# Posts by Joe

Total # Posts: 2,598

**REBUS PUZZLES**

I need help with some rebus puzzles please. T H R O U G H The letters TRUH are in Bold color. E OV RRAT D E

*March 27, 2011*

**algebra**

If the cost of a cell phone has decreased 400% during the past 10 years, does that correspond to a cost decrease of four times?

*March 24, 2011*

**Newton's 3rd Law**

How can I use Newton's 3rd law on a diver off of a diving board? Could I calculate friction against his feet?

*March 22, 2011*

**Calc. Help ASAP please**

the tuition at a college increases exponentially. the current tuition (let it be t=0) is 36,000 and in 2 years it will be 39,690. a) find a formula to predict the cost of tuition in t years. Is this right? And I'm stuck at the end. 39,690= 36,000e^(kt) 11.025=e^(kt) ln(11....

*March 22, 2011*

**science**

why is it so important to have only one set of chemical symbols in the world?

*March 20, 2011*

**science**

Is it possible to study just one atome?why?

*March 20, 2011*

**algebra**

What is the maximum number of cubes measuring 5cm on an edge that can be obtained by cutting a solid cube that measures 1 m on an edge?

*March 20, 2011*

**Calculus**

ok so apparently there's no way to express integral |f(x)|dx in standard mathematical functions... which I don't exactly buy... but ya the issue came up when I was trying to evaluate integral |x - 2|dx and apparently this is correct integral |x-2|dx = 2 - [(x-2)^2sgn(2...

*March 19, 2011*

**Calculus**

ok so apparently there's no way to express integral |f(x)|dx in standard mathematical functions... which I don't exactly buy... but ya the issue came up when I was trying to evaluate integral |x - 2|dx and apparently this is correct integral |x-2|dx = 2 - [(x-2)^2sgn(2...

*March 19, 2011*

**calculus**

use the fact that integral dy/dx dx = integral dy = y find the antiderivative and plug in e and 9 to solve for the constant... i think...

*March 19, 2011*

**physics**

How far will a car moving at 50 miles an hour travel in the time it takes to sneeze?

*March 17, 2011*

**math**

how do i solve this problem? -4n+5m-2-6n+4-3m

*March 15, 2011*

**physics**

A child in a boat throws a 6.00 kg package out horizontally with a speed of 12.0 m/s, Fig. 7-28. Calculate the velocity of the boat immediately after, assuming it was initially at rest. The mass of the child is 25.0 kg and that of the boat is 50.0 kg. Magnitude ___m/sDirection

*March 13, 2011*

**Word problem solving with graph equation**

Assignment Part I: A system of equations can result in 3 possibilities: consistent, inconsistent, and dependent. Discuss each of these types of solution that can be generated, and describe the graph of each possibility. Part II: Break-Even Analysis and Cost Analysis: As a ...

*March 13, 2011*

**calculas**

If sin theta equals two third and zero degrees less than theta less than 90 degrees find cosine theta

*March 12, 2011*

**algebra**

The constraints don't show when I cut and paste so I will type them out, sorry! 0 less than or equal to x less than or equal to 10, 0 greater than or equal to y greater than or equal to 5 and 3x + 2y less than or equal to 6

*March 9, 2011*

**algebra**

Find the maximum value of the objective function z=24x+7y subject to the following constraints: 1. 0¡Üx¡Ü10, 0¡Üy¡Ü5. 3x + 2y ¡Ý 6

*March 9, 2011*

**physics**

A 8.00 kg shell at rest explodes into two fragments, one with a mass of 2.00 kg and the other with a mass of 6.00 kg. If the heavier fragment gains 130 J of kinetic energy from the explosion, how much kinetic energy does the lighter one gain?

*March 8, 2011*

**computer fun**

My sister has no websites to go to for fun.She is 10 so what do you suggest?

*March 6, 2011*

**math**

during a special promotion, each customer who makes a purchase is given a coupon for a discount of either 10,20, 30,40, or 50 percent. if a customer has an equal chance of receiving any one of the 5 types of discount coupons,what is the probability that the first customer will...

