Saturday

January 31, 2015

January 31, 2015

Total # Posts: 289

**Physics**

A plane diving with constant speed at an angle of 52.5° with the vertical, releases a package at an altitude of 499 m. The package hits the ground 3.87 s after release. How far horizontally does the package travel?
*January 27, 2015*

**Chemistry**

Bromine is a reddish-brown liquid. Calculate its density (g/mL) if 586g of the substance occupies 188 mL.
*January 21, 2015*

**algebra**

a car rents for $45 per day plus 21 cents per mile you are on a daily budget of $66 what milage will call you to stay within your budget
*January 18, 2015*

**algebra**

A triangle has a perimeter of 112 centimeters, each of the two longer sides of the triangle is three times as long as the shortest side. Find the length of each side of the triangle
*December 11, 2014*

**algebra**

A bus was purchased for $70,000, assuming the bus depreciates at a rate of $6,000 per year(straight line depreciation) for the first 10 years, write the value v of the bus as a function of the time t (measured in years) for 0 < t < 10
*December 11, 2014*

**math**

A medical researcher wanted to determine the effect of pH (a measure of alkalinity or acidity, with pure water having a pH of 7) on the growth of a bacteria culture. The table below gives the measurements of different cultures, in thousands of bacteria, after 8 hours. pH ...
*December 6, 2014*

**disease**

________ is the most frequently reported bacterial sexually transmitted disease in the United States. A. Chlamydia B. Syphilis C. Herpes D. Gonorrhea
*November 19, 2014*

**algebra**

Q(t) = 5, if 0 ¡Ü t ¡Ü 5 −t + 7 if 5 < t ¡Ü 8 t − 1 , if 8 < t ¡Ü 11 Q(0)=__ Q(x),6< x <7=___ Q(n), 1< n <2 = ___
*October 18, 2014*

**algebra**

find the zeros of f:f(x) = 10 − 4x x= ____
*October 18, 2014*

**algebra**

A bus was purchased for $80,000. Assuming the bus depreciates at a rate of $6,000 per year (straight-line depreciation) for the first 10 years, write the value v of the bus as a function of the time t (measured in years) for 0 ¡Ü t ¡Ü 10. v(t)= ____
*October 18, 2014*

**ALGEBRA**

A(w)= sqrt. w^2 + 13, A(-c)=
*October 18, 2014*

**algebra**

A(w)= sqrt w^2+13, find A(r+1)=
*October 18, 2014*

**algebra**

A(w) = sqrt. w^2+13, find A(4)=
*October 18, 2014*

**algebra**

A boat was purchased for $45,000. Assuming the boat depreciates at a rate of $4700 per year (straight-line depreciation) for the first 8 years, write the value v of the boat as a function of the time t (measured in years) for 0 ¡Ü t ¡Ü 8. v(t) = ____, 0 &...
*October 18, 2014*

**algebra**

f(x)=|x+5|; f(a)=9 find smaller value and larger value
*October 18, 2014*

**algebra**

sqrt. w^2+13, find A(0)
*October 18, 2014*

**algebra**

g(x)=6x^2+7, find g(c+5)=
*October 18, 2014*

**algebra**

Find all points on the x-axis that are 10 units from the point (7, 6). (Hint: First write the distance formula with (7, 6) as one of the points and (x, 0) as the other point.)
*October 12, 2014*

**math**

the price of a computer fell 20% this year, if the computer now cost $850, how much did it cost last year?
*September 26, 2014*

**algebra**

a triangle has a perimeter of 126 centimeters, each of the 2 longer sides of the triangle is three times as long as the shortest side. Find the length of each side of the triangle.
*September 26, 2014*

**algebra**

The vendor of a coffee cart mixes coffee beans that cost $8 per pound with coffee beans that cost $4 per pound. How many pounds of each sould be used to make a 60-pound blend that sells for $5.25 per pound?
*September 26, 2014*

**algebra**

a motorboat left a harbor and traveled to an island at an average rate of 12 knots, the average speed on the return trip was 10 knots. If the total trip took 8.8 hours, how far is the harbor from the island?
*September 25, 2014*

