Monday

February 20, 2017
Total # Posts: 105,329

**pre calculus**

how do you use e^a+bi = e^(cos b + i sin b) to derive the equation e?i + 1 = 0

*November 26, 2016*

**math**

If f is a function such that the limit as x approaches a of the quotient of the quantity f of x minus f of a and the quantity x minus a equals 7, then which of the following statements must be true?

*November 26, 2016*

**math**

If f(?1) = ?3 and f prime of x equals the quotient of 4 times x squared and the quantity x cubed plus 3 , which of the following is the best approximation for f(–1.1) using local linearization

*November 26, 2016*

**math**

Which of the following is the best linear approximation for f(x) = sin(x) near x = ? seconds?

*November 26, 2016*

**Physics**

If the angle of incidence is 30degree and refractive index is 2 find the angle of refraction.find whether the medium is denser or rarer

*November 26, 2016*

**.**

This is what I got I was just unsure if it was right, thank you.

*November 26, 2016*

**Maths help asap please**

What is the smallest integer of c that satisfies the inequality of 3c-7 > 5c+4 Many thanks.

*November 26, 2016*

**math**

Thr sum of three numbers is 33.The first no.is twice the third no.The second no.is one more than the first.Determine the nos.

*November 26, 2016*

**Math**

The sum of two nos is 40, the smaller no is 6 less than the larger no, Find the nos

*November 26, 2016*

**Physics**

I omega = constant before I suppose we could model the device as a flat disk I = .5 M r^2 = .5(118)(1.8)^2 I omega = I (.47*2 pi) now after Inew = I + 20(1.8)^2 so I omega = Inew Omeganew .5(118)(1.8)^2(.47*2 pi)=Inew* Omeganew that will give omega new in radians/sec divide by...

*November 25, 2016*

**Physics**

A playground merry–go–round has a mass of 118 kg and a radius of 1.80 m and it is rotating with an angular velocity of 0.470 rev/s. What is its angular velocity after a 20.0–kg child gets onto it by grabbing its outer edge? The child is initially at rest.

*November 25, 2016*

**chemistry**

if i have an isopropyl group and the a carbon with a methyl group on it, will the methyl protons be split by the isopropyl protons? (CH3)2---C-C-(CH3)

*November 25, 2016*

**Physics**

(1/2) m v^2 = m g h

*November 25, 2016*

**Physics**

Jacob is a little too excited about finishing his homework and throws his hands up in the to shout, "I'm done!" He accidentally drops his 2.3 kg pencil straight down from a height of 2.12 m. what will be the kinetic energy of the pencil just before it hits the ...

*November 25, 2016*

**Physics**

Jacob is working on his physics portfolio and stands on a 0.45m high step. If Jacob’s mass is 103kg, what is his potential energy while on top of the step? Givens: Unknown: Equation: Substitute: Solve:

*November 25, 2016*

**biochemistry**

how many grams each of tris and tris HCl are needed to make up 500ml of 1m tris buffer with a PH of 8.0. pka of tris =8.3 mwt of tris =121 mwt of tris HCl =175

*November 25, 2016*

**chemistry NMR helpppp**

really really need some help, been stuck on this for toooo long. Some Data: "A" triplet for 3H (2 neighbors) "B" quartet for 2H (3 neighbors) "C" singlet for 3H (no neighbors) "D" singlet for 2H (no neighbors) Alright here is what i have...

*November 25, 2016*

**Math**

The difference between a number and the number that formed by reversing the digits is 36.if the digit at the tens place is twice the digit at the unit's place.find the number

*November 25, 2016*

**accounting**

A debit increases the balance in all of the following accounts except for which one?

*November 24, 2016*

**math**

A bus contain 42 passengers the number of male is 5 times the number of female how many famale in the bus

*November 24, 2016*

**Math**

How do you multiply 12 times 13 step by step step

*November 24, 2016*

**English**

recent

*November 24, 2016*

**Chemisty**

I guess that 22.909 L

*November 23, 2016*

**wirting**

how to use APA citing on the following phase "The movie Silver Linings Playbook"

*November 23, 2016*

**simplex method**

Maximize P=60x+50y. ? ?x+y?80 ? ?5x+10y?560 ? ?50x+20y?1600 ? ?x?0 ? ?y?0 ? ? ? ? ? ? ? Use the simplex method to solve the problem. Use s, t, and u as your slack variables for the first, second, and third inequalities respectively. Use the final simplex tableau to identify ...

