Tuesday

January 24, 2017
Total # Posts: 3,184

**Algebra logs please help**

Hi

*January 11, 2016*

**Math**

y=[(3-4x)^(2/3)]/[(x^2+8)^(1/3)*(7+4x^3)^2]

*January 11, 2016*

**Math- steve? reiny?**

1. Let f(x)=x^5 + 2x^3 + x - 1 Find f^-1(3) and (f^-1)'(3)? I have zero idea how to find the inverse of this function at a point 3, and how to take derivative of an inverse. 2.Let f(x)=cosx + 3x Show that f(x) is a differentiable inverse and find f^-1(1) and (f^-1)'(1...

*January 11, 2016*

**Chemistry**

In the lab, 5.8 L of methane gas is burned with excess oxygen gas at SATP. How much carbon dioxide gas is produced? **Based on the balanced chemical equation the ratio of methane gas to carbon dioxide is 1:1, this being said, does it make sense that as 5.8 L of methane gas is ...

*January 10, 2016*

**Math**

derivative of y=3(2x^(-1/2)+1)^(-1/3). I got -(2x^(-1/2)+1)*(-x^(-3/2))=y' but I don't know how to simplify it into 1/something. When I tried I only got [2x^(3/2)+x^2]/(x^(7/2)). Help with simplifying?

*January 10, 2016*

**geometry**

thanks

*January 9, 2016*

**geometry**

how can you find the geometric mean?

*January 9, 2016*

**Math**

I don't get what you did after log(Y)=Lim x->∞ (1/x)(xlog(5)+log(1+(2/5)^x) . Why is (2/5)^x -> 0, and hence log(1)=0??

*January 9, 2016*

**Math**

derivative of lim x->infinite (2^x+5^x)^(1/x)? I do it till [2^xln(2)+5^xln(5)]/(2^x+5^x) and then I can't simplify anymore. Help me out?

*January 9, 2016*

**Math**

Find limit as x approaches 0 of (1+sin4*x)^cotx I know how to do this question because there was a "hint“ in the question that said to use natural log. I was just wondering if someone could explain to me why using log works in this case along with l'hopital's...

*January 7, 2016*

**Science**

does any one know

*January 7, 2016*

**Math**

Could I please get some help for these 3 questions, apologies for asking so many, but they were the ones I was really unsure of: 1. Find an equation for the line tangent to y=ln(x) and that goes through the origin. I have no idea, the ln(x) stuff is confusing me. 2. derivative...

*January 6, 2016*

**Math**

The median of 8 numbers is less than zero. At most how many of the numbers are positive?

*January 6, 2016*

**Math**

Thank you very much! I get it now. For another question: y'=lim h->0 ((e^x+h)-e^x)/h. So I simplified this and got (e^x)* lim h->0 ((e^h)-1)/h. But I don't understand why and how ((e^h)-1)/h equals 1. Explain?

*January 5, 2016*

**Math**

find an equation for the line tangent to the graph of y=arccot(x) at x=1. I found that slope is -1/(1+x^2). I don't know how to evaluate arccot(1) to find y value.

*January 5, 2016*

**Science**

How much energy is needed to raise the temperature of 1500g of ice from -21.0 degrees Celsius to 113 degrees Celsius

*January 5, 2016*

**Math**

How do I use y=ne^kt formula?

*December 23, 2015*

**Math**

I know it's y=ne^kt. How do I use it? Quick answer.

*December 23, 2015*

**Math**

What is bacterial growth formula?

*December 23, 2015*

**math**

dwight made 13 shots at the basketball game on friday night and made a total of 30 points. she scored 5 more two pointers than three pointers. how many of each type of baskets did she make? Also make equations to help figure it out.

*December 20, 2015*

**Integers**

...

