Saturday
April 19, 2014

Posts by ralph


Total # Posts: 79

History of Puerto Rico
Need info in English on biographies of political and cultural leaders of Puerto Rico between 1850-1950

English
What is noun?

summarize
Decision making is a process by which several possibilities are considered and prioritized, resulting in a clear choice of one option over others. Decision making is a fact of life personally and in business. We make dozens of decisions each day. Some decisions are simple, whi...

physics
A decorative piece consists of a 20cm long uniform brass rod weighing 4N and two ornaments, one weighing 6N and one weighing 10N, fixed to the ends. At what point should a supporting chain be attached so that the ornament balances?

Geometry
ABCD is a parallelogram with angle B= 120, angle C= 60, angle D= 2x+5y, and angle A= 4x+y. Find the values of x and y. Check your solution, only an algebraic solution will be accepted.

physics
no elena i believe quinton is looking for the electric field positions of Q2 and Q1 separately at different distances from each respectively

Intermediate Algebra
If a projectile is fired straight upward from the ground with an inital speed of 96 feet per second, then its height (h) in feet after t seconds is given by the equation h(t)=-16t^2+96t Find the maximum height of the projectile.

Intermediate Algebra
The function h(t)=-16t^2+100t+300 gives the height in feet of a projectile fired from the top of a building in t seconds. A) When will the object reach a height of 350 feet? Round answer to one decimal place. B) Explain why part A has two answers.

Intermediate Algebra
Write with radical notation y^4/5

Intermediate Algebra
yes sorry i meant 3 cubed root of x^2

Intermediate Algebra
Write with rational exponents 3 square root of x^2

Intermediate Algebra
If the discriminant of a quadratic equation has the given value, determine the number and type of solutions of the equation. A.48 B.0

english
I have to identify the use of the infinitive in the following sentences. Infinitives begins with the word, to.... The 1st sentence is Am I too late to volunteer. The infinitive in that sentence is to volunteer. So, I have to identify the use of the infinitive to volunteer as a...

English
I need help identifying the use of the infinitive by writing noun, adjective or adverb. 1. Am I too late to volunteer? To volunteer. 2. If you enjoy mysteries, Agatha Christie's Witness for the Prosecution is a good play to read. To read..

math
solve by substitution method: 8x-3y=-94 2x+22=y

physics
Yes it is .005 s. And you assume right it is 0.145 kg. I am sorry of not putting in the units. I am really struggling with Physics.

physics
As a baseball is being caught, its speed goes from 30 to 0 m/s in about 0.005 its mass is 0.145. A) What is the baseballs acceleration in m/s^2 and in g's? B) What is the size of force acting on it?

Physics
A train, initially stationary, has a constant acceleration of 0.5 m/s Squared. A) what is its speed of 15 s? B) What would be the total time it would take to reach a speed of 25 m/s?

Math3
a) A young man measuring 1.89 m. walks at a velocity of 1m/s towards a lamppost which its light is at 4m from the ground. At what velocity does the young man's shadow decrease when he's 10 m away from the lamppost? b) A young girl, standing at the edge of a dock, pulls...

Math2
We pour water into a conical container of a radius of 10 cm with a height of 36cm at a rate of 70 cm^3/s. At what velocity does the water level increase when it reaches 12 cm? dh/dt=?

Math
tnx, I udnerstand how to do them now, cauz I have an exam tomorrow, and I just didn';t understand the way my teacher showed me, tnx again!

Math
The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law of sin) b) What is th...

Math3
a) A young man measuring 1.89 m. walks at a velocity of 1m/s towards a lamppost which its light is at 4m from the ground. At what velocity does the young man's shadow decrease when he's 10 m away from the lamppost? b) A young girl, standing at the edge of a dock, pulls...

Math2
We pour water into a conical container of a radius of 10 cm with a height of 36cm at a rate of 70 cm^3/s. At what velocity does the water level increase when it reaches 12 cm? dh/dt=?

Math
The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law of sin) b) What is t...

biology
gametophyte

Math
The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law of sin) b) What is th...

Math
The two sides of a isosceles triangle have a fixed lenght of 14 cm. The opposite angle at the base of the triangle increases by 0.3 rad/min. a) what is the growth rate dx/dt of the base of the triangle when the opposite angle mesures 1.6 rad? (Use the law of sin) b) What is th...