*March 6, 2011*

**Physics**

A spiral spring is compressed so as to add U units of potential energy to it. When this spring is instead stretched two-thirds of the distance it was compressed, its remaining potential energy in the same units will be a. 2U/3 b. 4U/9 c. U/3 d. U/9

*March 5, 2011*

**Physics**

Two lumps of clay having equal masses and speeds, but traveling in opposite directions, collide and stick together. Which of the following statements about this system of lumps must be true? A. The momentum of the system is conserved during the collision. B. The kinetic energy...

*March 5, 2011*

**Physics**

A glider airplane is coasting horizontally when a very heavy object suddenly falls out of it. As a result of dropping this object, the glider's speed will a. increase. b. decrease. c. remain the same as it was.

*March 5, 2011*

**Physics**

Cart A, of mass 3.00 kg, approaches and collides with cart B, which has a mass of 7.00 kg and is initially at rest. When the springs have reached their maximum compression, a. cart A has come to rest relative to the ground. b. both carts have the same velocity. c. both carts ...

*March 5, 2011*

**Physics**

A proton with a speed of 4.20×104 km/s makes an elastic head-on collision with a stationary carbon nucleus. We can look up the masses of both particles. Which of the following quantities can be calculated from only the known information? A. The velocity of the proton and...

*March 5, 2011*

**Physics**

You drop an egg from rest with no air resistance. As it falls, a. only its momentum is conserved. b. only its kinetic energy is conserved. c. both its momentum and its mechanical energy are conserved. d. its mechanical energy is conserved, but its momentum is not conserved

*March 5, 2011*

**Physics**

A heavy rifle initially at rest fires a light bullet. Which of the following statements about these objects is true? A. The bullet and rifle both gain the same magnitude of momentum. B. The bullet and rifle are both acted upon by the same average force during the firing. C. ...

*March 5, 2011*

**Physics**

Which of the following statements is true for an elastic collision? A. Both momentum and kinetic energy are conserved. B. Momentum is conserved, but kinetic energy is not conserved. C. Kinetic energy is conserved, but momentum is not conserved. D. The amount of momentum lost ...

*March 5, 2011*

**physics**

Which of the following statements is true for an inelastic collision? A. Both momentum and kinetic energy are conserved. B. Momentum is conserved, but kinetic energy is not conserved. C. Kinetic energy is conserved, but momentum is not conserved. D. The amount of momentum lost...

*March 5, 2011*

**physics**

Two carts, one twice as heavy as the other, are at rest on a horizontal frictionless track. A person pushes each cart with the same force for 4.00 s. If the magnitude of the momentum of the lighter cart after the push is P, the magnitude of the momentum of the heavier cart is ...

*March 5, 2011*

**Physics**

Two carts, one twice as heavy as the other, are at rest on a horizontal frictionless track. A person pushes each cart with the same force for 6.00 s. If the kinetic energy of the lighter cart after the push is K, the kinetic energy of the heavier cart is A. 1/4 K B. 1/2 K C. K...

*March 5, 2011*

**chemistry**

calculate the mass of water produced when 3 g HCL reacts with excess sodium carbonate

*March 3, 2011*

**trig**

y=sin pie divied by 2 theta

*March 2, 2011*

**chemistry**

A pair of students performs an experiment in which they collect 27 g CaO from the decomposition of 41 g CaCO3. Are these results reasonable? Explain your answer using percentage yield.

*March 1, 2011*

**Government**

Do you think that governors should have significant powers? I know there are about 14 states, Texas being one that their governor has very little power. But why should these governors be allowed more?

*February 26, 2011*

**math**

I have $6400 to invest at 8% and 6%. What amount is to be invested at 8% in order to earn double the interest of 6%

*February 24, 2011*

**Math**

Fred says "To find 6x8,I can use the facts for 5x4 and 1x4." Do you agree? Explain.

*February 24, 2011*

**math**

What multiplication fact can be found by using the arrays for 2x9 and 5x9?

*February 24, 2011*

**math**

it is $385 and they each had $165 left

*February 24, 2011*

**math**

plain and simple it is $385 they each had $165 left over

*February 24, 2011*

**science**

I need help doing examples for newton's 3 laws of motion....can you help me?

*February 23, 2011*

**math**

Explain how you can break apart 3x9 to help you multiply.

*February 22, 2011*

**math**

Explain how you can break apart 3times 9 to help you multiply.

