Tuesday
February 9, 2016

Posts by peter

Total # Posts: 948

Biology
I go with B. It makes more sense that way. DNA never leaves a cell only messenger RNA does.
December 11, 2011

math
suppose you deposited $3000 of earned income into an IRA, you can earn an annual interest rate of 8%and you are in a 40% tax bracket (Note:interest rates and tax brackets are subject to change over time, but some assumptions must be made to evaluate the investment) Also, ...
December 11, 2011

maths
find the distance in kilometers traveled by an areoplane moving at 150km/h for 50minutes.
December 11, 2011

english
Thank you Writeacher.
December 10, 2011

english
I have to find three or four nouns, adjectives, adverbs and verbs from a book. Please can you tell me if I am right? noun - Stanley, lizard, toothbrush. adjectives - sweet, fresh onions. The answer sweet,fresh. He suddenly realised where he'd seen the gold tube before. The...
December 10, 2011

math
A certain kind of bacteria doubles in quantity every hour. At midnight two nights ago. only two of these bacteria were in a jar. At midnight last night, the jar was full. At what time was the jar half full?
December 9, 2011

science
My question is ' what do you think if we lived in a world without any plants?' I have tried typing this in a search engine and it came up with nothing. Please could you help give me a website. Thank you.
December 8, 2011

college physics
I don't know where to begin with this question. Could someone help me please? A rod of mass 4.1 kg and length 1.6 m hangs from a hinge as shown in the figure below. The end of the rod is then given a "kick" so that it is moving at a speed of 5 m/s. How high will ...
December 2, 2011

math
(1A) Write the 11-digit number that has a 2 in the ones place,1 in the tens place,a digit in the ten-thousands place that is twice the digit in the ones place,the smallest odd digit in the billions place, 6 in the tenths place, and 0 in all the other places. (1B) How did you ...
November 30, 2011

3 grade math
12+6=18
November 30, 2011

Algebra 2
Show that for any complex number z, |z| = |-z|. (Hint: Let z = a + bi.)
November 30, 2011

math
ben has finished homewok during holiday.he does 2/3 of remaining question each days. after 4 days, 4 question are left .how many question he all together to do ?
November 27, 2011

Physics
A ball, of mass 0.3Kg, is held on the inside of a smooth hemispherical bowl at a height 0.15 m above the base. It is then released. Assuming there is no friction, the acceleration due to gravity, g, is 10 m/s2 and the potential energy is zero at the base of the bowl - What is ...
November 22, 2011

Math61
R is bounded by Y=2x-x^2 and the x-axis. Find the centroid of R. Sketch the region.
November 16, 2011

physics
Two forces, 422 N at 24 and 278 N at 29 are applied to a car in an effort to accelerate it. mass of the car is 3000kg Find the resultant of these two forces. Answer in units of N Find the direction of the resultant force (in relation to forward, with counterclock- ...
November 12, 2011

Biology
Which functional group is most likely to be responsible for an organic molecule behaving as a base (-OH donator / H+ acceptor)? A. Phosphate B. Amino C. Hydroxyl D. Carbonyl E. Carboxyl
November 6, 2011

Biology
If a protein's primary structure is predetermined or directed by a "source." what might this "source" be?
November 6, 2011

Biology
There are 20 amino acids that cells use to build the numerous amounts of proteins that are essential for life. If a protein molecule consisted of 100 amino acids, how many combinations are possible? What is the probability that out of the total possible combinations of the 100...
November 6, 2011

event driven programming
8. Write a visual basic program that accepts basic pay, allowances and tax of ten employees computes gross pay and net pay of each of the employee.
November 2, 2011

Algebra 2
When x² - 3x + 2k is divided by x + 2, the remainder is 7. Find the value of k. Use synthetic division to do so.
October 28, 2011

math
Joel and jacob are brothers. This year both of their ages are prime numbers. Last year both of their ages were composite numbers.Both of their ages will be composite numbers again over the next three years. If joel and jacob are both teenagers, how old are they now?
October 27, 2011

Algebra 2
When two rational expressions are divide, the quotient is 5x² + 3x + 12 + 7/(x + 5. What are the two polynomials?
October 27, 2011

