Thursday

August 25, 2016
Total # Posts: 1,895

**math**

Indira reacts that the actual difference of 19-7.82 will be greater than the estimate of 19-8=11.Is Indira correct?Explain how Indira might have arrived at the prediction without subtracting the actual numbers.
*August 24, 2016*

**6**

The pet store aquarium holds 32 fish. Today 13 angelfish and 19 are clownfish to the total number of fish in the aquarium
*August 8, 2016*

**Calculus AB**

A rectangle is inscribed in a right triangle with legs of length 5 and 12. The sides of the rectangle are parallel to the legs of he triangle. Find the dimensions of the rectangle that has the largest area?
*July 30, 2016*

**Calculus AB**

A 5.5 foot man walks away from a 12 fokt lampost at a constant speed. At a given moment, let l be the length of the man's shadow (along the ground) and ket x be his distance from the lampost. Sketch a figure that represents the problem Express l in terms of x
*July 30, 2016*

**Calculus AB**

The height h of a closed cylindical tank is 4 times longer than he radius r. Write the volume of the tank as a function of r. Write the total surface area of the tank in terms of h.
*July 30, 2016*

**Calculus AB **

Water pours at a constant rate into a conical tank of height 10 feet and radius 4 feet. Let V, h and r be the volume, height, and radius if the water in the tank at a particular time t. Express the volume of the water in the tank at any time t as a function of h only.
*July 30, 2016*

**Calculus AB**

Let f be the function that is given by f(x)=(ax+b)/(x^2 - c). It has the following properties: 1) The graph of f is symmetrical with respect to the y-axis 2) The graph of f has a vertical asymptote at x=2 3) The graph of f passes through the point (-1,3) Determine the values ...
*July 30, 2016*

**Calculus AB**

Theta is an angle between the lines L1 and L2 with the slopes m1 and m2. Prove that tan theta= (m2 - m1)/(1+m2m1).
*July 30, 2016*

**Calculus AB**

If r and s are roots of the pokynomial equation x^2 + bx + c, show that b=-(r+s) and c=rs
*July 30, 2016*

**Calculus AB**

Solve graphically (x-2)^3(x+4)(3-x)^2(x+1)^4 <0
*July 30, 2016*

**Calculus AB**

A hiker walks due east for 40 minutes, then changes course by going South 25 degrees West. After 20 minutes, he changes course again, this time at South 75 degrees East. He goes through this path for one hour after which he heads north reaching his final destination in 15 ...
*July 30, 2016*

**Calculus AB**

One of the equal angles of an isosceles triangle is 55 degrees. If the base is 20 cm, what is the perimeter and the area?
*July 30, 2016*

**Calculus AB**

Thanks a bunch. And I got 4.967 meters as the final answer based off of what you gave me.
*July 30, 2016*

**Calculus AB**

From a height of 10 meters in the third floor of an apparent that building, the angle of depression of two cars moving on the same lane and in the same lane and in the same direction measure 29.5 degrees and 38.2 degrees. How far are the two cars from each other? This ...
*July 30, 2016*

**Calculus AB**

What is an algebraic expression for cot(arccos ((x+1)/2)?
*July 30, 2016*

**Calculus AB**

Without using a calculator, what is the exact value of sec(arctan(12/5)) - sin(arccot(3/4))
*July 30, 2016*

**Math CSET**

A student scores 96 on a test. The class average is 84, with a standard deviation of 4 points. What percentage of the class scored below this student? I understand the 96-84/4 part to obtain a z-score of 3. What I do not understand is, if I do not have access to a z-score to ...
*July 21, 2016*

**Maths**

if a spinner is divided into 6 equal parts ,when it's spun, what is the probability of spinning on 4?
*July 13, 2016*

**Physics**

You jump across and down a crevasse from rest. You land on the other side at a speed of 10.5 m/s directed 67.6° below the horizontal. The other side is 4 meters lower. How wide was the crevasse? No Idea if I am doing this right. But so far what I done was 10.5Sin(67.6...
*July 5, 2016*

**Physics**

You jump across and down a crevasse from rest. You land on the other side at a speed of 10.5 m/s directed 67.6° below the horizontal. The other side is 4 meters lower. How wide was the crevasse? No Idea if I am doing this right. But so far what I done was 10.5Sin(67.6...
*July 5, 2016*

**physics**

one cubic meter of water hass a mass of 1.0x10^-3. (a) determine the mass of 1.0 m^3. (b) assu!ing biological substance are 98% water, estimate the mass of cell with a 1.0 micrometer dia!eter, a human kidney and a fly. assume a kidney is roughly a sphere with radius of 4.0 cm...
*June 18, 2016*