*February 22, 2011*

**reading**

List 10 words that end in -ship and mean 1.quality of or state of, 2.or rank of

*February 19, 2011*

**algebra**

10 2002, 2112, 2222,2332,2442,2552,2662,2772,2882,2992

*February 19, 2011*

**reading**

What is the use of telomerase?

*February 19, 2011*

**math**

thanks alot

*February 16, 2011*

**math**

help me

*February 16, 2011*

**math**

-4-(4)=

*February 16, 2011*

**maths**

there are 8 doors behind each door is a number each number is less than 20 no 2 numbers are the same they add up to 93 what are the numbers

*February 16, 2011*

**math**

Is 8.5 greater then , less then or equal to -1000? 8.5__-1000 (<,>,=) PLEASE HELP ME

*February 15, 2011*

**math**

11520

*February 14, 2011*

**math**

Stacy multiplied 5x9 and said the answer was 44. What two patterns could you use to show that the answer is not correct?

*February 13, 2011*

**Math**

Is 30 a multiple of 5? How do you know?

*February 13, 2011*

**Math**

Shawna thinks that 8x2=17. What number pattern shows that she is not correct?

*February 13, 2011*

**math**

Jay is 150 cm tall. He can reach 55 cm above his head. A ball is thrown 268 cm in the air. How many centimeters must Jay jump to cathch it?

*February 13, 2011*

**Math**

if you ride your bike 23 kilometers in 1.5 hours,wht is your average speed?

*February 10, 2011*

**com170**

Write five sentences about the role of education in successful financial planning in the spaces on the following page. Correctly use a different verb tense in each sentence. Highlight each verb in yellow and identify the tense in parentheses.

*February 10, 2011*

**Math**

Which fraction is equal to 1/5? A.2/10 B.3/10 C.1/15 D.2/15 Can you show me the steps?

*February 9, 2011*

**Physics help on the TI-84 calculator**

(3*2nd+8)/(5.4*2nd+14)

*February 8, 2011*

**math**

can you explain how you got the answer?

*February 2, 2011*

**math**

a farmer wants to build a rectangular pen using a side of a barn and 60ft of fence. find the dimensions and area of the largest such pen

*February 2, 2011*

**Math**

A change purse contains an equal number of pennies, nickels, and dimes. The total value of the coins is 112 cents. How many coins of each type does the purse contain?

*February 1, 2011*

**science**

a)why do chemist prefer to read/ record the absorbance, rather that the percent transmittance, of light when analyzing a sample having a visible color? b) three parameters affect the absorbance of a sample. Which one is the focus of this experiment?

*January 31, 2011*

**Physics**

A 100-Watt light bulb plugged into a 120-Volt outlet is left on for 60 seconds. How much energy (in Joules) is used up by the bulb during this time?

*January 30, 2011*

**Math**

4(2x+1)-29=3(2x-5) I need help

*January 30, 2011*

**math**

Chloe used 30 toothpicks as edges to make a model for a prism. How many sides did the base of her prism have? How many vertices?

*January 30, 2011*

**math**

peer has $4.20 in dimes and quarters. He has 21 coins. How many coins of each kind does he have?

*January 30, 2011*

**math**

4TIMES9OVER30-KOVER16

*January 30, 2011*

**Algebra**

I think I figured it out. x=3 y=5 z=-1

*January 27, 2011*

**Algebra**

Solve the system: 3x-y+z=3 -x+y+2z=0 -5x+3y+2z=-2 x= y= z=

*January 27, 2011*

**Physics**

0.490 mol of argon gas is admitted to an evacuated 50.0 cm^3 container at 60.0 C. The gas then undergoes an isochoric heating to a temperature of 400 C. What is the pressure?

*January 26, 2011*

**math**

how do you find out the perimeter and the area of a parollelogram in a short cu way in a centimeter grid paper?

*January 26, 2011*

**physics**

A light bulb is wired in series with a 133-Ω resistor, and they are connected across a 120-V source. The power delivered to the light bulb is 22.5 W. What are the two possible resistances of the light bulb?

*January 25, 2011*

**math- check me**

Find the slope of the line graphed below. Points are (-4,-1) and (4,3) Is the slope 4/8 ?

