Friday
December 9, 2016

# Posts by Ralph

Total # Posts: 102

Word problems using equations
A park is 30 meters by 24 meters. It has a path of uniform width around it. Find the width of the path if its area is one fourth that of the garden.
July 17, 2016

math
How many terms of arithmethic sequence with the common difference of 4. And the first is equal to 3 and the last term 59??
June 19, 2016

math
a snail moves along the edge of a triangular lawn ABC from A back to A . The distance AB was done 15mins, BC in 25 mins and it took the snail 40 mins to do CA. What was the average speed of the snail in centimeters per second?
May 29, 2016

physics
October 14, 2015

Physics
A parachutist bails out and freely falls 64.7 m. Then the parachute opens and thereafter she decelerates at 1.88 m/s2. She reaches the ground with a speed of 3.07 m/s. What is her average speed (in m/s) for the fall? I was planning on finding the time before she decelerated ...
June 29, 2015

Physics
A bottle with a volume of 196 U. S. fluid gallons is filled at the rate of 1.08 g/min. In years, how long does the filling take? (The density of water is 1 g/cm3 and 1 U.S. fluid gallon = 231 in3.) 196(231)/(1.08) The answer given was 1.31 years, not sure of the steps.
June 22, 2015

math
This problem is about pizza. You have a circular pizza and you want to slice it with n straight cuts into the maximum number of pieces possible (not necessarily all of the same size). Let Pn = this maximum number of pieces you can slice a pizza into with n cuts. Examples are ...
February 8, 2015

geom.
Given a triangle ABC, draw straight lines from the vertex A to n points on the opposite side BC. (None of these n points can equal B or C.) Then do the same for the vertex B, drawing n lines from B to the side AC. Into how many parts do these 2n lines divide the interior of ...
February 8, 2015

math
Below is a sequence an, for n = 0, 1, 2, ... n 0 1 2 3 4 5 6 7 8 9 an 25 25 19 25 61 145 295 529 865 1321 Use the method of finite differences to find a closed formula for this sequence.
February 8, 2015

math
Prove that it is impossible to tile an 8 × 8 checkerboard with 1 × 3 tiles
February 8, 2015

math
how do you prove this?
February 8, 2015

math
Among the integers from 1 to 10, 000, 000, 000 which are there more of: Those in which the digit 1 occurs or those in which it does not occur?
February 8, 2015

Math
I'm not april, but thanks though
January 16, 2015

Math
Connie wants to have an annuity payment of \$2,000 at the END of every three months. How much should she deposit now at 6% interest, compounded quarterly, to yield this payment for 3 years?
November 16, 2014

Math
Your bank pays 9% interest, compounded annually. Use the appropriate formula to find how much you should deposit now to yeild an annuity payment of \$800 at the END of each year, for 10 years?
November 16, 2014

Inflation Exam
\$4,382.039
November 15, 2014

math
Nilsa converted 1/12 to a repeating decimal and wrote __ 0.083 as her answer. What error did she make? ___ (Should it actually be 0.0833)
September 9, 2014

math
16. If you work 37.5 hours per week at \$10.65 per hour, how much is your gross pay for a two-week period? (Round off your answer to the nearest cent.) A. \$399.38 B. \$788.10 C. \$239.26 D. \$798.75 i think its c
May 23, 2014

physics
boobies
November 19, 2013

History of Puerto Rico
Need info in English on biographies of political and cultural leaders of Puerto Rico between 1850-1950
March 26, 2013

English
What is noun?
March 10, 2013

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, ...
March 8, 2013

physics
(1500+0.4)/(1500-0.4)]*(100000)
January 13, 2013

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?
July 19, 2012

solid mensuration
1.5sqrtof208 ft
May 12, 2012

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.
May 4, 2012

physics
no elena i believe quinton is looking for the electric field positions of Q2 and Q1 separately at different distances from each respectively
May 2, 2012

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.
April 22, 2012

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.
April 21, 2012

Intermediate Algebra
April 21, 2012

Intermediate Algebra
yes sorry i meant 3 cubed root of x^2
April 21, 2012

Intermediate Algebra
Write with rational exponents 3 square root of x^2
April 21, 2012

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
April 21, 2012

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...
January 18, 2012

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..
January 18, 2012

math
solve by substitution method: 8x-3y=-94 2x+22=y
July 24, 2011

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.
June 21, 2011

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?
June 21, 2011

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?
June 14, 2011

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...
April 20, 2011

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=?
April 20, 2011

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!
April 20, 2011

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 ...
April 20, 2011

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...
April 20, 2011

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=?
April 20, 2011

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 ...
April 20, 2011

biology
gametophyte
April 20, 2011

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 ...
April 19, 2011

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 ...
April 19, 2011

Math
thank you!
April 18, 2011

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...
April 18, 2011

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...
April 17, 2011

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...
April 16, 2011

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 ...
April 16, 2011

math
Liz has a revolving credit account at an annual percentage rate of 12%. Use the average daily balance method to find the new balance given the following statement of account.
April 8, 2011

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...
April 7, 2011

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
April 6, 2011

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)
March 23, 2011

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
March 23, 2011

science
would a screen be useful for separating a mixture of gravel and diatomaceous-earth powder?
March 22, 2011

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 ...
February 27, 2011

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?
February 23, 2011

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?
February 23, 2011

physics
thank you!
February 17, 2011

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 ...
February 17, 2011

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)
February 17, 2011

math
Above is wrong. It says 1 Letter and 6 digits. so answer is 26 * 10^6 or 26,000,000
February 14, 2011

Math
For y=f(x+2)- 3 write an equation of the asymptote to the graph. Is it y=(1/x) * (x+2)-3
December 10, 2010

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).
December 10, 2010

Calculus
-5.6 mph
December 6, 2010

computer science
how do i write a program in python for an atm machine
November 9, 2010

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.
September 9, 2010

Algebra
I have no clue here. Simplify -8[0 - (97-95)]=_________.
May 26, 2010

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
May 19, 2010

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.
May 19, 2010

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...
May 2, 2010

science
why are natural languages not suited for programming of computers?
April 20, 2010

English
a)succeeded
April 5, 2010

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 ...
April 5, 2010

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?
March 22, 2010

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?
February 15, 2010

chemistry
What is the density of UF6 (subscript) gas? What volume would 2.35 moles of this gas occupy? (Assume STP)
February 15, 2010

hrm 240
assignment: Employee Benefits memo to upper management the beefits for high school librarian
January 30, 2010

Geometry
Construct a truth table ~p^q. How do we find this if we don't know what the p or q is???
January 27, 2010

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, ...
January 26, 2010

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 ...
January 12, 2010

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?
January 11, 2010

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.
December 4, 2009

Calculus
What is the difference between f'(x), y', and dy/dx?
October 26, 2009

Economics
Goods produced by the government are called? Is it Public Goods or externalities?
October 4, 2009

college
How did you get that?
August 8, 2009

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
August 8, 2009

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 ...
September 21, 2008

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 ...
September 20, 2008

math
how do i solve the equation for x and y y+4x=27 xy+x=40
May 23, 2008

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?
April 18, 2008

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
August 28, 2007

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