**Physical Science**

A heat pump releases 103.0 kcal as it removes 54.0 kcal at the evaporator coils. How much work does this heat pump ideally accomplish? The answer should be in KJ
*September 18, 2014*

**Physicsl Science**

A heat pump releases 103.0 kcal as it removes 54.0 kcal at the evaporator coils. how much work does this heat pump ideally accomplish? Answer should be in KJ
*September 17, 2014*

**Math**

A company has determined that the profit, in dollars, it can expect from the manufacture and sale of tennis racquets is given by P = −0.01x2 + 130x − 180,000. How many racquets should the company manufacture and sell to earn a profit of $174,900?
*September 16, 2014*

**Physical Science**

Why does a glass filled with a cold beverage seem to sweat? a. saturation always results in sweat on wet object. b. the cold glass adjacent air to saturation, which is followed by condensation of water vapor. c. when cold, water molecules can move through tiny pores in the ...
*September 15, 2014*

**Physical Science**

A heat engine exhauts 122.0 kal after taking 499.0 how much mechanical work was done by the engine?
*September 15, 2014*

**still confused**

The length of a rectangle is 3 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 144 feet, what is the length? am looking for the length, not the width. Thanks I know the width is 25
*September 12, 2014*

**Still confused**

An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account? looking for the ...
*September 12, 2014*

**-Math-Desperate**

An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account? looking for the ...
*September 12, 2014*

**Correction Please**

The length of a rectangle is 3 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 144 feet, what is the length? am looking for the length, not the width. Thanks
*September 12, 2014*

**MATH**

The length of a rectangle is 3 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 144 feet, what is the length?
*September 12, 2014*

**math**

v=1/3tt^2h
*September 11, 2014*

**math**

A new machine that deposits cement for a road requires 13 hours to complete a one-half mile section of road. An older machine requires 15 hours to pave the same amount of road. After depositing cement for 2 hours, the new machine develops a mechanical problem and quits working...
*September 11, 2014*

**math**

A jeweler wants to make a silver alloy to be used to make necklaces. How many ounces of a silver alloy that costs $3.50 per ounce should be mixed with one that costs $7.00 per ounce to make a new 30-ounce alloy that costs $6.30 per ounce?
*September 11, 2014*

**math**

A plane leaves Chicago headed for Los Angeles at 520 mph. One hour later, a second plane leaves Los Angeles headed for Chicago at 620 mph. If the air route from Chicago to Los Angeles is 1800 miles, how long will it take (after the first plane takes off) for the first plane to...
*September 11, 2014*

**math**

Running at an average rate of 4 meters per second, a sprinter ran to the end of a track. The sprinter then jogged back to the starting point at an average rate of 2 meters per second. The total time for the sprint and the jog back was 2 minutes 6 seconds. Find the length of ...
*September 11, 2014*

**math**

An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account?
*September 11, 2014*

**math**

A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island?
*September 11, 2014*

**math**

The price of a computer fell 20% this year. If the computer now costs $550, how much did it cost last year
*September 10, 2014*

**math**

A = P + Prt; P (business)
*September 10, 2014*

**math**

v=1/3ni2h
*September 10, 2014*

**math**

The length of a rectangle is 3 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 144 feet, find the width and the length
*September 10, 2014*

**math**

A new machine that deposits cement for a road requires 13 hours to complete a one-half mile section of road. An older machine requires 15 hours to pave the same amount of road. After depositing cement for 2 hours, the new machine develops a mechanical problem and quits working...
*September 10, 2014*

**math**

A jeweler wants to make a silver alloy to be used to make necklaces. How many ounces of a silver alloy that costs $3.50 per ounce should be mixed with one that costs $7.00 per ounce to make a new 30-ounce alloy that costs $6.30 per ounce
*September 10, 2014*

**algebra**

A new machine that deposits cement for a road requires 13 hours to complete a one-half mile section of road. An older machine requires 15 hours to pave the same amount of road. After depositing cement for 2 hours, the new machine develops a mechanical problem and quits working...
*September 10, 2014*

**algebra**

A jeweler wants to make a silver alloy to be used to make necklaces. How many ounces of a silver alloy that costs $3.50 per ounce should be mixed with one that costs $7.00 per ounce to make a new 30-ounce alloy that costs $6.30 per ounce
*September 10, 2014*