**Physics**

16.8seconds
*June 12, 2016*

**Physics**

16.8mm
*June 12, 2016*

**Physics**

A 10 kg block is towed at a 30° incline with respect to the horizontal the rope is parallel to the incline and has attention 100 N assume that the block starts from rest at the bottom of the hill and neglect friction how fast is the block moving after 40 m up the hill
*June 8, 2016*

**pre-algebra**

is (-1, 5) a solution to 2 x = y - 7 and 2 y = - x + 9
*May 24, 2016*

**IT**

why is system Burn-in important?
*May 15, 2016*

**math**

Find dy/dx and d2y/dx2. x = e^t, y = te^t
*May 2, 2016*

**Life orientation**

Describe the three human rights violations
*April 17, 2016*

**English**

As the world influence shift so will the language. To teach a language is to aid communication between individuals. Its not whether there is a right or wrong. For example there can be a mathematical language with its own vocabulary that allows mathematicians to communicate ...
*April 14, 2016*

**social studies**

What they are referring to is the battle at the Alamo which is in San Antonio TX. During this time a 100 Texas soldiers fought against approximately 1,500 Mexican soldiers. The did loose however after 10 DAYS, they had killed or injured more then 600 Mexican Soldiers. From ...
*April 14, 2016*

**PHYSICS**

please show step by step!
*April 14, 2016*

**PHYSICS**

Point A is 2.0 meters away from a charge of -3.o(Mu) and 3.0 meters away from a charge of +1.5(Mu) as shown. A) Find the net Electric field at point A B) Find the total electric potential at point A Answer This Question
*April 14, 2016*

**Physics**

A 1.4 kg box that is sliding on a frictionless surface with a speed of 10 m/s approaches a horizontal spring. The spring has a spring constant of 2000 N/m. (a) How far will the spring be compressed in stopping the box? (b) How far will the spring be compressed when the box'...
*April 10, 2016*

**factoring polynomiald**

8b(2power)+ 6b +1=
*April 10, 2016*

**science:chemistry**

magnesium trioxocarbonate (IV) decomposed according to the equation MgCO3(s) -MgO2(s) + CO2(g).if 6.0g of magnesium trioxocarbonate (IV) is completely decomposed ,calculate :i. the mass of carbon (IV) oxide produced
*April 6, 2016*

**Physical science 7th grade**

What is the internal structure of the cavefish and the minnow suggest common ancestry?
*April 2, 2016*

**He**

which organ is part of both the respiratory and digestive systems
*April 1, 2016*

**Health**

the main parts of the central nervous system consist of the brain and the
*April 1, 2016*

**Health**

why does the blood returning to the heart have very little oxygen in it
*April 1, 2016*

**Math**

idk
*April 1, 2016*

**Math**

If the ratio of red cars to Blue Cars is 3 to 5 and there are 55 blue cars how many red cars are there?
*March 30, 2016*

**owens**

i need help in writing an essay for more details- bit.ly/21OERpv written in APA style
*March 29, 2016*

**Check My Answer! :)**

What is the surface area of the square pyramid if the altitude is 4 cm, the length is 6 cm, and the height is 5 cm? a. 48 cm^2 b. 144 cm^2 c. 156 cm^2 d. 96 cm^2 i think the answer is 144 cm^2. Please show me how you did the work so then i know that i at least got partial ...
*March 29, 2016*

**Chemistry**

What is the total mass of KNO3 that must be dissolved in 50 g of water at 60 degree C to make a saturated solution?
*March 22, 2016*

**mathematics**

A train takes 5mins to cover a distance of 3km between two stations P and Q. Starting from rest at P, it accelerates at a constant rate to a speed of 40km per hour and maintains this speed until it is uniformly brought to rest at Q. If the train takes three times as long to ...
*March 14, 2016*

**Inorganic Chemistry**

In a constant-pressure calorimeter, 70.0 mL of 0.340 M Ba(OH)2 was added to 70.0 mL of 0.680 M HCl. The reaction caused the temperature of the solution to rise from 22.00 °C to 26.63 °C. If the solution has the same density and specific heat as water (1.00 g/mL and 4....
*March 11, 2016*

**Inorganic Chemistry**

In a constant-pressure calorimeter, 70.0 mL of 0.340 M Ba(OH)2 was added to 70.0 mL of 0.680 M HCl. The reaction caused the temperature of the solution to rise from 22.00 °C to 26.63 °C. If the solution has the same density and specific heat as water (1.00 g/mL and 4....
*March 11, 2016*