*November 23, 2016*

**Calculus**

An object at the origin at time t= 0 has velocity measured in meters per second, v(t) = t/30 if 0 <= t <= 90 = 3 if 90 < t <= 108 = 9-(t/30) if 180 < t When, if ever, does the object return to the origin? t=

*November 23, 2016*

**Further mathematics**

Given that x squared + y squared = 5xy,show that; (a) 2log(x+y\?7)=log x + log y. (b). Log ( x- y\?3) = 1\2( log x + log y)

*November 23, 2016*

**pre calculus**

can you please explain what steps you take to find ||u||2 when u: <-1,7> v: <6,4>?

*November 23, 2016*

**pre calculus**

Can you explain how to find (u • v)(u + v) when u <-1, 7> and v <4, -3>

*November 23, 2016*

**Calculus**

Find all values of c that satisfy the Mean Value Theorem for integrals for f(x)= x^{2} on the interval [-3, 3]

*November 23, 2016*

**The Graphical Method**

Appericate it !

*November 23, 2016*

**Calculus**

If f(x) = integrate t^2 from x to x^2, then f'(x)= f'(-1)= Please help! I have no idea how to approach this.

*November 23, 2016*

**mathematics**

novel. x=5.

*November 23, 2016*

**mathematics**

a survey of reading habits of 100 students showed that 30 read both comics and novels. 10 read neither comics nor novels and twice as many students read comics as read novels. 1. illustrate the information on a Venn diagram. 2. how many students read only novels. 3. how many ...

*November 23, 2016*

**calculus**

how do you work out what ||u||2 is when you are given u:<-1,7> and v:<6,4>

*November 23, 2016*

**pre calculus**

Given: u <-1, 7> and v <4, -3> Find: (u • v)(u + v) ________________________________________ <25, 100> <-25, 100> <-75, -100> <75, -100>

*November 23, 2016*

**pre calculus**

Use the following vectors to answer the question. u: <-1,7> v: <6,4> What is the projection of u onto v?

*November 23, 2016*

**pre calculus**

Use the following vectors to answer the question. u: <-1,7> v: <6,4> What is ||v||2?

*November 23, 2016*

**pre calculus**

Use the following vectors to answer the question. u: <-1,7> v: <6,4> What is ||u||2?

*November 23, 2016*

**algebra~help me**

18^(4-4y)=54(sqrt(2))^(3y-2) step plz help me

*November 23, 2016*

**physics**

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.

*November 23, 2016*

**physics**

Does the kinetic energy of a car change more when it speeds up from 10 to 15 m/s or from 15 to 20 m/s? Explain.

*November 23, 2016*

**Economics(pls Help)**

Zoe Goggles is a deep sea underwater photographer. Her camera and lenses are valued at $4,000. There is a chance of 1/20 that she will lose her equipment on a dive over the course of the year. Her wealth, including the value of her equipment, is $30,000. Zoe’s utility ...

*November 23, 2016*

**math**

the sum of two no is 50 .the smaller no is two third of the greater no.. find the no.

*November 22, 2016*

**Physics**

A 103kg SWAT team member descends a 27.5m cable attached to a helicopter. If he wishes to reach the bottom in 3.5s, what average force should he apply to the cable?

*November 22, 2016*

**math**

Bob needs to mix 2 cups of orange juice concentrate with 3.5 cups of water to make orange juice. Bob has 6 cups of concentrate. How much orange juice can he make?

*November 22, 2016*

**Algerbra**

Write an equation in slope-intercept form of the line that passes through the given point and is parallel to the graph of the given equation. (-8, -4); y=-4x+3 Write an equation for the line in slope-intercept form.

*November 22, 2016*

**Math**

A movie theater sold 3 adult tickets for every 5 children tickets. They sold 180 more children tickets than adult tickets. How many children tickets were sold and how many adult tickets were sold?

*November 22, 2016*

**Math**

How many different integers represent the sum of two or more members of the set {-4,-3,-2,-1,0,1,2,3,4}?