**algebra**

The length of a rectangle is 3 feet less than twice the width of the rectangle. If the perimeter of the rectangle is 144 feet, find the width and the length
*September 10, 2014*

**algebra**

A triangle has a perimeter of 56 centimeters. Each of the two longer sides of the triangle is three times as long as the shortest side. Find the length of each side of the triangle
*September 10, 2014*

**algebra**

It costs a manufacturer $7.95 to produce sunglasses that sell for $21.99. How many pairs of sunglasses must the manufacturer sell to make a profit of $10,530? 1 pairs of sunglasses
*September 10, 2014*

**algebra**

A motorboat left a harbor and traveled to an island at an average rate of 11 knots. The average speed on the return trip was 10 knots. If the total trip took 4.2 hours, how far is the harbor from the island
*September 10, 2014*

**algebra**

It costs a manufacturer $7.95 to produce sunglasses that sell for $21.99. How many pairs of sunglasses must the manufacturer sell to make a profit of $10,530
*September 10, 2014*

**algebra**

An investment adviser invested $14,000 in two accounts. One investment earned 4% annual simple interest, and the other investment earned 2.5% annual simple interest. The amount of interest earned for 1 year was $458. How much was invested in each account?
*September 10, 2014*

**Physical Science**

What is the kinetic energy of a 1850 kg car that is traveling at 58.0 km/h? B. How much work was done to give the car this kinetic energy assuming the car starts from rest? C. How much work must be done to stop the car?
*September 10, 2014*

**Physical Science**

A lamp bulb is rated 100w. Why is a time factor not included in the rating?
*September 9, 2014*

**Physicsl Science**

A cart on a linear track has a uniform acceleration of 0.172 m/s^2. What is the velocity of the cart 4.00 s after it is released from rest?
*September 8, 2014*

**Physical Science**

An 84.9 kg man is standing on a frictionless ice surface when he throws a 2.00kg book at 11.1m/s. Do the man move in the same direction as the book or opposite of the book.
*September 7, 2014*

**Physical Science**

If six blocks of wood were cut from the same board , would all the pieces of wood have the same density?
*August 30, 2014*

**Physical Science**

Do wood float in gasoline and water?
*August 30, 2014*

**calculus**

1. Estimating the Temperature of a Yam Suppose you put a yam in a hot oven, maintained at a constant temperature of 200C. As the yam picks up heat from the oven, its temperature rises.16 (a) Draw a possible graph of the temperature T of the yam against time t (minutes) ...
*August 27, 2014*

**Physical Science**

If one measurement is known much more precisely than the other, the fractional error is the ratio of the absolute value of the difference (|M1-M2|), and the more accurate value. What is the percentage error of student A's measurement (37.2 cm long if it is determined by ...
*August 25, 2014*

**grammar**

"there are no bruits auscultated - are bruits and auscultated nouns,pronouns etc?
*July 30, 2014*

**Reading**

Except for a few pigeons, Central Park was deserted. Mist hung above the chilled grass. Patches of old snow, scattered here and there, looked like white puddles. The sun hung just above the horizon, casting red and orange streaks across low-hanging clouds. The portly, gray-...
*June 12, 2014*

**Intermediate algebra**

can you solve the quadratic function? y = 2x^2 + 3
*June 1, 2014*

**science**

If a 0.5 L container of juice contains 15 g of sugar, what's the concentration of sugar? A. 30 g/L B. 3.33 g/L C. 45 g/L D. 7.5 g/L I think b
*May 26, 2014*

**Math 222**

find the domain of each rational expression in set notation. x^2-36 divided by 3x 7w-2 divided by 16w^2-1 Then do both rational expressions have excluded values in their domains? If yes, explain why they are to be excluded from the domains. If no, explain why no exclusions are...
*April 30, 2014*

**calculus**

9x^3+5x-8/3x-2
*April 29, 2014*

**calculus**

(2y^3-3y^2+3y-4)/(y-2)
*April 29, 2014*

**calculus**

x^2+5X/(x^3-25x)(x-5)^-1
*April 29, 2014*

**Math**

What is the interest due on $57,000 at 7 1/2% from June 2008 until today
*April 27, 2014*

