Saturday

February 6, 2016
Total # Posts: 2,097

**Physics (Torque)**

Your hand holds a litter of milk while your arm is bent at the elbow in a 90 degree angle. Estimate the torque caused by the milk on your arm about the elbow joint. Indicate all numbers used in your calculations.
*February 2, 2016*

**Physics**

A jet aircraft rolls onto the end of a runway before accelerating down the runway for takeoff. At the point where the aircraft leaves the ground, it is traveling at 100 m/s. If the aircraft's initial speed when it rolled onto the runway was 10 m/s, and it accelerates for ...
*January 31, 2016*

**Math**

You have a balance of $7500 on your credit card and you make no further charges. If your APR is 12.5% and each month you make only the minimum payment of 5% of your balance, then find a formula for the balance after t monthly payments. A) 7500(0.959896) t B) 7500(0.940104) t C...
*January 30, 2016*

**Math**

In the figure, -> BD is the angle bisector of <ABC. If <ABD= 3x+2 and m<ABC=7x-6, find the degree measure of <CBD A / B--- D \ C
*January 27, 2016*

**Math**

. Question 3 options: Given g(x)=−x/4+4 and f(x)=4x+1/4 , find g^-1(x) , f^-1(x) , (g∘f)^-1(x) and (f^−1∘g^-1)(x) . What can you conclude?
*January 26, 2016*

**Math**

Suppose a ship is sailing at a rate of 35km/h parellel to a straight shoreline. The ship is 10km from shore when it passes a lighthouse at 11am. Question 6 options: a) Let k be the distance between the lighthouse and the ship. Let d be the distance from the ship has travelled ...
*January 24, 2016*

**Math**

I had this question answered before,but I'm totally confused with the answer and need a clearer answer,as I'm totally lost. This is composite functions by the way.
*January 24, 2016*

**math**

Thanks I was using it and getting 1 as the answer but since I have to plug in six more of the "p" fractions with different denominators I thought it didn't make since that for each one would be 1
*January 24, 2016*

**math**

find the sum cos^2(j) + sin^2(j), if j = p/3 -do I have to use a pythagorean identity?
*January 24, 2016*

**Math**

I do not get this question at all,this is composite functions and all my answers to a) to c) is wrong,can someone please help me with this problem :)? Suppose a ship is sailing at a rate of 35km/h parellel to a straight shoreline. The ship is 10km from shore when it passes a ...
*January 24, 2016*

**Math**

I think this is suppose to be composite function
*January 23, 2016*

**Chemisty**

how many grams of propane would be burned with 80.0g of oxygen?
*January 21, 2016*

**Math**

Determine the composite function of F(x)= sin x and g(x)=x
*January 21, 2016*

**Math**

Determine the composite function of F(x)=2^x and g(x)=3-x
*January 21, 2016*

**Chemistry**

A concentration of PCl5(g), 4,0 mol/L, it appears that the proceeding PCl5(g) => PCl3(g) + Cl2(g) is achieved with a degree of balance of 20%. In these conditions, calculate the value of chemical equilibrium
*January 20, 2016*

**i dont know how to solve this**

Which number is a solution to the inequality 3x − 2 > 10? A 2 B 3 C 4 D 5
*January 19, 2016*

**i dont know how to solve this**

A taxi charges $2.25 for a ride, plus $0.25 for every 1/4 mile. Which inequality represents how many miles, x, a person could travel with $8.00? A $2.25 + $0.25x ≥ $8.00 B $2.25 + $0.25x ≤ $8.00 C $2.25 + $1.00x ≥ $8.00 D $2.25 + $1.00x ≤ $8.00
*January 19, 2016*

**i dont know how to solve this**

What is the value of x in the equation 6 + 2/3x=9 ?
*January 19, 2016*

**how to set up this problem**

Caleb has a piece of wood that is 156 inches long. He wants to cut the wood into 2 3/4 -foot sections. How many whole 2 3/4 -foot sections can Caleb cut? A 57 B 56 C 5 D 4
*January 19, 2016*

**math please explain**

Apples cost $1.62 per pound, and bananas cost $0.48 per pound. What is the total cost for 2 1/2 pounds of apples and 1 1/3 pounds of bananas? A $4.69 B $4.55 C $3.77 D $3.36
*January 19, 2016*

