Sunday
April 20, 2014

Posts by kira


Total # Posts: 63

algebra
Medical research indicates that the risk of having a car accident increases exponentially as the concentration of alcohol in the blood increases. The risk is modeled by R=6e^12.77x Where x is the blood alcohol concentration and R, given as a percent, is the risk of having a ca...

algebra
How long, to the nearest day, will it take $25,000 to grow to $500000 at 9% annual interest compounded monthly?

algebra Word problem
what interest rate is required for an investment subject to continuous compounding to triple in 15 years? A= Pe^rt ?

algebra
write the equation in standard form: 2x^2-12x+5

Science
my teacher said it dissolves

Math
2-3/5 3-3/6

Math
how do you subtract whole numbers into fractions?

phy
An emphysema patient is breathing pure O2 through a face mask. The cylinder of O2 contains 0.20 ft3 of O2 gas at a pressure of 2200 lb/in2. (a) What volume would the oxygen occupy at atmospheric pressure (and the same temperature)? ft3 (b) If the patient takes in 8.0 L/min of ...

phy
An emphysema patient is breathing pure O2 through a face mask. The cylinder of O2 contains 0.20 ft3 of O2 gas at a pressure of 2200 lb/in2. (a) What volume would the oxygen occupy at atmospheric pressure (and the same temperature)? ft3 (b) If the patient takes in 8.0 L/min of ...

physics
Calculate the number of H2O molecules in a human body of mass 50.6 kg. Assume that, on average, water makes up 62% of the mass of a human body. (Use 1.0 u for the atomic mass of hydrogen, and 16.0 u for the atomic mass of oxygen.)

phy
Doppler ultrasound is used to measure the speed of blood flow. If the speed of the red blood cells is v, the speed of sound in blood is u, the ultrasound source emits waves of frequency f, and we assume that the blood cells are moving directly toward the ultrasound source, the...

phy
At a factory, a noon whistle is sounding with a frequency of 484 Hz. As a car traveling at 77 km/h approaches the factory, the driver hears the whistle at frequency fi. After driving past the factory, the driver hears frequency ff. What is the change in frequency ff − fi...

Chemistry - DrBob Help!
i have now idea but dr.bob knows he is nice

Math
The inner diameter of a piston is normally distributed with mean of 10 cm and standard deviation 0.03cm a)below what value of inner diameter will fall fifteen percent of the piston rings?

chemistry
the molar mass of aluminum will be on your periodic table.

science
why are some foods spicyer than others?

Physics
a helicopter, travelling horizontally at a constant velocity, is 82m above ground. The pilot prepares to release a package intended to land on the ground 96m horizontally ahead. no air resistance. He lets the package drop. what is the velocity of the helicopter?

Physics
A package of dishes (mass 50.0 kg) sits on the flatbed of a pickup truck with an open tailgate. The coefficient of static friction between the package and the truck's flatbed is 0.330, and the coefficient of kinetic friction is 0.230. (a) The truck accelerates forward on l...

chemistry
What is the density of a sphere with a radius of 12.7 meters and a mass of 285 kilograms?

physiology/ anatomy
I'm doing a lab about osmosis/ diffusion. We put a 2 molar solution of NaCl into a dialysis bag and submerse the bag in water, weighing the bag after 15 minute increments for an hour. I need help explaining why the weight of the bag would fluctuate (EX. 6 grams -> 7 gra...

Calculus AB
But I get the general idea. I just write 1/x as x^-1 and differentiate that. Makes sense, thanks!

Calculus AB
The 1/x was only factored out of the first two terms, not out of the 20pi(x^2)

Calculus AB
Here I'll write it again but distribute the 1/x so you can see it better. f(x) = (27,000,000/pix)+(6,750,000/x)+20pix^2 Does that help?

Calculus AB
Find the derivative of f(x) = 1/x(27,000,000/pi + 6,750,000) + 20pix^2 Can someone help me with this? Thanks.

Calculus
I need to integrate ((e^-x)^2 - (-ex)^2)dx Can someone help?

reimbursement metodologies
im currently writing a paper on this subject but have no more than the opening and first body paragraph im supposed to go into detail about how it works and the history but am having problems finding alot of information. can anyone help me out???

World history
The answer is B

Economics
You are considering quitting work for two years to earn an MBA. Your current job pays $25,000 per year (after taxes), but you could earn $55,000 per year (after taxes) if you had a MBA at Southern University. Tuition is $10,000 per year and the cost of an apartment near campus...

