# Posts by bob

Total # Posts: 3,413

Maths
9.6

Maths
9.9 rounding to the nearest meter

Math
160

English-poem help
Is the poem I wrote a sonnet? My aunt has cancer, i don't know how, i sit and wonder why. I get mad at God and often say i hate him. I know its not his fault, but who am i supposed to blame, its all just bad shame. I walk to see her on her bed, in pain, holding on to her ...

Physics
A falling rock has a speed of 1.5 m/s. What is the velocity of the rock when it hits the ground 5 seconds later? Give the magnitude and direction

math
Hillary has to drive 225 miles in four and a half hours. What should her average speed be in order to arrive on time?

History

Algebra
10 days, because the x of the vertex is the maximum profit

math help pls pls pls
suck it math

Art World Culture
butthole

math
What is 6x to the third power+3x to the second power -9x

thank you

math
A deck of cards are shuffled 20 times. You are dealt 12 cards at random: what is the probability that all 12 cards are black? or what is the probability that all 12 cards are kings, queens or jacks

Science
Why are sedimentary rocks more useful than metamorphic or igneous rocks in establishing the relative ages of rock?

physics
butthole

socialstudies
Yes100

Physics
idk bro

algebra
34 - x - (x-1) 34 - x + x + 1 34 - 2x + 1 35 - 2x correct?

algebra
^ where do you get the 35 and 2x?

Algebra 1 (variable expressions)
6*(x-9)-5 When x=5

statistics
Scores: 5,2,4,2 ΣX-2 Σ(X-2) Σ(X-2)^2 can you show me a better idea how to solve this thanks

math
solve the following system of equations enter the x coordinate of the solution. Round your answer to the nearest tenth. 5x+2y=22 -2x+6y=3

Social Studies
it is United States 100%

Language Arts
b c a d c

Math
Find the largest $n$ so that $f(2) \cdot f(3) \cdot f(4) \cdots f(n-1) \cdot f(n) < 1.98.$

Please provide a short summary of your approach to business development and the methods that you use. this is not for school im just confused with the question

English
What is Anne Franks relationship with her parents compared to Peter VanDaan.

math
A CACTUS CASTS A SHADOW THAT IS 14ft 7in long. A gate nearby casts a shadow that is 5 ft long. Estimate the height of the cactus.

Math
Need help solving for x with work shown 2log6(4x)=0 Log2(x)+log2(x-3)=2

Chemistry
On the semi - reactions below is correct to say: Li + + 1℮- => Li. Eº = -3,04V. Au 3+ + 3℮- => Au. Eº = + 1,50V. Pb 2+ + 2℮- => Pb . Eº = - 0,13V. Ag + + 1℮- => Ag. Eº = + 0,80V. a) In the semi reaction Ag, the potential ...

Finance 101
Given the recent drop in mortgage interest rates, you have decided to refinance your home. Exactly five years ago, you obtained a \$150,000 30-year mortgage with a fixed rate of 10%. Today, you can get a 30-year loan for the currently outstanding loan balance at 7.5% interest. ...

Math
x^(1/3)(x+3)^(2/3). Doing curve sketching and cannot seem to figure out what the values are to fill out the chart(intervals-f''-behaviour). I can't seem to find the conacvity values, i don't think they exist. How should I prove that they don't exist? Or do ...

Math
so mainly i relly don't know so good luck

Math
Use prime number division to determine the Least Common Denominator: 30 = 2 x 3 x 5 60 = 2 x 2 x 3 x 5 90 = 2 x 3 x 3 x 5 Now write each term the maximum number of times it appears in each equation: 2 appears twice in the 60 minute equation, 3 appears twice in the 90 minute ...

Math
mainly i really don't know so goog d luck

Math
Esther drove to work at 45 miles per hour. Returned home at 30 miles per hour. If Esther spent a total of one hour commuting to and from work, how many miles did Ester drive to work in the morning?

Math
find the extrema of f(x)=x^(2/5), -3<=x<1. I find zero critical points, but the answer says there is a maxima and minima at 0 and -3.

ART 4 QUESTIONS PLZ HELP ASAP
Yay Sid is right I got 4/4

maths
a cube of material of side 3cm ( nearest mm) and mass 27 grams (nearest 10th of a gram) is placed into a bowl of deep water. Will the material sink or float? explain answer with suitable calcuations

Math
which points of f(x)=arcsin(sinx) are not differentiable? And what is the range of this function? How could I do this without graphing? I am just afraid that my test, which does not allow calculators, will have some question asking me to find this information. Also, when are ...

English
thank you

English
how can i improve thesis statment?

Language Arts
No I defiantly used his answers and got them all wrong.

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

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...

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 ...

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?

geometry
thanks

geometry
how can you find the geometric mean?

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??

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?

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...

Science
does any one know

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...

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

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?

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.

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

Math
How do I use y=ne^kt formula?

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

Math
What is bacterial growth formula?

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.

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

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

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.

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

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

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

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 ...

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.

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

Physics
see other post.

chemistry
what reaction?

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

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?

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?

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?

math
9 by 6

Math
24

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.

Social Studies, Ms. Sue, Reed, Check My Work
I just took the test for connections 1. organize information.

Social Studies
b;saratoga

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?

Chemistry
anyone have a clue how to do this?

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

Physics
Woah

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?

thx you a great person

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

100% Thank you correct

health

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...

Chemistry
its supposed to be C+D-B-C

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

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

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

Algebra 2
LIFE SAVER^

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!

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 ...