*December 15, 2015*

**science**

in addition to body structure and development, which of the following is used to classify animals? Speed, color, DNA or location

*December 14, 2015*

**Math**

I'm in sixth grade and I need help on 3(12w+8)+17+9w

*December 8, 2015*

**Algebra**

You travel with a boat 90 km downstream with the current in 6 hours and back upstream in 10 hours. Find the speed of the stream and the speed of the boat in still water, assuming that the motion is uniform.

*December 7, 2015*

**chemistry**

How to solve this problem in counting atoms 2 pb(CN)2

*December 6, 2015*

**mathmatics**

As I read this ((.8R)-5000).75=7500 solve for R, the initial amount. The amount spend is .2 of that R.

*December 5, 2015*

**calculus**

I just saw Prof Damon's response. I had the same thought, it was CalTech, Georgia Tech, or MIT. Review his outline first.

*December 5, 2015*

**calculus**

The satellite can see to the horizon. So along the surface, let the horizon be a distance r from the upcoming inmpact point. Then in basic geometry, one can reduce this to (d+y)^2=y^2+r^2 (with sherical trig, it is more complicated, but it at small d reduces to the simple ...

*December 5, 2015*

**Mathematics**

yes, of course. What you are ignoring is what units is the gradient. For instance 12375 nanometers/mile is a pretty level road. However, 12375meters/mile is a rather steep road.

*December 5, 2015*

**Physics**

The pressure goes from 290 to 102 kPa. V=800cm^3*290/102

*December 5, 2015*

**Physics**

see other post.

*December 5, 2015*

**chemistry**

what reaction?

*December 5, 2015*

**chem.**

how many g of Fe2O3 are produced if 3.00 g of Fe reacts?

*December 2, 2015*

**Algebra**

Mr. Pilgram needs fencing for his turkey coop. The perimeter is 240 yards. The length is 16 yards longer than the width. What are the dimensions? What is the area?

*December 1, 2015*

**Language arts**

the person above is right except 4 is C and 14 is D and these are only right for 12/19/16

*December 1, 2015*

**Chemistry**

A substance undergoes a first-order decomposition. After 40.0 min at 500 degrees C, only 12.5% of the original sample remains. What is the half-life of the decomposition? If the original sample weighted 243 g, how much would remain after 2 hours?

*November 30, 2015*

**math**

a radiator holds 5 gallons. how much of the 30% antifreeze solution should be drained and replaced with pure water to reduce the solution to 9% antifreeze?

*November 30, 2015*

**math**

The diagonal of a rectangular storage room is 4 yards long. If its length is 2 times its width, find the dimensions of the room.

*November 29, 2015*

**Social Studies, Ms. Sue, Reed, Check My Work**

I just took the test for connections 1. organize information.

*November 24, 2015*

**Social Studies**

b;saratoga

*November 23, 2015*

**science**

A cube of density 12kg/m cubed is placed in a Eureka tub and releases 0.40m cubed of water. A) What is the edge length of the cube? B) What is the mass of the cube?

*November 23, 2015*

**Chemistry**

anyone have a clue how to do this?

*November 21, 2015*

**Writing**

does anyone know the answers to the unit test, i'm stuck and need help

*November 20, 2015*

**Physics**

Woah

*November 18, 2015*

**Math**

Megan has 9 yards of fabric. If she uses 5/8 of the fabric to make a quilt, how much fabric does she have left?

*November 17, 2015*

**math**

A simple random sample of 800 individuals provides 250 Yes responses.

*November 17, 2015*

**Social Studies (Ms. Sue) Please Proofread**

100% Thank you correct

*November 17, 2015*

**health**

hello can anyone answer these question please?

*November 17, 2015*

**health**

PLEASE HELP 1. One of your friends plays video games for at least six hours each day and gets upset when he has to eat dinner with his family. This is a sign of? a. An anxiety disorder. b. A phobia c. Bipolar disorder d. An impulse-control disorder 2. A phobia is an example of...

*November 17, 2015*

**Science**

my answer would have to be (A) Mrs.Sue do you agree?