Algebra 2
Please use the long division method for this problem.
October 27, 2011

Algebra 2
(4a³b + 5a²b² + a⁴ + 2ab³)÷ (a² + 2b² + 3ab)
October 27, 2011

Science (urgent)
Assuming you meant an arrow instead of a "Reserved" sign, it should be B, Product. The substrate is something being acted upon in a reaction (I'm assuming this is for a biology/biochemistry class, so in that case the substrate is what's being acted on by the ...
October 26, 2011

physics
I'm assuming you're referring to kinetic friction here, in either case (static or kinetic friction) however the following method is able to find the answer. Friction=mass*g*friction constant In this case the force of friction is equal and opposite to 20N, so Friction...
October 26, 2011

physics
Acceleration is equal to change in velocity over time. In this case the velocity is constant, so the change is 0. 0 divided by anything is 0, so there is no acceleration (a=0 /s^2)
October 26, 2011

Physics
You just need to calculate Jane's kinectic energy before she grabs the vine (.5mv^2). This will be equal to her gravitational potential energy (mg*height) at the top of her swing. .5mv^2=mgh -cancel the mass on both sides .5v^2=gh 19.22=9.8h h=1.96
October 24, 2011

physics
objects of masses m1=4 kg and m2=9kg are connected by a light string that passes over a frictionless pulley. the object m1 is held at rest on the floor and m2 rests on a fixed incline of delta=40 degrees. the objects are released from rest and m2 slids 1.00 m down the ...
October 23, 2011

physics
A falling skydiver has a mass of 123 kg. (a) What is the magnitude of the skydiver's acceleration when the upward force of air resistance has a magnitude that is equal to one-fourth of his weight? 7.35 m/s^2 (b) After the parachute opens, the skydiver descends at a ...
October 21, 2011

Physics
A box is sliding up an incline that makes an angle of 12.0° with respect to the horizontal. The coefficient of kinetic friction between the box and the surface of the incline is 0.180. The initial speed of the box at the bottom of the incline is 1.30 m/s. How far does the ...
October 21, 2011

Algebra 2
Factor. -16 + 17(5-y²)-(5-y²)² and [x + y + 1][x² - x(y + 1)+(y + 1)²
October 20, 2011

Algebra 2
Factor. (y-1)⁴ - (y-1)²
October 20, 2011

Algebra 2
Factor.
October 20, 2011

Algebra 2
1/16(x)^3a + 1/2(y)^(6a)(z)^(9b)
October 20, 2011

Algebra 2
Factor. 2x⁴ + x³ + 2x² + 4x - 24
October 20, 2011

physics
fuk u
October 19, 2011

Algebra 2
Solve for x. x³ + ax² - a²x - a³ = 0
October 18, 2011

Algebra 2
Solve for x. 2x² - 5bx + 4cx - 10bc = 0
October 18, 2011

simple math
1:3 and 1:2 Which one is a larger ratio? What does it mean for a ratio to be larger or smaller? Thank you.
October 18, 2011

English
Can anyone check this text and if there are any mistakes, fix it? I am writing to complain about the advertisement for your new game. I just played the game and then i realised that the advertisement is misleading. You say there are big cash prizes and averyone can win it. In ...
October 16, 2011

physics
can i get thé answer please
October 12, 2011

math
a kid with a baseball cap is playing catch with himself by trowing a ball straight up how fastdoes he throw the ball if it comes back to his cap in0.8 seconds later
October 9, 2011

Statistics
Calculate the mean and standard deviation of the probability distribution created by rolling a dice. Either show work or explain how your answer was calculated.
October 9, 2011

Algebra 2 (Diophantine Equations)
Solve 5x + 12y = 47 using Diophantine equations.
October 7, 2011

math
A pie plate measures 8 inches across the bottom. What is the area of the bottom of this pie plate?
October 6, 2011

Algebra 2 (Linear Diophantine Equation)
31x + 8y = 180
October 6, 2011

Algebra 2 (Diophantine Equation)
7x + 16y = 225 Solve using Diophantine equations.
October 6, 2011

Algebra 2 (Diophantine Equations)
Find all positive integer solutions for 13x + 9y = 190 using Diophantine equations.
October 5, 2011

Algebra 2
At a county fair, adults' tickets sold for $5.50, senior citizens' tickets for $4.00, and children's tickets for $1.50. On the opening day, the number of children's and senior's tickets sold was 30 more than half of the number of adults' tickets sold. ...
October 5, 2011