*January 24, 2011*

**Math**

It was P(x)=2x^3-5x^2-9 I got 0 and x-3 is a factor

*January 24, 2011*

**Math**

Use the Factor Theorem to determine whether x-3 is a factor of P(x)=2x^3-5x^-9 . Specifically, evaluate P at the proper value, and then determine whether x-3 is a factor. P(_)=__ also pick which one applies x-3 is not a factor of P(x) x-3 is a factor of P(x)

*January 24, 2011*

**Math**

Simplify. Please help me fractions hate me:) (1/25-1/x^2)divided by (1/5+1/x)

*January 24, 2011*

**physical science**

What is the mass of a 10.0 cm3 cube of copper?

*January 22, 2011*

**physical science**

How many hours are required for a radio signal from a space probe near the dwarf planet Pluto, 6.00 x 10 (to the 9th) km away, to reach Earth? Assume that the radio signal travels at the speed of light, 3.00 10 (to the 8th) m/s.

*January 22, 2011*

**physics**

The car's displacement 0.7 s after leaving the dock has a magnitude of 14.0 m. What is the car's speed at the instant it drives off the edge of the dock?

*January 21, 2011*

**physics**

HELP!You are handed a 8.0 cm stack of new one-dollar bills. Assume the thickness of a dollar bill is 1.4 times thicker than your textbook paper (textbook paper = 63 um). (that's "micrometers") How many dollars are in your stack?

*January 20, 2011*

**physics**

Imagine for a moment that treble sounds could travel at 400 m/s, but bass sounds at only 200 m/s. If sound behaved that way, and you were listening to the CU band in Folsom stadium from a distance of 110 m, how much delay would you hear between the trumpet and tuba notes when ...

*January 20, 2011*

**physiscs**

A spherical balloon has an area of 7.1076 m2.How to you calculate the volume?

*January 20, 2011*

**physics**

Is the equation 344+0.6x(t-20)? I'm not getting this at all? How long does it take for sound to arrive at the back of a big auditorium if the temperature is 33 oC and the stage is 29 m away? answer in seconds

*January 20, 2011*

**Medical & Billing**

Can any one let me know how long it will take to complete Medical & billing certificate i am doing from Penn Foster and i am doing 4th assignement & 4 moths are over,it really sucks with projects kindly help me with ur comments what should i do continue or quit ?

*January 19, 2011*

**physics**

there's a typo. it should be R+h not R=h. my bad.

*January 19, 2011*

**physics**

What is the speed of a communications satellite orbiting the Moon at an altitude of 290 km above the Moon’s surface? I know that G=6.67e-11 and h=290. I plugged inthese values, 7.35e24 for the mass and 1.738e6 for the radius into v=sqrtGM/R=h but I didn't get the ...

*January 19, 2011*

**Business**

Would it be better to pay off a $1000 loan at 4% over 15 years or at 10% over five years ?

*January 17, 2011*

**physics**

A novice golfer on the green takes three strokes to sink the ball. The successive displacements are 4.00m north, 2.00m northeast, and 1.00m at 30.0 degrees west of south starting at the same initial point, an golfer could make the hole in what single displacement?

*January 17, 2011*

**math**

whch division sentence will give an answer that is not in equal groups? 26/4 35/7 42/6 or 45/5

*January 13, 2011*

**economics**

You have the following data. A monopolist produces 1000 units of output per month, and sells it at the price of 10 each. You know that the monopolist does not do any price discrimination, and you also know that the price-cost margin of this firm (P-MC)/P is evaluated at 0.2. ...

*January 13, 2011*

**geometry**

if the measure of angle A = 70 degrees & the measure of angle B = 25 degrees, find the measure for angle C in the traingle of ABC

*January 12, 2011*

**Physics**

Tarzan (m = 75 kg) tries to cross a river by swinging from a 15.0 m long vine. His speed at the bottom of the swing, just as he clears the water, is 9.0 m/s. What is the total force Tarzan exerts on the vine at that point?

*January 10, 2011*

**Physics**

Fnet = ma 6.5 = 3.3a 6.5/3.3 = a 1.97 = a

*January 10, 2011*

**4th math**

Sammy ate 3/8 of a pizza, and Betty ate 1/8 of the same pizza. What fraction of the pizza did Sammy and Betty eat?

*January 3, 2011*