**Math**

would 450 nickels be greater than 25 quarters
*January 17, 2016*

**Math**

Since I am converting 450 nickels to 25 quarters would 450 nickels be greater or less than 25 quarters
*January 17, 2016*

**Math**

So would it be: 450*0.5 and 25*0.25
*January 17, 2016*

**Math**

I am stuck on this. I am converting 450 nickels to 25 quarters to see which is greater. Can you explain or show me how to do this.?
*January 17, 2016*

**math**

Assume an 18 month CD purchased for $7000 pays an APR of 4% compounded monthly. What is the APY? 2 decimal places
*January 16, 2016*

**math**

Assume an 18 month CD purchased for $7000 pays an APR of 7% compounded monthly. What is the APY? APY = ___% Round the answer to two decimal places
*January 16, 2016*

**math**

Assume an 18 month CD purchased for $7000 pays an APR of 7% compounded monthly. What is the APY? APY = ___% Round the answer to two decimal places The previous answer was not correct so they changed the question.
*January 16, 2016*

**math**

Sorry... Assume an 18 month CD purchased for $7000 pays an APR of 7% compounded monthly. What is the APY? APY = ___% Round the answer to two decimal places
*January 16, 2016*

**math**

Can you please help me I've tried over 30 times on this problem please show me the formula that I need to come up with the answer... Assume and 18 months Ed purchased for 7000 days and APR of 5% compounded monthly. What is the APY? They want me to round the answer to two ...
*January 16, 2016*

**math**

That answer was wrong...so I reposted the new question and made sure I typed it right which was my fault.The new problem is now at 7%. They want the APY %
*January 16, 2016*

**math**

Can you please help me I've tried over 30 times on this problem please show me the formula that I need to come up with the answer... Assume and 18 months Ed purchased for 7000 days and APR of 5% compounded monthly. What is the APY? They want me to round the answer to two ...
*January 16, 2016*

**math**

Assume a 30 month CD purchased for 2000 pay simple interest at an annual rate of 5.5%. How much total interest does it turn what is the balance at maturity. They want to know the total interest and the balance at maturity and they want us to give our answer to two decimal places
*January 16, 2016*

**math**

Assume an 18-month CD purchased for $7000 pays an APR of 7% compounded monthly. What is the APY? (Fill in the blank below and round your answer to 2 decimal places.) APY = %
*January 15, 2016*

**math**

i know but it was wrong so it change %
*January 15, 2016*

**math**

Assume an 18-month CD purchased for $7000 pays an APR of 5% compounded monthly. What is the APY?
*January 15, 2016*

**math**

Assume an 18-month CD purchased for $7000 pays an APR of 3% compounded monthly. What is the APY?
*January 15, 2016*

**Maths, Function image sets**

Need a bit of help. Trying to find the image sets of two recipricol functions. The first g(x)=1/(x-2)+5 (x not equal to 2) The second g(x)=1/(x-2)+5 (x>2) Now its quite easy to draw/sketch the graph but ive not really dealt with image sets of recipricol f functions before ...
*January 14, 2016*

**English **

I have to write a rational for my English class, however I'm stuck on what to write next. The question is: What are the obstacles we face in life, and how they help us become who we are? We are supposed to both relate to real life, and a text that we read in class. I chose...
*January 14, 2016*

**Math**

1. -9p - 17 = 10 2. x over 3 - 10 = 12 3. x over 4 + 10 = 14
*January 13, 2016*

**math**

A population of 240 birds increases at a rate of 16% annually. Jemel writes an exponential function of the form f(x) =abx to represent the number of birds after x years. Which values should she use for a and b?
*January 5, 2016*

**Math**

Lila graphed the points -2 and 2 on a number line. What does the distance between these two points represent?
*January 3, 2016*

**Math**

Im wondering for this question if I'm right and going toward the right direction. Last week there was an earthquake that measured as a magnitude of 3.2 on the Richter scale. Today you hear on the radio that there was a second earthquake that was 27 times more intense than ...
*January 2, 2016*