*November 13, 2015*

**Science**

here's the real question and then answers The search for identity usually occurs during? a) early childhood b) middle childhood c) late adulthood d) adolescence

*November 13, 2015*

**Chemistry**

how much heat is required to warm 225 grams of water from -50c to 200 c

*November 9, 2015*

**Algebra 2**

LIFE SAVER^

*November 8, 2015*

**Algebra**

How do I solve: Translate "y more than 4 is -36". Then solve the problem. Hope someone could help me out with this annoying question!

*November 8, 2015*

**Calculus**

In a right triangle, the hypotenuse is of fixed length of 15 units, one side is increasing in length by 4 units per second while the third side is decreasing in size. At a certain instant the increasing side is of length 9 units. Find the rate of change of the third side at ...

*November 7, 2015*

**Physics**

A golf ball has a mass of 0.05 kg. It is initially at rest, but after being struck by a golf club it is given a speed of 30 m/s. The club and the ball are in contact for 2 ms (.002 seconds).

*November 6, 2015*

**SCIENCE**

.) Iodine 131 is a radioactive waste product generated in nuclear power plants. It has a half life of 8 days. If 16 grams was released from the Fukushima power plant 32 days ago, how much is left now?

*November 4, 2015*

**math**

9 cm

*November 3, 2015*

**trig**

An airplane is flying in the direction 148° with an airspeed of u = 920 kilometers per hour. Because of the wind, its groundspeed and direction are v = 820 kilometers per hour and 140°, respectively (see figure). Find the direction and speed of the wind.

*November 2, 2015*

**math**

Breanne and Alison finished a 5 km fun run. Alison finished 400 m ahead of Breanne. Breanne ran at an average speed of 7.2 km/h. What was Alison’s time for the race if she ran at a constant rate for the whole race?

*November 1, 2015*

**HEALTH PLZ ITS OVERDUE**

The answers are A, B, B, B, and again, B. Trust me, I did the assessment and got everything right.

*November 1, 2015*

**Trigonometry**

Rusty has a photograph that is 8 inches wide x 10 inches long. She wants to enlarge the photograph to make a poster that is 3 feet wide. How long will the poster be?

*October 30, 2015*

**Math Can Someone explain me about this question**

where did they get the 11ft?

*October 28, 2015*

**Math Can Someone explain me about this question**

Danika has a board that is 4 yards long. How much needs to be sawn off to make the board 2 feet 8 inches long? A) 1ft 4in B)9ft 4in C)8ft 6in D)2ft 6in

*October 28, 2015*

**Vector resultant angles**

F1 has a magnitude of 9N acting due west, and F2 has a magnitude of 12 N. I know the magnitude is 15 but I don't know the angle and how to calculate it. I need a lot of help for calculating resultant angles.

*October 21, 2015*

**probability**

Ivan rolls a dice he the rolls it again what is the probability that the first roll will be odd or the sum will be odd?

*October 20, 2015*

**physics**

A duck waddles 2.3m east and 7.0m north. what are the magnitude and direction of the ducks displacement with respect to its original position?

*October 19, 2015*

**Physics**

A child stands on a balcony directly above a friend 5.00 m below. Each throws a ball toward the other with the same initial speed of 10.0 m/s. If each catches a ball at the same instant, which child threw a ball first? How much later was the second ball thrown?

*October 19, 2015*

**english**

how do i spell english?

*October 16, 2015*

**civics**

In every stage of these Oppressions We have Petitioned for Redress in the most humble terms: Our repeated Petitions have been answered only by repeated injury.

*October 15, 2015*

**Math**

Brock has a 2 L bottle of iced tea. He poured an equal amount of the iced tea into 8 containers. How many milliliters did rob pour into each container ?

*October 8, 2015*

**math**

The middle school band has 56 members. The high school band has 96 members. the bands are going to march one after the other in a parade. the director wants to arrange the bands into the same number of columns. What is the greatest number of columns in which the two bands can ...

*October 7, 2015*

**English assignment**

Is there any lying to friend articles? I can't find anything.