Grade 12 Data Management
A baseball player has had 14 hits in 60 times at bat in the last 20 games. How many hits does the batter need in her next ten at bats to increase the probability of her getting a hit to 0.300?

math
a linesman in the NFL is most likely to weight between 250 and 300 pounds. of the four players below, which most likely would be a linesman? player A weights 70 kilograms player B weights 90 kilograms player C weights 125 kilograms player D weights 200 kilograms

math
a carpet measures 7 meters 3 decimeters in length and 4 meters 2 decimeters in width. what is its area in square meters?

math
3/12 or 1/4

earth science
why are warm and cold fronts ussually weaker in the summer?

earth science
what kind of air mass weather is likely to follow the passing of a warm front?

geometry
the lengths [in inches] of two sides of a regular pentagon are represented by the expression 5x-27 and 2x-6 . fined the length of a sied of the pentagon.

7th grade
How do you interview a character in a book?

9th grade-Math
How do you solve this equation? 35x^2-49x __________ -7x

math
The bumper car ride at the state fair has 3 red cars, 4 green cars, and 2 blue cars. Joe is first in line for the ride and is assigned a car at random. Bill in next in line and is randomly assigned a car. What is the probability that both joe and bill will drive a red bumper c...

water cycle
ice

water cycle
ice

Physics
How fast does a car have to accelerate to go from 10.0 m/s to 30 m/s in 125 meters?

CHem help pkz
Bond enthalpy is the energy required to break a mole of a certain type of bond. O=O = 495 kj/mol S-F = 327 kj/mol S=O = 523 kj/mol Use average bond enthalpies to estimate the enthalpy delta H (rxn) of the following reaction: 2SF4 + O2 ---- 2OSF4 Express your answer numerically...

Interview
can you give me some sample questions they might ask?

Interview
what should I wear?

Interview
i have an interview tomorrow about the public issues in ohio and the future of ohio how do i go about talking/appearing/etiquette?

math
a linesman in the NFL is most likely to weight between 250 and 300 pounds. of the four players below, which most likely would be a linesman?

MATH
X= 92]96]100]104]108 Y=23]24]25]26]27 WHAT IS THE VALUE OF Y WHEN X IS 68?? IF Y=X-19, WHAT IS THE VALUE OF X WHEN Y= 34

math
THANX THAT ANSWER WAS WELL EXPLAINED AN EVERYTHING

math
let s= the sum of all even numbers from 2 to 10 {including 2 and 10} Let t= the sum of all odd numbers from 1 to 9 z{including 1 and 9.. find s-t

math
how many whole numbers less than 100 does the digit 9 appear at least once??

math
how can you determine whether a design has rotational symmetry? if a design has a rotational symmetry, how many can you find the angle of roation??

math
how can u determine whether a design has a reflectional symmetry??

math
DESCIBE THE TOOLS AND THE PROCESS YOU WOULD USE TO CREATE A DESIGN WITH REFLECTIONAL SYMMENTRY FROM A BASIC DESIGN ELEMENT..

math
jack an joan painted 3 houses in 12 days.At that rate, how many houses can they paint in 28 days??

MATH
JACK AND JOAN PAINTED 3 HOUSES IN 12 DAYS. AT THAT RATE, HOW MANY HOUSES CAN THEY PAINT IN 28 DAYS?

MATH
IN HOW MANY WHOLE NUMBERS LESS THAN 100 DOES THE DIGIT 9 APPEAR AT LEAST ONCE?

science
I'm studying minerals..I understand that if molten rock cools slowly undergound, then large mineral cystals start forming. AND if that rock cools quickly at the surface, small cystals form. My ? is ..sometimes rock has both large and small mineral crystals ..how can that b...

social studies
In most countries, what is the main responsibility of the government to create?

pre-cal
find the value(s) of x for which f(x)=g(x). f(x)=x^4-2x^2,g(x)=2x^2

Chemistry
1.) How many grams of 2-propanol are expected from the complete reaction of 672 g of propene? 2.)How many moles of propane are expected from the complete reaction of 82.8 g of propene? 3.)How many grams of propane are expected from the complete reaction of 101 g of propene? 4....

Calculus AP - Volume of Revolution
Hi. I have a few calculus problems that I have to do using the washers and shell method to find out what the volume of the graph rotated is. I'll post one question at a time with my work. The problem is, I should be getting the same answer for the problem with the shell me...

Math
5.5

Physics Problem - Please Help!
Okay, here's the problem: During a football game, the quarterback rolls out to his right with two huge linebackers in close pursuit. An instant before the linebackers bury him at the 50 yard line (46-m), he releases a towering pass down the sideling. The ball sails toward ...

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