**Math **

Rewrite the following exponential functions as logarithmic functions, and the logarithmic functions as exponential functions: f(x)=(7/8)^x b) f(x)=log12x c) f(x)=log5/9x
*January 1, 2016*

**Math**

Rewrite the following exponential functions as logarithmic functions, and the logarithmic functions as exponential functions a) f(x)=(7/8)^x b) f(x)=log12x c) f(x)=log5/9x
*December 31, 2015*

**economics**

Suppose three neighbors must vote on installation of a traffic light that costs $210. All three will share the cost of the light – that is, each person will contribute $70 to the installation. Leona values the light at $50; Lionel values the light at $50; and Theo, who ...
*December 11, 2015*

**chemistry**

You have 310. mL of a 5.75×10-5 M Pb(NO3)2 solution. How many moles of NaCl must be added to precipitate a solid? The Ksp of PbCl2 is 1.6×10-5. I'm not sure where to go after I make the ICE table
*December 2, 2015*

**Math**

water flows from a faucet at a rate of 5 liters every 25 seconds. At this rate, how much water will flow form the faucet in 45 seconds. Make a table.
*December 2, 2015*

**math**

water flows from a faucet at a rate of 5 liters every 25 seconds. At this rate, how much water will flow form the faucet in 45 seconds. Make a table.
*December 1, 2015*

**Algebra **

Steve made a business trip of 254 miles. He averaged 57 MPH for the first part and 56 MPH for the second part. If the trip took 4.5 hours, how long did he travel at each rate?
*November 25, 2015*

**Philosophy**

The following argument appeared in the draft of a bill before the Louisiana State Legislature in 2001: Whereas, the writings of Charles Darwin, the father of evolution, promoted the justification of racism, and his books On the Origin of Species and The Descent of Man ...
*November 21, 2015*

**Math**

Sally has 4.5 cups of sugar. She needs to bake brownies for for a bake sale. If each batch of brownies requires 2/3 cup of sugar, how many batches of brownies can she make?
*November 17, 2015*

**Physics**

Instead of the frictionless wheel in problem 7, imagine that the rope is tied to a frictionless pulley with radius R but an unknown moment of inertia. If the pulley always has half as much kinetic energy as the block, what must be its moment of inertia? The block has a mass m.
*November 17, 2015*

**Calc**

Gravel is being dumped from a conveyor belt at a rate of 20 {\rm ft}^3{\rm /min}. It forms a pile in the shape of a right circular cone whose base diameter and height are always the same. How fast is the height of the pile increasing when the pile is 18 ft high?
*November 16, 2015*

**Math**

Wrong answer
*November 16, 2015*

**Algebra**

Mira’s boat goes 12 mph in still water. It travels 45 miles upstream and back in a total time of 8 hr. What is the speed of the current?
*November 12, 2015*

**Algebra**

The time t required to empty a tank varies inversely as the rate R of pumping.If a pump can empty a tank in 50 min.at a rate of 650 k?L/min, how long will it take the pump to empty the tank at 500kL/min?
*November 12, 2015*

**Algebra**

A 42 ft guy wire reaches from the top of a pole to a point on the ground 15 ft. from the pole. Find how high up the pole does the guy wire reach?
*November 12, 2015*

**Interest**

Find the amount of the annuity if the deposit is $800 quarterly for 6 years at 9% compounded quarterly. Amount=?
*November 10, 2015*

**Compound interest**

The cost of the stereo is 2526.87 i just cant figure out the amount of interest paid, i do I=P*R*T and get 397.87 or something like that and it says its wrong
*November 10, 2015*

**Compound interest**

Stereo Inc. sells a stereo system for $200 down and monthly payments of $70 for the next 3 years. If the interest rate is 5.25% per year, find: a) The cost of the stereo. Answer = $ b) The total amount of interest paid
*November 10, 2015*

**Chem**

Thank you for your help.
*November 2, 2015*

**Chem**

If 0.256 g of a compound containing only carbon and hydrogen atoms is burned efficiently and 0.780 g of carbon dioxide and 0.356 g of water are produced, how many moles of H-atoms are contained in the original (0.256 g) sample?
*November 2, 2015*