*October 6, 2015*

**English assignment**

I'm trying to introduce dishonesty around the world in my first sentence of this paragraph. Around the world, there are many cases of dishonesty being committed in the form of lying, cheating and stealing. Is this sentence correct? Is it a good sentence to use as an ...

*October 6, 2015*

**Pre Calculas**

7. For the function defined by: f(x)= {x^2, x<=1} {2x+1, x>1} a. evaluate f(0) 8. Solve the following system of equations algebraically. Verify your solution either graphically or by using matrices. 3x-y=0 5x+2y=22 9. Solve the following system of equations algebraically...

*October 6, 2015*

**English assignment**

We have to write a one page reflection on honesty, I need help. What are some real world situations in which this value is being violated? What actions does your conscience call you to take to respond to real world situations in which this value is being violated (knowing that...

*October 4, 2015*

**Physics**

ayy lmao

*October 3, 2015*

**Physics**

help

*October 1, 2015*

**Physics**

Two stones are thrown simultaneously, one straight upward from the base of a cliff and the other straight downward from the top of the cliff. The height of the cliff is 6.41 m. The stones are thrown with the same speed of 8.35 m/s. Find the location (above the base of the ...

*October 1, 2015*

**algebra**

i dont know

*September 30, 2015*

**math**

all multiples of 12

*September 29, 2015*

**Physics**

A car, moving along a straight stretch of high- way, begins to accelerate at 0.014 m/s2. It takes the car 23.2 s to cover 1 km. How fast was the car going when it first began to accelerate? Answer in units of m/s.

*September 24, 2015*

**physics**

12.254

*September 23, 2015*

**Vpe**

Estimate to 70+146 and got 300 her estimate reasonable explain

*September 21, 2015*

**Logarithm help**

Write each expression as a single logarithm I need help really fast. I have to finish this by today. log4^3 + 1/2log4^8 - log4^2

*September 19, 2015*

**Chemistry**

I am really lost with this. Calculate the amount of energy released in kJ/mol for the fusion reaction of two 1H atoms to yield a 2H atom and electron: 1/1H+1/1H→2/1H+0/1e The atomic masses are 0/1e (0.0005486 u), 1H (1.00783 u), 2H (2.01410 u), and 3He (3.01603 u). I ...

*September 19, 2015*

**Logarithm help**

Use logarithms for these questions After every 10 pages of painting, the ribbon in the dot matrix printer loses about 0.5% of its ink. A) What percent of the ink is left in the ribbon after printing 100 pages and 1000 pages B) write an equation which expresses the percent p of...

*September 18, 2015*

**Logarithm help**

Solve to the nearest thousandth. 5^1+x = 2^1-x

*September 18, 2015*

**Geometry**

What about the last three c by the 180???

*September 17, 2015*

so i divide it by 60?

*September 16, 2015*

**algebra**

The wheels of a moving bicycle have 27-inch diameters, and they are spinning at 200 revolutions per minute. How fast is the bike traveling in miles per hour? 27*π*200=16964.6 1mi=63360in 63360/16964.6=3.73 I am not sure if i did it right

*September 16, 2015*

**Math**

So 10.25=0.05n+0.1d+0.25q n=3d q=4*d+1 Substitute d and q to the top equation So 10.25=0.05(3d)+0.1d+0.25(4*d+1) Distribute 10.25=0.15d+0.1d+1d+0.25 Simplify 10.25=1.25d+0.25 10.25-0.25=1.25d --> 10/1.25=d--> d=8 plug 8 back into the equations 3*8=n --> n=24 4*8+1=q...

*September 16, 2015*

**Physics**

6.6m/s

*September 13, 2015*

**Elementary Mathematics**

2/5*7/10*9/10

*September 12, 2015*

**Physics**

115.256 cm

*September 11, 2015*

**Genetics**

Well educational parents providing environment that do not foster children learning Abilities.

*September 11, 2015*

**Math**

Solve this radical equation algebraically: 2x-5(sqrtx)-3=0

*September 11, 2015*