12, 2016

intro to physic fundamentals
the speed of a roller coaster that had descended 29.0 m was only slightly greater when it had an initial speed of 5.00 m/s than when it started from rest. This implies that ΔPE KEi. Confirm this statement by taking the ratio of ΔPE to KEi. (Note that mass cancels.)
March 4, 2016

phliosophy( justifying using the rule of inference
1.) A > B 2.) B > C 3.) ~C.D //:. ~A
March 2, 2016

trigonometry (Course and Bearing)
how do you sketch this kind of problem?, thats the reason why i'm having trouble with this ..
March 2, 2016

trigonometry (Course and Bearing)
two lighthouses are situated such that B is 7 km directly east of lighthouse A. A ship at point P observes that A is due north and that the bearing of B is 46°10'. How far is the ship from A and B ?
March 2, 2016

Social Studies
I think so. wait to see what reed says
March 1, 2016

Social Studies
its not my social studies. it is Ann
March 1, 2016

Social Studies
The 1868 state constitution for South Carolina was revolutionary because it embodied many democratic principles absent from previous constitutions. The new document provided for population alone, rather than wealth or the combination of wealth and population, as the basis for ...
March 1, 2016

Geography and Society
Without the atmosphere that protects the Earth, humans, animals and all plant life would not be able to survive. The atmosphere works to hold oxygen in the area around the earth. Humans and most animals are dependent on oxygen. Plants are also dependent on oxygen because they ...
March 1, 2016

Math
I'm a student
March 1, 2016

Math
It is 62,370mm
March 1, 2016

Maths
OK?
March 1, 2016

Maths
A proportion is a name we give to a statement that two ratios are equal. It can be written in two ways: •two equal fractions, or, •using a colon, a:b = c:d When two ratios are equal, then the cross products of the ratios are equal. That is, for the proportion, a:b = ...
March 1, 2016

Maths
Explain how to do the problems?
March 1, 2016

Math
Muesli can make 260 grams with the dried fruit and wheat flakes. Problem 1 Answer
March 1, 2016

Math
A bakery sells apple pies for $12 each and pumpkin pies for $15 each. In one day, they make $100 from selling apple and pumpkin pies. Write an equation to show how apple pies a and pumpkin pies p are related to money the bakery made.
March 1, 2016

Chemistry (stoichiometry)
22 moles of benzene are completely reacted with molecular oxygen, how many moles of carbon dioxide will be produced? and if 150 grams of water were produced, how many moles of oxygen must have reacted
March 1, 2016

philosophy( symbloic logic)
P, Q, R = 1 x, Y, Z = 0 _____ 1) ~(x.y) V (R.Q)
March 1, 2016

Math
You save half of the money from your paycheck plus an extra six dollars to buy a new bike. Write an expression for the amount of money you save from each paycheck
February 23, 2016

Mayh
The height of a ball thrown straight up from the ground into the air at time 't', is given by: h=8t-10t^2 What is the time to go up and fall to ground
February 23, 2016

English
Which sentence contains an indirect object? a. The radio warned us of the storm. b. The police gave everyone three hours to evacuate. c. Carl remained at home on the island. d. He escaped the storm in a boat.
February 23, 2016

oblique triangle
C = 38.667, b = 9.72, c = 11.8
February 22, 2016

oblique triangle
C = 20.83, A = 103.167, c = 132
February 22, 2016

oblique triangle
reiny, am i doing it right ?? AB = 12.57(sin 54.23)/sin 57.36 = 12.11
February 22, 2016

oblique triangle
reiny am i dooing it right ?? AB = 12.57(sin 54.23)/sin 57.36 = 12.11
February 22, 2016

oblique triangle
B = 68°24'36", C = 54°13'48", b = 12.57
February 22, 2016

Discrete Math
Let A = {x ∈ R| cos x ∈ Z}, B = {x ∈ R| sin x ∈ Z}. Is A ⊆ B? Is B ⊆ A? Is either A or B a proper subset of the where other?
February 22, 2016

chemistry
If a solution containing 22.34 g of mercury(II) perchlorate is allowed to react completely with a solution containing 6.256 g of sodium sulfate, how many grams of solid precipitate will be formed?
February 14, 2016

Math
156-127=29
February 12, 2016

trigonometry (Trig Equation)
sin 3x=-1
February 12, 2016

trigonometry (Trig Equation)
4 cos 2x + 3 cos x = 1
February 11, 2016

Math
For these problems the instructions say to tell whether each scale reduces, enlarges, or preserves the size of the actual object. Here are my problems and answers: 1. 10 cm: 1 dm Ans: reduces 2. 3 ft:3 yd enlarges 3. 5 km: 5 m enlarges 4. 1760 yd: 5280 ft reduces
February 7, 2016

Physics
Roxanne is making a strawberry milkshake in her blender. A tiny, 0.005-kg strawberry is rapidly spun around the inside of the container with a speed of 14.0 m/s, held by a centripetal force of 10.0 Newtons. What is the radius of the blender at this location?
February 4, 2016

Math
5) Write an equation in point-slope form with the given: (5,-8),(5,8) 8) Write an equation in slope-intercept form for a line that passes through the point (2,-5) and is parallel to y = 11 : )
February 2, 2016