**Inorganic Chemistry**

A researcher studying the nutritional value of a new candy places a 4.70-gram sample of the candy inside a bomb calorimeter and combusts it in excess oxygen. The observed temperature increase is 2.98 °C. If the heat capacity of the calorimeter is 39.80 kJ·K–1, ...
*March 11, 2016*

**Math**

Write a story problem to represent six divide by 1/5
*March 9, 2016*

**Life orientation**

no wrong
*March 8, 2016*

**Bussiness management**

hiiiiiiiii
*March 8, 2016*

**math**

Mike had a jar of nickels that had five more nickels than he originally thought. If the total amount of nickels was $4.35, how many nickels did Mike think he had originally?
*March 5, 2016*

**math**

James wants to buy a 50-inch flat-screen television, and the model he wants costs $1,200. So far, he has saved $700, but still needs $500 more. The bank where he has a checking and savings account will loan him $500 at 12% annual interesting using a 90-day promissory note. ...
*February 29, 2016*

**math**

$12,500 x 2 = confused about the rest.
*February 29, 2016*

**math**

After purchasing the apartment, Seth receives a street, sewer, and gutter assessment for $12,500 due in 2 years. How much would he have to invest today in a CD paying 2%, compounded semiannually, to fully pay the assessment in 2 years?
*February 29, 2016*

**math**

can't figure this out please somebody help me i'm not good at math how do i do the calculations
*February 29, 2016*

**math**

A friend of Seth’s who is a real estate developer needs to borrow $80,000 to finish development project. He is desperate for cash and offers Seth 18%, compounded monthly, for 2 ½ years. Find the future value of the loan using the future value liable. Does this loan...
*February 29, 2016*

**math**

After looking at the results from questions 1, and 2. Seth realizes that a 2% return in a certificate of deposit will never allow him to reach his goal of $1 million in 10 years. Presuming his apartment will indeed be worth $400,000 in 10 years, compute the future value of ...
*February 29, 2016*

**math**

how do i figure this answer out im confused
*February 29, 2016*

**math**

. Seth’s current bank offers a 1-year certificate of deposit account paying 2% compounded semiannually. A competitor bank is also offering 2%; but compounded daily. If Seth invests the $100,000, how much more money will he have in the second bank after one year, due to ...
*February 29, 2016*

**math**

Find the finance charge on a credit card with an average daily balance of $465 if the rate charged is 1.25%.
*February 29, 2016*

**math**

An electric mixer was purchased on the installment plan for a down payment of $60 and 11 monthly payments of $11.05 each. The cash price was $170. Find the annual percentage rate.
*February 29, 2016*

**math**

Find the amount of money that Keaton and Jana Smith must set aside today so that they will have $5,000 available to buy a home security system to one year if the annual interest reate is 5% compounded annually.
*February 29, 2016*

**math**

Manually calculate the compound interest on a 13% loan of $1,600 for three years if the interest is compounded annually.
*February 29, 2016*

**math**

Alice Dubois was charged $455 in finance charges on a loan for 15 months. Find the finance charge refund if she pays off the loan in full after 10 payments.
*February 28, 2016*

**Chemistry**

Pyridine, a substance used as a catalyst in some synthetic reactions is a very weak base its degree of ionization is equal to 0.03% in solution 0.02 mol L -¹. Determine the ionization constant.
*February 23, 2016*

**Chemistry**

The methane gas is formed by 25% hydrogen in mass which the ratio between the mass of carbon and hydrogen in this gas?
*February 22, 2016*

**PLEASE MATH**

Giuseppe purchases an Internet, Inc $100,000 bond at 102.25 that pays 3.5% What is the (A)cost of the bond (B) Annual interest and (C) annual yield?
*February 17, 2016*

**Cal 2**

The region bounded by y=3/x, y=0, x=3, and x=5 is rotated about the x-axis. Find the volume of the resulting solid.
*February 10, 2016*

**Cal 2**

Find the volume of a frustum of a right circular cone with height 25, lower base radius 30 and top radius 13.
*February 10, 2016*

**Math**

What is the formula The value of Dave's Camaro decreased by 30%. The car is worth $14,000. What was the purchase price?
*February 6, 2016*

**Physics**

A hollow sphere has a uniform volume charge density of 2.22 nC/m3. The inner radius is a = 12.2 cm and the outer radius is b = 24.4 cm. What is the magnitude of the electric field at 18.3 cm from the center of the sphere? What is the magnitude of the electric field at 78.1 cm ...
*February 2, 2016*