**PLEASE HELP MS SUE!!!!!!!!!!!!!!!!!!!!!4**

Its Output cell
*November 2, 2015*

**Chemistry**

Two aqueous solutions, both at 25.00°C (100.0 mL of 0.223 M Pb(NO3)2 and 100.0 mL of 0.144 M Na2S), are mixed together in a calorimeter with a Ccalorimeter of 11.8 J/°C. The temperature of the solution increases by 2.40°C. Assuming that the density and heat ...
*October 28, 2015*

**Computer programming **

I am trying to write a program in C that would be used by a car rental company. This program finds the subtotal, tax amount(6%) and finally the total. The user enters in how many days the car was rented and how many miles were driven. The total is based on this logic. The cars...
*October 27, 2015*

**Math 142 (calculus)**

Determine d^2y/dx^2 for y=(5x^5+7)^4
*October 20, 2015*

**Calculus**

Find c so y=4x+3 is tangent to the curve y=x^2+c
*October 16, 2015*

**Calculus**

An open box with a capacity of 36,000 cubic inches is to be twice as long as it is wide. The material for the box is $.10/sq ft. What are the dimensions of the least expensive box? How much does it cost?
*October 16, 2015*

**Calculus**

An open box is made by cutting squares of side w inches from the four corners of a sheet of cardboard that is 24" x 32" and then folding up the sides. What should w be to maximize volume of the box? I started by trying to get a formula for the volume which I thought ...
*October 16, 2015*

**Chemistry**

@Dr.Bob222 I was answer that answer before but it was wrong
*October 12, 2015*

**Chemistry**

oh Ka is 3.5x10^-4. Sorry about that
*October 12, 2015*

**Chemistry**

What is the pH of a 0.0050 M solution of sodium fluoride? I got 7.58 for pH. Is it correct? but I try to plug in my quadratic formula, I don't get the pH 7.58. I'm really confuse. Please help.
*October 12, 2015*

**Math**

Tell if x and y show direct variation. Explain reasoning. 1) x=2y 2) y-x=6 3) xy=5
*October 7, 2015*

**Physics **

Draw a free body diagram and Apply Newton's 2nd law in both direction. 60 kg chair is pulled along a rough horizontal surface under the action of a 200N force 30 degrees up from horizontal, as shown the acceleration of the chair is 1.5 m/s^2. a) Determine the normal force ...
*October 7, 2015*

**Comma question**

Please use correct place comma for this sentence - Louisa bought mangoes and papayas and oranges.
*October 6, 2015*

**Spanish**

Thank you! that helped a lot!
*September 25, 2015*

**Spanish **

Esta mañana nos (1) _____ temprano en carro sin mapa. Al (2) _____ de la ciudad, Jorge (3) _____ al empleado de una gasolinera dónde (4) _____ el carril para acceder a la autopista. El empleado no (5) _____ contestarle porque no (6) _____ a dónde (7) _____...
*September 25, 2015*

**SPAnish **

Modifique el texto por cambiar los verbos italizados de lo familiar (informal) a lo formal Prepara (1) _____ para salir de viaje el lunes por la mañana. Para ello, haz (2) ______ las maletas, sal (3) _____ de la habitación y métete (4) _____ en el coche. ...
*September 25, 2015*

**probability **

The National Center for Educational Statistics reported that in 2009 the ACT college placement and admission examination were normally distributed and had a mean of 21.1 and standard deviation of 5.1. A college requires applicants to have an ACT score in the top 20% of all ...
*September 21, 2015*

**AP Physics I**

A placekicker is about to kick a field goal. The ball is 26.6 m from the goal post. The ball is kicked with an initial velocity of 19.0 m/s at an angle θ above the ground. Between what two angles, θ1 and θ2, will the ball clear the 2.8-m-high crossbar? (Hint: ...
*September 20, 2015*

**Spanish **

1 of 15 I tried to get there on time, but there was an accident on the freeway: Yo ____(1)____ llegar a tiempo, pero ____(2)____ un accidente en la autopista. Options 1-quise or queria 2-hubo or habia Answers 1- quise 2 -habia 2 of 15 They refused to admit that you already ...
*September 19, 2015*

**probability **

You and your friend just rented a car for an 8,000 mile cross-country road trip. Your rental car may be one of three different types: new (N), nearly one year old (O), and old (L). If the car you receive is brand new, it will break down with probability 0.08. If the car is ...
*September 11, 2015*