**Science**

Planet X is now consider a Kuiper belt object. True or False
*February 27, 2014*

**Math**

parallel to 3x - 4y + 4 = 0 with the same x-intercept as y = 1/2 x -4
*February 26, 2014*

**Science**

How will precession of the Earth's rotation axis affect the month when the Sun will be in the current constellation in the future?
*February 22, 2014*

**Science**

In which constellation is the Sun currently located?
*February 22, 2014*

**Astronomy**

How can Google Earth be used to access the size of the Earth?
*February 20, 2014*

**Astronomy**

What type of spectrum is sunlight?
*February 18, 2014*

**Astronomy**

Why is the portion of the Moon opposite the direction of the Sun not apparent?
*February 16, 2014*

**Astronomy**

What type of lines does the solar spectrum show?
*February 16, 2014*

**Astronomy**

Why is the portion of Venus opposite the direction of the Sun not apparent.
*February 16, 2014*

**Astronomy**

How large should Venus appear in arc seconds? Use the small angle formula and the diameter of Venus. Note that an arc second is a 1/60th of an arc minute, and an arc minute is a 1/60th of a degree.
*February 16, 2014*

**Astronomy**

Why is it possible that the Sun may then have been in a different constellation than your "Sun Sign" on August 12, 1953.
*February 13, 2014*

**Astronomy**

What is my Astrological "Sun Sign" and how was it determine if I was born on August 12, 1953.
*February 13, 2014*

**Astronomy**

If I was born on August 12, 1953 what is the constellation of my Astrological"Sun Sign".
*February 13, 2014*

**physis**

Search: 2. Explain how radioactive decay has always warmed the Earth from the inside, and nuclear fusion has always warmed Earth from the outside.
*January 26, 2014*

**Penn foster **

With respect to major rivers, the Mekong is to Vietnam as the Irrawady is to
*December 3, 2013*

**interpersonal communications**

because words have human senders and receivers, they also have multiple intentions and interpretations. True or False
*November 4, 2013*

**Chemistry-Stoichiometry**

what is the limiting reactant if 0.10 moles Fe and 0.16 moles O2 react according to the reaction 4Fe +3O2 -> 2Fe2O3?
*October 19, 2013*

**Math**

During a semester, a student received scores of 76, 80, 83, 71, 80, and 78 on six tests. What is the student's average score for these six tests?
*August 9, 2013*

**Math**

how do I work this problem step by step? 3yd5ft + 6yd2ft This is how I worked the problem 3 yd 5ft +6 yd 2ft 9yd 7ft
*July 7, 2013*

**help please**

It is recommended that a person ________ to manage and reduce stress. A. Talk to family and friends B. Eat more frequently C. Beat oneself up D. None of the above I think its a?
*July 5, 2013*

**help please**

Cosmetic surgery is more likely to lead to disappointment if a person is ________. A. Seeking surgery with the hope of influencing a change in oneself B. Seeking surgery with the hope of influencing a change in someone else C. Seeking surgery with the hope of influencing a ...
*July 4, 2013*

**Business Math**

Office Market is having a sale on printer paper. If you buy 2 reams for $8.99 each, you will get a third ream free. Calculate the markdown percent. (Round the percent to the nearest tenth.) If the offer were changed to “Buy 3, Get 2 Free,” what would be the new ...
*May 31, 2013*

**algebra**

Find the distance, d,across the river. Assume that the ratio of d to 90ft is the same as the ratio of 100ft to 50ft
*March 12, 2013*

**economics 1, bus 121**

how do i write a macroeconomic analysis on a foreign currency(brazil)vs. united states dating back 2005-2010, including etf? need help
*March 8, 2013*

**Math**

Maria leaves her house to meet jane at the zoo. Jane lives further away than Maria and drives 8mph fatser than Maria. Their combined distance is 84 miles. If they both drive 45 minutes, find their average speeds.
*February 19, 2013*

**bramalea secondary school**

how many ways can you roll a pair of standard dice without getting a double?
*February 11, 2013*

**Algebra**

how can i break this down .2y+4.2=
*January 24, 2013*

**Sociology**

yes
*January 23, 2013*

**math**

What would 350 dollars at 5 % compounded semi annually for 40 years amount to?
*January 17, 2013*