**math**

In my math class tests are 70% and homework is 30% so if i wanted at least an 80% how much would be the least percentage i needed in each category
*February 1, 2016*

**math**

In my math class tests are 70% and homework is 30% so if i wanted at least an 80% how much would be the least percentage i needed in each category
*February 1, 2016*

**Physic**

A tray move with a velocity of 10m|s in 2 minute. calculate the distance covered.
*January 31, 2016*

**Math**

Tony had an equal number of cranberry bars and walnut bars. He gave away 66 cranberry bars. He then had 4 times as many walnut bars as cranberry bars left. How many bars did he have at first?
*January 28, 2016*

**algebra 8th grade**

rectangle is dilated by 9. image is dilated using scale factor of 1/8. How do I figure out the scale factor that the original rectangle cold have been dilated to get the final rectangle
*January 25, 2016*

**English**

Reed, between Roosevelt and Herbert. I know President Roosevelt, but very little of the Great Depression. And again thank you.
*January 21, 2016*

**English**

Ms. Sue I know, but I don't know how to start or something.
*January 21, 2016*

**English**

Critical Thinking questions Need help!! Due tomorrow. 1. According to each President, who could best bring about social and economic change? 2. What actions did each President take to respond to the Great Depression? 3. Roosevelt asserted that the expanded reach of the federal...
*January 21, 2016*

**math**

6x2-13xy+5y2 (2x+13+6x+5
*January 18, 2016*

**Algebra**

On Monday, Linus made 5k paper cranes and gave 2k paper cranes to his friends. On Tuesday, he made another 4k paper cranes. His friend gave him 5 paper cranes. How many paper cranes does he have now in terms ok k?
*January 11, 2016*

**Math**

5m6 --- 3n
*January 11, 2016*

**Language Arts**

Well, I am assuming that you would be appealing to the public. If you were trying to convince a businessman to keep it, the answer would be C. However, that argument could be countered by "There are few of them for a reason". Describing the times you and your friends...
*January 11, 2016*

**Math**

A Shopkeeper sold a total of 15 boxes of pencils on Monday and Tuesday. He sold 3 more boxes on Monday than on Tuesday. There were 12 pencils in each box. How many pencils did he sell on Monday?
*January 10, 2016*

**Math**

Apples are sold at 3 for $2 at Busy Mart. At Big Foods, the same apples are sold at 5 for $2. Kassim buys 15 apples from Big Foods instead of Busy Mart. How much does he save?
*January 10, 2016*

**Math **

Elena bought 49 packets of red balloons, 66 packets of blue balloons, and 35 packets of yellow balloons. Each pack contained 12 balloons. She mixed them up and gave away some balloons. She then repacked the balance into packets of 25. How many balloons where there altogether?
*January 9, 2016*

**Geometry**

Thank you very much :D
*January 7, 2016*

**Geometry **

I really need help with this question :( A pentagon has two exterior angles that measure (3x), two exterior angles that measure (2x + 22) and an exterior angle that measure (x + 41). If all of these angles have different vertices, what are the measures of the exterior angles ...
*January 7, 2016*

**English **

What is Szymborska's overall opinion of humanity in "A Contribution to Statistics?" Support your response with at least two details or quotes from the poem. ___ I'm kind of torn on this one, because I want to say it's a pessimistic tone on humanity...but ...
*January 2, 2016*

**Science - Please Help!!!**

Its B
*December 10, 2015*

**Math**

A box that holds an expensive pen has square ends, and its length is 13 cm longer than its width. The volume of the box is 60 cm^3. Determine the dimensions of the box.
*December 4, 2015*

**Algebra II**

Thanks, Steve! Yes on #4 its suppose to be +2x so my bad.
*November 24, 2015*

**Algebra II**

Need help please. Thank you. 1. Determine whether the function has a maximum or minimum. State that value. f(x)= -2x^2-4x 2. Determine what c would in order to complete the square. x^2-5x+c 3. Solve the quadratic by factoring. 3x^2-16x+5=0 4. Solve the quadratic by factoring. ...
*November 24, 2015*

**Physics**

An airplane is circling an airport by traveling a horizontal circular path at a speed of 400 km/h. The bank angle of the wings is 20 degrees. What is the radius of the circular path the plane is flying? I honestly do not know where to start this. And it is an algebra-based ...
*November 13, 2015*

**science**

What would be the volume of a gas inside a 360cm box?
*November 11, 2015*

**mathematies**

a car travels 175km in 7/2 hours and how far will it travel in 3/2hours
*November 3, 2015*

**math **

If a book is discounted by 15% and you save $3.00, how much is the book originally?
*October 29, 2015*