**Physics. Help Please**

Gabriele enters an east-w straight bike path at the 3.0-km mark and rides w at a constant speed of 8.0 m/s. At the same time, Xena rides east from the1.0-km mark at a constant speed of 6.0 m/s. 1. Write function x(t) that describe the position of Gabriele as a function of time...
*September 11, 2015*

**probability **

You and your friend just rented a car for an 8,000 mile cross-country road trip. Your rental car may be one of three different types: new (N), nearly one year old (O), and old (L). If the car you receive is brand new, it will break down with probability 0.08. If the car is ...
*September 10, 2015*

**SPANISH **

EL PRETÉRITO. Modifique el párrafo por cambiar los verbos italizados al pretérito. Ejemplo: Tenemos que preguntarle al revisor. Tuvimos que preguntarle al revisor. Voy___(1)___ a coger el tren para irme de vacaciones a la sierra. Ya no me queda___(2)___ ...
*September 10, 2015*

**probability **

You and your friend just rented a car for an 8,000 mile cross-country road trip. Your rental car may be one of three different types: new (N), nearly one year old (O), and old (L). If the car you receive is brand new, it will break down with probability 0.08. If the car is ...
*September 9, 2015*

**math**

An executive drove from home at an average speed of 45 mph to an airport where a helicopter was waiting. The executive boarded the helicopter and flew to the corporate offices at an average speed of 120 mph. The entire distance was 250 miles; the entire trip took three hours. ...
*September 9, 2015*

**math**

The weight of a bag of bricks plus 20% of its weight is 30 pounds. How much does the bag of bricks weigh, in pounds?
*September 9, 2015*

**Stats**

Explain what it means to have a deviation score of -18
*September 8, 2015*

**Statistics**

Assume that the unit of measure for each of the values in the sample is in dollars. What would be the units of measure for the sample: a) mean? b) range? C) Variance? d) Standard deviation?
*September 8, 2015*

**probability **

Alice and Bob each choose at random a number between zero and two. Consider the events events A: The magnitude of the difference of the two numbers is greater than 1/4. Event B: At least one of the numbers is greater than 1/4. Event C: Alice’s number is greater than 1/4. ...
*September 7, 2015*

**probability **

You and your friend just rented a car for an 8,000 mile cross-country road trip. Your rental car may be one of three different types: new (N), nearly one year old (O), and old (L). If the car you receive is brand new, it will break down with probability 0.08. If the car is ...
*September 7, 2015*

**probability **

Anne and Bob each have a deck of playing cards. Each flips over a randomly selected card. Assume that all pairs of cards are equally likely to be drawn. Determine the following probabilities: (1) The probability that at least one card is an ace, (2) the probability that the ...
*September 7, 2015*

**World Geography**

if 1/2 inch equals to ten miles how many inches are there in thirity miles ?
*September 2, 2015*

**Algebra**

Write 3 different algebraic expressions that uses x,y, and z and simplifies to the given value when x=-3, y=-2, and z=-1. The expression should involve only multiplication or division. Values are: 1, -16, and 12.
*September 1, 2015*

**Algebra 2 **

1. A bag contains 12 red checkers and 6 black checkers. You will randomly select two checkers, one at a time, without replacement. (a) In how many ways can you select two checkers so that at least one of the checkers is red? List the ways. (b) What is the probability that you ...
*August 26, 2015*

**math**

A plane is flying at 168 miles per hour with a heading of 43.5° from due north. The wind is blowing a constant 33 miles per hour at 133.5° from due north. Find the ground speed and true course of the plane.
*August 17, 2015*

**science**

i think its A
*August 17, 2015*

**science**

Which of the following chemicals is insoluble in water? A. C6H6 {benzene) B. HCI (hydrochloric acid) C. NH3 (ammonia) D. NaHC03 (sodium bicarbonate)
*August 17, 2015*

**Sophia**

650ft/117.3ft/s=5.5 Is NOT the answer. Nor is 40.6 nor 7.4 nor 8.8 nor 16.2 nor 6.5. Nor is 0! Thinking they didn't stop at all before the crash!
*August 12, 2015*