*November 22, 2016*

**Math**

Deposit $5 weekly in 40 yrs what is the balance

*November 22, 2016*

**PHYSICS URGENT!!!**

maybe you should listen in our sef005 lectures

*November 22, 2016*

**maths need help**

If Log (a+3) (base 9) - log b(base 9)= c + (1/2) and log (a-3) (base 3) + log b (base 3)=c - 1. show that a^2=9 + 27^c and find the possible values of a and b when c=1

*November 22, 2016*

**Math**

Q. a^4 - 13a + 36 Factorise

*November 22, 2016*

**PHYSICS PLEASE HELP ME**

ay that makes no sense cuz. Fix up look sharp bruv.

*November 22, 2016*

**math**

If a circle is circumscribing triangle xyz,find the radius of the triangle. Calculate the area inside the circle but outside the triangle

*November 22, 2016*

**Chemistry**

Is "a color of solution becoming less intense due to dilution" maybe evidence of chemical reaction or not?

*November 21, 2016*

**Physics**

Is it true that with buoyancy, the weight of the displaced water equals the weight of the complete object, even if only a part of the object is submerged? If so, why, since the weight of a larger object would be greater than that of a smaller one?

*November 21, 2016*

**algebra**

The revenue function for a bicycle shop is given by R(x) = x Â· p(x) R x x p x dollars where x x is the number of units sold and p(x) = 100 âˆ’ 0.4x p x 100 0 4 x is the unit price. Find the maximum revenue.

*November 21, 2016*

**dav chd**

Depress the quartic x^4 - 4x^3 + 2x^2 + 4x + 4 into w^4 - 4w^2 + 7

*November 21, 2016*

**american goverment check answers**

random is correct, I just took the quiz its: 1.)C 2.)C 3.)A 4.)A 5.)C 6.)C 7.)A 8.)C 9.)D 10.B

*November 21, 2016*

**american goverment check answers**

9.a

*November 21, 2016*

**american goverment check answers**

9. What criteria might a judge who abides by a philosophy of judicial restraint use to decide a case? (1 point) The judge would consider previous court decisions on the topic but ultimately consider the current circumstances and changes in society. The judge would not consider...

*November 21, 2016*

**social studies**

On November 12, 1815 Elizabeth Cady Stanton spokesperson for the rights of women was born in Johnston, New York. Stanton formulated the philosophical basis of the woman suffrage movement, blazing a trail many feared to follow. Stanton verbal brilliance combined with the ...

*November 21, 2016*

**science**

A librarian lifts a box of books that weighs 93N a distance of 1.5 m. How much work does he do?

*November 21, 2016*

**Science**

what question

*November 21, 2016*

**Science**

knowlege

*November 21, 2016*

**algebra**

It took Joe 1 1/2 hours to walk to the mall. James did it in 1/5 of the time it took Joe. How long did James take?

*November 21, 2016*

**general**

Hmmm. What you mean is that you want her to digest the articles and explain what they mean, rather than reading them yourself and giving it some thought.

*November 21, 2016*

**Math**

56 decreased by twice Craig's savings

*November 21, 2016*

**Social studies**

It doesnt say the answer in their

*November 21, 2016*

**Social studies**

Can u help me

*November 21, 2016*

**Social studies**

Hi ms sue what is the answer to the question A; they allow producers better access to world markets ? B; they make it possible to employ more skilled labores ? C ; they provide tools that make production more efficient ? D ; they purchase raw materials needed for production

*November 21, 2016*

**Social studies**

How are capital resources used in production

*November 21, 2016*

**Maths help asap please.**

Thank you so much.

*November 21, 2016*

**Maths help asap please.**

The product of two consecutive positive integers is added to the larger of the two integers. Prove that the result is always a square number. Thank you for your help.

*November 21, 2016*

**Maths**

The product of two consecutive positive integers is added to the larger of the two integers. Prove that the result is always a square number. Thank you for your help.

*November 21, 2016*

**math**

area of a regular octagon of side 12.5

*November 21, 2016*

**Physics**

In a vertical lifting an object with mass of 2kg is lifted 1m above the ground. A work of 80J is done with a constant force. What is the acceleration of the object?

*November 21, 2016*

**Physics**

An astronaut lands on a distant planet and places a mathematical pendulum with a length of 50 cm. He measures that the pendulum makes 100 oscillations in 136 sec. What is the gravity acceleration on that planet.