Algebra 2
At a county fair, adults' tickets sold for $5.50, senior citizens' tickets for $4.00, and children's tickets for $1.50. On the opening day, the number of children's and senior's tickets sold was 30 more than half of the number of adults' tickets sold. ...
October 5, 2011

Algebra 2 (Linear Programming)
Part A requires 4 hours per unit on a lathe and 3 hours per unit on a milling machine. Part B requires 2 hours per unit on a lathe and 5 hours per unit on a milling machine. 52 hours are available on the lathe and 60 hours are available on the milling machine. If the profit ...
October 5, 2011

Algebra 2 (Distance Problem)
A train leaves Union Station for Central Station, 216 km away, at 9 A.M. One hour later, a train leaves Central Station for Union Station. They meet at noon. If the second train had started at 9 A.M., and the first train at 10:30 A.M., they would still have met at noon. Find ...
October 5, 2011

math
decimal number patterns rules 4.8, 9.6, 8.9, 17.8, 17.1
October 4, 2011

Algebra 2 (Linear Programming)
A bicycle builder makes two models. The basic model requires 2 hours of frame construction, 4 hours of assembly, and 1 hour of finishing. The deluxe model requires 3 hours of frame construction, 3 hours of assembly, and 2 hours of finishing. Each day 36 hours are available for...
October 4, 2011

Algebra 2 (Linear Programming)
The Carbon coal company has 2 mines, a surface mine ad a deep mine. it costs $200 per day to operate the surface mine and $250 to operate the deep mine. Each mine produces a medium grade and a medium-hard grade coal, but in different proportions. This surface mine produces 12 ...
October 4, 2011

Algebra 2 (Linear Programming)
An airline will provide accommodations for a minimum of 2000 first-class, 1500 tourist, and 2400 economy-class passengers. Airplane P-1 costs $12,000 per miles to operate and can accommodate 40 first-class, 40 tourist, and 12 economy-class passengers. Airplane Q-2 costs $10,...
October 4, 2011

Algebra 2
A bicycle builder makes two models. The basic model requires 2 hours of frame construction, 4 hours of assembly, and 1 hour of finishing. The deluxe model requires 3 hours of frame construction, 3 hours of assembly, and 2 hours of finishing. Each day 36 hours are available for...
October 4, 2011

Algebra 2
Is this system of equations inconsistent? Is it dependent? x = 3y + 4 6y = 2x - 6
October 3, 2011

math
If it is the whole entire top over 2 then its different. -> Multiply by 1/2, which will cancel out the denominator. Then it will leave you with: 9x + 6 - 4x = 8 5x + 6 = 8 5x = 2 x = 2/5
October 3, 2011

math
* Multiply 2 with 8 to get rid of the 2. 9x + 6 - 4x = 16 5x + 6 = 16 - 6 = -6 _________________ 5x = 10 x = 2
October 3, 2011

Algebra 2
Solve using linear combinations. x - 5y = 6 3x + 4y = 18 What are linear combinations?
October 3, 2011

math
"I think we can say that the father is 24 years older than John, regardless of how old they are. If J represents John's age now, then 3J represents John's father's age. This is equal to J+24, so we set an equation 3J = J + 24 2J = 24 J = 12, 3J = 36 John is 12...
October 2, 2011

Algebra 2
Shouldn't it have 4 points due to 4 vertices?
October 2, 2011

Algebra 2
Find the coordinates of any vertices formed. 3x + 4y ≥ 12, 5x + 6y ≤ 30, and 1 ≤ x ≤ 3. I tried graphing this, which formed a parallelogram, but it was hard to find eyeball vertices.
October 2, 2011

Algebra 2
How many set solutions are there for this problem 33x + 103y = 6526? The solution cannot contain negative integers or decimals and fractions.
September 30, 2011

math
This is a riddle, and I'm supposed to find a 5-digit number from it..... My thousand's digit is the first that is perfect, but if you're not happy with that, it's also the product of the first two primes. My units digit is the odd of those two primes, and if ...
September 30, 2011

Diophantine Equations (Algebra 2)
A box contains two sizes of bolts. The small size weighs 33 grams. The large size weighs 103 grams. The total weight of the bolts is 6526 grams. How many of each size are there? Can you write and solve it with Diophantine Equations.
September 30, 2011

English
"The Scarlet Ibis" interpretive essay help. Directions: James Hurst, the author, makes the observation that "pride is a wonderful, terrible ting, a seed that bears two vines, life and death." These words are central to the meaning of the story. The phrase ...
September 30, 2011