Math
thank you!

Math
The radius of a disk grows at 2cm/s. Calculate the growth rate of the disks area when the radius mesures 7 cm. (Designate the area of the disk with A and the radius with r) A) Find the relation between A and r B) Find the derivative of this relation on time t dA/dt = C) When r...

Math
The radius of a disk grows at 2cm/s. Calculate the growth rate of the disks area when the radius mesures 7 cm. (Designate the area of the disk with A and the radius with r) A) Find the relation between A and r B) Find the derivative of this relation on time t dA/dt = C) When r...

Math, statistics, Linear Programming
this is what i got for problem 1. how does it look? Min Z = 0.15X1 + 0.10X2 + 0.2X3 + 0.12X4 + 0.02X5 s.t. 0.2X1 + 0.12X2 + 0X3 + 0X4 > 0.026*3 (protein) 0X1 + 0X2 + 0.42X3 + 0.36X4 > 0.137*3 (thiamine) 0X1 + 0X2 + 0.18X3 + 0.40X4 >0.143*3 (niacin) 0.06X1 + 0.05X2 + 0...

Math, statistics, Linear Programming
just looking for the constraints and variables. The Nestle’ Purina PetCare Company of St. Louis, Missouri, manufactures a gourmet cat food under the Fancy Feast brand. The brand includes a number of options for choices of meats, fish, and poultry in three ounce cans. The ...

Math
the concentration of a certain substance in our organism is given by the model Q9t) = Q(subscript 0) e^-0.1960t a) what quantity of substance is present in the organism of this individual 3 hours after ingestion? b) after how many hours will there only be 10% of this substance...

Math (logarithmic functions)
Those are the only ones I can't seem to resolve. Thank you! resolve x: 1) 9*3^0,51x = 315 2) 10*3^15x+21 =363*2^9x+51 3) log(15x^2) - log(3x) = 4*log(3) 4) log[of base 3]*(15x + 4) = 3

Math2
Given f, a derivable function and y = f (x)^3 + 40√(f(x)+12) . Knowing that f(4) = -4 and that dy/dx|x=4 = 14 , calculate f’(4)

Math
given the fonction: y=3x^2-5x and x=g(t)derivable as g(14)=-4 and g'(14)=2 calculate dy/dt in t = 14

science
would a screen be useful for separating a mixture of gravel and diatomaceous-earth powder?

managerial accounting
A fast-food establishment is thinking of buying a new cooking grill and refrigeration unit. The costs of these new machines are $12,500 and $9,000, respectively. The installation costs of the new equipment will run about $800. It is estimated that 10% more customers can be ser...

physics
We throw a ball horizontally at 10m/s. (a) after how much time does the trajectory form a 30 degree angle? (b)after how much time after the throw did the velocity double?

physics
a stuntman runs on a roof and without giving himself a vertical impetus, wants to land on another roof, 2m lower and 5m further horizontally. What is the minimal velocity he needs to run at?

physics
thank you!

physics
a police car is cruising on the right lane at 25 m/s (meters/sec.). A motorcycle, on the left lane, passes the police car at a constant 35 m/s. The police officer reacts fast and accelerates at a constant 5 m/s^2. (a)When does he catch up? (b)What was his velocity at that inst...

Calculus (pleas help I really need to check this)
a) -6 b) - 1/4 c) 1/2 = square root of t is 1/2(square root of t)

math
Above is wrong. It says 1 Letter and 6 digits. so answer is 26 * 10^6 or 26,000,000

Math
For y=f(x+2)- 3 write an equation of the asymptote to the graph. Is it y=(1/x) * (x+2)-3

Physics
Two pans of a balance are 50cm apart. If the fulcrum is displaced by 1cm what percentage is the true weight marked up? the answer i got was 1.3%, please help if wrong (which it probably is).

Calculus
-5.6 mph

computer science
how do i write a program in python for an atm machine

math problem solving organized list
tonya and lauren are designing a socce r uniform.they want to use two colorson the shirt.their choices are green,purple,orange,yellow,blue and silver.how many ways can they choose two colors.