*November 21, 2016*

**chemistry**

Suggest a source of error (not already mentioned) that would result in a value of x that is a) higher than the actual value b) lower than the actual value

*November 20, 2016*

**College Math**

Suzan sees a bag of marbles, she grabs a handful at random. She has seen a bag containing three red marbles, four green ones, five white ones, and one purple one. She grabs seven of them. Find the probability of the following event, expressing it as a fraction in lowest terms...

*November 20, 2016*

**physics**

A solar collector is placed in direct sunlight where it absorbs energy at the rate of 780 J/s for each square meter of its surface. The emissivity of the solar collector is e = 0.76. What equilibrium temperature does the collector reach? Assume that the only energy loss is due...

*November 20, 2016*

**Life Science Math**

Cheetahs are the fastest land mammal. They can accelerate from 0 to 60 mph in 3 seconds. Assuming a cheetah’s acceleration is constant, how far has it run during that time interval?

*November 20, 2016*

**Mcro-Econ**

na

*November 20, 2016*

**interior decoration**

Which one of the following colors can you use to make a warm room seem cooler? A. Orange C. Yellow B. Red D. Blue

*November 20, 2016*

**american goverment check answers**

3. What type of court has original jurisdiction over a case involving an American suing a citizen of another country? (1 point) federal court state court Supreme ...

*November 20, 2016*

**Calculus**

A small island is 2 km off shore in a large lake. A woman on the island can row her boat 10 km/h and can run at a speed of 20 km/h. If she rows to the closest point of the straight shore, she will land 6 km from a village on the shore. How far from the village should she land ...

*November 20, 2016*

**Calculus**

A factory is located on one bank of a straight river that is 2000 m wide. On the opposite bank but 4500 m downstream is a power station from which the factory draws its electricity. Assume that it costs $3 per meter to lay an underwater cable and $1 per meter to lay an above ...

*November 20, 2016*

**math**

Toffees are bought at 4 for a rupee and the same number at 6 for a rupee. Then, they are mixed and sold at 5 per rupee. What is the net profit or loss?

*November 19, 2016*

**Algebra, 8th Grade mathematics**

I need help on this question. My aunt doesn't understand it so can you help me? 1+3+3^2+3^3+3^4+••••••+3^250=? The "^" is for Square, cube and ect. It also includes X= 3^?-1 Can you help me please?

*November 19, 2016*

**ENGLISH**

LOOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLOLLOOLOLOL TRYING TO GET ANSWERS FROM OTHERS AND MAKING THEM DO YOUR WORK? HAHAHAHAHHAHAHAHAHAHAH

*November 19, 2016*

**science**

what types of are formed when atoms share electrons unequally

*November 19, 2016*

**SS and i need SOS. please help me**

THIS IS CRAP I GOT 33.3%

*November 19, 2016*

**Science**

How much sugar is needed to reach the point of saturation at 20 degrees celsius?

*November 19, 2016*

**Math**

a) A woman is twice as old as her daughter. Five years ago the sum of their age was 62. What are their present ages. b) A bottle is half full. After adding 275 mL to the bottle it is three quarters full. How much does the bottle hold when full?

*November 19, 2016*

**Consumer Math**

On retirement Victor was offered the option of receiving monthly payment of $1674.08 or a lump-sum payment of $150667 a) What are the respective incomes per annum of each option if the lump sum can be invested at 11.5% p.a. b) At what interest rate must the lump sum be ...

*November 19, 2016*

**math**

Karen earns a weekly gross salary of $628. Tax of $148.90 is deducted. 4.5% is paid into a superannuation fund a 8% is paid directly towards mortgage. Karen aims to save 10% of her remaining income. What amount will she save each week?

*November 18, 2016*

**african american history**

WHAT WAS A MAJOR CONCERN TO FREE BLACKS

*November 18, 2016*

**Calculus**

Consider the function g(x) = sinxcosx. a. Find an equation of the tangent line to the graph of g at (pi/3, sqrt3/4). b. Find the critical number(s) of g on the interval [0, 2pi]. Does the function have a relative minimum, relative maximum, or neither at each critical number. ...

*November 18, 2016*