Math
correct, A
January 29, 2016

physics
A 1200kg car moves along a horizontal road at speed v0=23.3m/s,the road is wet, so the static friction coefficient between the road and the tires is only µs=0.209 and the kinetic friction coefficient is even lower µk=0.1463. The acceleration due to gravity is 9.8m/...
January 25, 2016

math
During a windstorm, part of the top of a flagpole breaks off. The broken top portion touches the ground at an angle of [c]5 deg 1[e] feet from its base (Note: if [e]=6, then 1[e]=16, and if [c]=3, then [c]5°=35°). how tall was the pole before the windstorm
January 24, 2016

chemistry
does it take time for oxygen and hydrogen to mix beucase of the room temperature?
January 24, 2016

chemistry
why is there no pop of pure oxygen and pure hydrogen?
January 24, 2016

Geology
(Magnetic inclination vs. latitude graph). Two igneous rocks crystallized at different times at the same geographic location on a continent. One rock crystallized at 120 Ma and records a magnetic inclination of 68 degrees; the second rock crystallized at 65 Ma and records a ...
January 22, 2016

chemistry
thanks bob
January 22, 2016

chemistry
what would be the name for these compounds? K3PO4? It's not Tripotassium phosphate. HCL? its not Hydrogen chloride.
January 22, 2016

trigonometry
tan3θ = 3tanθ - tan^3θ/ 1-3tan^2θ
January 21, 2016

Pre Calc
Find the vaule of sec(theta) for angle theta in standard position if the point at (3,-1) lies on its terminal side.
January 18, 2016

Math
Shadontay is going to the movies with two friends he buys a small popcorn that cost $2 the tickets and 1 popcorn cause a total $29 how much does one ticket cost
January 18, 2016

Chemistry
If a solution has a large Kb value, will it have a high pH?
January 17, 2016

geometry
thanks
January 16, 2016

geometry
how can i convert radians to degrees?
January 16, 2016

math
The perimeter of an equilateral triangle is 33.6 cm. How long is one side?
January 15, 2016

math
A jet flies at an altitude of 52,800 feet. What is the height of the jet in miles?
January 14, 2016

Science
Thank you
January 13, 2016

Science
which of the following is an example of a cyclic behavior that is seasonal? a. running from predators b. searching for water c. hunting at night d. migrating for warmth** I think its d
January 13, 2016

Physics
The rear window in a car is approximately a rectangle, 1.31 m wide and 0.390 m high. The inside rear-view mirror is 0.440 m from the driver's eyes, and 1.42 m from the rear window. What is the minimum height of the rear-view mirror if the driver is to be able to see the ...
January 8, 2016

algebra
i am trying to find the function equation knowing what x and y are. table: x | 0 | 9 | 8 | -3 | 2 | -5 | 20 f(x) | -1 | 4 | 4 | 2 | 9 | 8 | 0 problems: a. f(-3) b. f(20) c. If f(x) = 9, what is x? d. if f(x) - 4, what is x? these are some of the problems and i need to find an ...
January 5, 2016

Math geometry
An architect is designing an A-frame cottage for a resort. A cross section of the cottage is an isosceles triangle. The front wall of the cottage must accommodate a sliding door. Knowing that the architect is allowed a rectangular space of 240 m³ in volume to build inside...
December 28, 2015

Math
8x - 3x = 15 //Combine like terms 5x = 15 //Divide both sides by 5 to get x on one side 5x / 5 = 15 / 5 x = 3 //Test 8(3) - 3(3) = 15 24 - 9 = 15
December 20, 2015

math app
A salmon can swim 20 feet/sec downstream in a river. The salmon swims upstream at a rate of 6 feet/sec. Find the speed of the current. How do I set up the equation?
December 16, 2015

American History
Political parties are a principal means by which the people’s will is made known to the government and government is held accountable to the people. Briefly describe party functions that achieve these goals.
December 15, 2015

American History
Many people think that political parties make the will of the people known to government. They also argue that political parties hold the government accountable to the people. Think about what political parties do. Briefly describe how political parties keep government ...
December 15, 2015

Language Arts
Ok the ones I am not sure about are 2,3, 6, 7. Sorry I picked 4 its just I am confused about those
December 11, 2015

Language Arts
1. Which sentence contains an opinion? (1 point) Thomas Jefferson supported American independence from Great Britain. He was a lawyer in his home state of Virginia. Jefferson authored the Declaration of Independence, the most important document in history.•• He ...
December 11, 2015

trigonometry
Solution of problem:from the top of a building 55 ft high, the angle of elevation of the top of a vertical pole is 12 degrees, At the bottom of the building, the angle of elevation of the top of the pole is 24 degrees. find the height of the pole.
December 4, 2015

Math
Fifteen Grade 2 children rode bicycle to school. Seventeen Grade 3 children rode bicycle to school. How many children in Grades 2and3 rode bicycles to school?
December 3, 2015

Pre calculus
Ok, thanks!
December 3, 2015

Pre calculus
Or d?? Actually, i think its D. Am i correct?
December 3, 2015

Pre calculus
So, C?
December 3, 2015

Pre calculus
Find the domain of the function. f(x) = sqrt 6-x A. (-∞, 6) (6, ∞) B. (-∞, sqrt6 ) (sqrt 6 , ∞) C. (-∞, sqrt6] D. (-∞, 6]
December 3, 2015

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