# 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.

**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??

**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?

**physics**

show me the answer

**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 ...

**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.

**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 ...

**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 ...

**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.

**math**

Prove that it is impossible to tile an 8 × 8 checkerboard with 1 × 3 tiles

**math**

how do you prove this?

**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?

**Math**

I'm not april, but thanks though

**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?

**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?

**Inflation Exam**

$4,382.039

**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)

**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

**physics**

boobies

**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, ...

**physics**

(1500+0.4)/(1500-0.4)]*(100000)

**physics**

13

**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?

**solid mensuration**

1.5sqrtof208 ft

**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 ...

**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 ...

**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 ...

**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 ...

**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**

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.

**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 ...

**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 ...

**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 ...

**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 ...

**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 ...

**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