Algebra
I have no clue here. Simplify -8[0 - (97-95)]=_________.

Chemistry
A chunk of silver has a heat capacity of 42.8 J/degrees C and a mass of 181g. Calculate the specific heat of silver. Did I do these steps right? 42.8 Joules/degrees C / 181g = .236joules

Chemistry
A chunk of silver has a heat capacity of 42.8 J/degrees C and a mass of 181g. Calculate the specific heat of silver.

Chemistry
Calculate the boiling points of freezing points of the following solutions in water. a) boiling point of a 2.25m solution of propylene glycol (a non-electrolyte) b)freezing point of a 1.0m solution of potassium iodide c)freezing point of a 1.0m solution of nickel(II) nitrate d...

science
why are natural languages not suited for programming of computers?

English
a)succeeded

Chemistry
Calculate and compare the mass of the reactants with the mass of the products for each equation. a)2KClO3 (s) ==> 2KCl(s) + 3O2 (g) b)4NH3(g) + 6NO(g) ==> 5N2(g) + 6H2O(g) c)4K(s) + O2(g) ==> 2K2O(s) Show that each balanced equation obeys the law of conservation of ma...

Chemistry
34.98

Chemistry
The combustion reaction of acetylene gas is represented by this equation: 2 C2H2(g) + 5 O2(g) ==> 4 CO2(g) + 2 H2O(g) How many grams of CO2 and grams of H2O are produced when 52.0g C2H2 burns in oxygen?

chemistry
How many moles of oxygen are there in 23.5g of H2SO4? (numbers are subscripts)How many oxygen atoms? How many grams of oxygen?

chemistry
What is the density of UF6 (subscript) gas? What volume would 2.35 moles of this gas occupy? (Assume STP)

hrm 240
assignment: Employee Benefits memo to upper management the beefits for high school librarian

Geometry
Construct a truth table ~p^q. How do we find this if we don't know what the p or q is???

Math
I need help calculating the finance charge and new balance using the previous balance method. Previous balance = $179.32 Annual rate = 16% Finance charge = $ ? New purchases = $117.42 Payments/credits = $85.00 New balance = $ ? I also need help calculating the unpaid balance, ...

math
Find the tax on a dinette with a cash price of $200 that has been reduced by 20% if the tax rate is 6.5% The taxable value of the property in the tax area is usually referred to as the ? value. 1. taxable 2. assessed Please help me with these. after these i will be done with m...

Bible Study
The fact that the Flood lasted over a year is? 1. a geological evidence for the local flood theory. 2. an evidence from Genesis for the local flood theory. 3. an objection to the local flood theory. 4. all of these. I think it is 4?

Accounting
A company incurs a cost for a part which is needed to repair a piece of equipment. Is the cost an asset or an expense? Explain.

Calculus
What is the difference between f'(x), y', and dy/dx?

math 090
9-5

Economics
Goods produced by the government are called? Is it Public Goods or externalities?

college
How did you get that?

college
Suppose you are playing a word game with seven distinct letters. How many seven letter words can there be? Hint:Think about scrabble. It is ok it the word is gibberish in this case

english
are the following sentences correct?the price of these jeans is reasonable. the quality of the candle is poor. bread and butter are our daily food. the books borrowed from the library are on my desk. the famous singer and composer have arrived. the boy who won the medals is a ...

spellings
aardvark aardwolf aasvogel abacuses abalones abampere abandons abapical abasedly abashing abatable abatises abattoir abbacies abbatial abbesses abdicate abdomens abdomina abducens abducent abducing abducted abductee abductor abegging abelmosk aberrant abetment abettals abetter...

math
how do i solve the equation for x and y y+4x=27 xy+x=40

chemistry 2
The pH of a Ba(OH)2 solution is 10.66. What is the hydroxide concentration? If the solution volume is 125ml, how many grams of Ba(OH)2 have been dissolved?

math
write an algebraic expression for each word phrase 5 more then a number divied by 9 and 3 more then the productof8 and the number

sentence
The United States is not a democracy, it is a Republic. The United States is a democracy because the people elect its leaders. democracy Can someone help me understand how to use this word in a sentence? Correction of the run-on (comma splice): ... democracy. It ... http://gra...

math
57.5

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