Math
i think 82 is the answer.
September 30, 2011

Algebra 2
The tens digit of a two-digit positive integer is 2 more than three times the ones digit. If the digits are interchanged, the new number 13 less than half the given number. Find the given integer. (Hint: Let x = tens-place digit and y = ones-place digit, then 10x + y is the ...
September 30, 2011

math
Tony and Tom are brothers.This year both of their ages are prime numbers. Last year both of their ages were composite numbers. Both of their ages will be composite numbers again over the next three years. If Tony and Tom are both teenagers, how old are they now?
September 29, 2011

math/science
this is the only information we have been given. hope someone can help.
September 29, 2011

math/science
Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
September 29, 2011

biology
Please can you explain how to do the following: a) a non-smoker with low blood pressure has a plasma chloesterol concentration of 5mmol per litre. Over a period of time this concentration increases to 8mmol per litre. By how many times has this risk of heart disease increased...
September 28, 2011

physics
A diver leaves the board traveling at 3.5 m/s at an angle of 75º with respect to the horizontal. What is her speed when she hits the water, 3 meters below?
September 27, 2011

math
A cube measures 2 meters on each side. What is the volume of the cube?
September 25, 2011

Math
simplify (8 – i) – (4 – i) using Complex Numbers
September 7, 2011

algerbra
if 16-b<7 then, a) b < or equal to 8 b) b > 9 c) b < or equal to 7 d) b > or equal to 7
September 4, 2011

chemistry
Q(H20)=100g x 4.18 JK-1g-1 x 30K =100 x 4.18J x 30 (Since the rest cancel each other out) Wallah
September 3, 2011

geometry
Funny, the REA's testware has this same question, ceiling dimensions 12/9 which is 108 - the light fixture diameter 2 = area 3.14=104.86 sq ft, agreed. divided by 16 sq ft per gallon = rounded 7 gallons their answer choices: $44.75 $50.20 $38.50 $42.99 am i crazy or is it ...
August 24, 2011

Algebra II
"The smallest integer divisible by 10 and 32 is 160, and the smallest integer divisible by 6 and 20 is 60. The difference between them is 100." - Princeton Review
July 26, 2011

Algebra II
I think it's C.
July 26, 2011

Pre-Calc
Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6
July 25, 2011

Occ
(x^2 +4)y = 2x
July 25, 2011

Math
Let cis Θ = cos Θ + i sin Θ. Let z1 = 3 cis 25 and let z2 = 4 cis 115 Find z2^6
July 25, 2011

geometry
You can't find out the scale factor if you aren't given any numbers for the sides of the triangles.
July 21, 2011

Algebra
If A + B = 12, and B + C = 16, What is the value of A + C? A. -4 B. -28 C. 4 D. 28 E. The answer cannot be determined from the given information.
July 13, 2011

math
each side of a square painting id 5 ft long.what is the painting area.what is the painting perimter?
June 20, 2011

algebra
use 2 as the base!, 2 raise to the power of n, where n is the number of elements in a set.
June 11, 2011

algebra
whats the fastest and most easiest way to find all the subsets in a given set?
June 11, 2011

Chemistry
How do you balance the equation when citric acid is added to NaOH?
June 8, 2011

Geometry
A solid is composed of a cube with side length 6 meters and a hemisphere with diameter 6 meters. Find the volume of the solid.
June 1, 2011

Geometry
A rectangular prism with 2 little square bases of a radius of 1m. It's height or rectangular length is 5m. Please help me find the surface area. The answer should be less than 50m².
June 1, 2011

Mathematics
Plug in d. D = the number of minutes the practice drills last "30 minutes are spent on practice drills." 20 + 30 + 10 = 60 minutes.
June 1, 2011

Trigonometry
Solve SSA: B= 12.1 degrees b= 16 a= 23.9
May 30, 2011

Trigonometry
Use Heron's formula: a=46 b= 52 c= 67
May 30, 2011

Trigonometry
verify the identity: 1-cos^2x/1-sinx= -sinx
May 30, 2011

U.S. History
True or False? "The rebels are our country men again." Is a quote that is referring to the Emancipation Proclamation.
May 25, 2011

U.S. History
True or False? General Sherman's 60 miles path of destruction was from Atlanta, Georgia to Savannah, Georgia?
May 25, 2011

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