Friday
July 25, 2014

Posts by Britt


Total # Posts: 156

Physics
The piolt of an airplane wishes to fly due north, but there is a 65-km/h wind blowing toward the east. in what direction should the pilot head her plane if its speed relative to the air is 340 km/h?

Physics
A 920kg car is 65m from a concrete barrier, travelling at 125km/h, when the driver notices and slams on the breaks. The frictional force acting on the car is 8500 N. Is ther driver able to stop the car before hitting the barrier.

chemistry
A sample of barium contains 3.20g of barium. How many atoms of barium are contained in the sample?

Calculus
State the domain and range for each: f(x) = 4x + 1 and g(x) = x^2 f(x) = sin x and g(x) = x^2 - x + 1 f(x) = 10^x and g(x) = log x

Calculus
Math questions, please help me? :(? Find the composite functions f o g and g o f for the given functions. f(x) = 10^x and g(x) = log x State the domain and range for each: f(x) = 4x + 1 and g(x) = x^2 f(x) = sin x and g(x) = x^2 - x + 1 f(x) = 10^x and g(x) = log x If f = {(-2...

Chemistry
PV=nRT (1)(x)= (.250)(0.0821)(523) 1x= 10.73

calculus
F(x)= log_3 (1-5x) F'(x)=

world history
how did spain acquire her american empire?

Algebra 1
SO HOW DO YOU GET 1/2 FORM THAT?

Algebra 1
the quadratic formula is -b+-radical b^2-4ac/a

Algebra 1
So technically there would be no solution right?

Algebra 1
how do you get 1/2 as a solution?

Algebra 1
because the answer has got to be a real number which is not a negative number

Algebra 1
solve: log8(w-6)=2-log8(w+15) note: the 8 is to be little at the bottom right corner of log

Test prep
solve: log8(w-6)=2-log8(w+15) note: the 8 is to be little at the bottom right corner of log

Algebra
Write expression as the logarithm of a single expression or number: ln(3x+2)+ln(x+4)

Math prep
1). Using the function: y=y0,(.90)^t-1. In this equation y0 is the amount of initial dose and y is the amount of medication still available t hours after drug is administered. Suppose 20mg of the drug is administered. How long will it take for this initial dose to reach 50mg? ...

math
the y0 should actually be y with a little 0 at the bottom right corner and as i said from the equation it is the amount of initial dose. Plus the initial dose is 200mg not 20 sorry. so how long would it take to get from 200mg to 50mg?

math
1). Using the function: y=y0,(.90)^t-1. In this equation y0 is the amount of initial dose and y is the amount of medication still available t hours after drug is administered. Suppose 20mg of the drug is administered. How long will it take for this initial dose to reach 50mg? ...

physics
A hypodermic needle is 2.98 cm in length and 0.28 mm in diameter. What pressure difference between the input and output of the needle is required so that the flow rate of water through it will be 1 g/s?

Fifth grade English
What is the plural form of staff? Not sure if it should be staff or staffs. Thank you for helping. Britt

5th grade English
What is the simple predicate in this sentence? The lion is nicknamed the King of the Beasts. Would it be "is" or would it be "is nicknamed"? Thanks!

9th grade algebra/Ms Sue
.78 to nearest hundred

algebra
-5/8- 3/4=

chemistry
the rusting of iron is represented by the eqquation 4Fe + 3O2 --> 2Fe2O3 if you have a 1.25-mol sample of iron, how many moles of Fe2O3 can be made?

history
How did George Kennan’s containment doctrine change during the Truman, Eisenhower and Kennedy administrations? Which president was the most successful in containing Communism? HELP!!!

chemistry
The electron pairs in a molecule of NH3 form a tetrahedron. Why does the NH3 molecule have a trigonal pyramidal shape rather than a tetrahedral shape? Explain your answer. PLEASE HELP

Calculus
Total cost to manufacture q microwaves a day is C(q)=3q^2+q+48.What level of product gives the least average cost and Can a microwaves be produces for less than $30?

history
How was the civil rights movement of the 1950s and 1960s a continuation of the Reconstruction-era struggle for blacks to achieve equality?

history
How was the civil rights movement of the 1950s and 1960s a continuation of the Reconstruction-era struggle for blacks to achieve equality?

chemistry
Based on electronegativity values, which bond has the highest degree of ionic character: H--S Si--Cl Cs--Br?

science
How do you figure out if acceleration occurred. What would the equations look like?

science
you are riding your bike at 9km/h. ten minutes later; your speed is 6km/hr.

science
91km/h

science
What is the average speed of a car that travels 320km in 3.5 hours?

chemistry
Ammonia, NH3, can be made by reacting nitrogen with hydrogen. N2 + 3H2 = 2NH3 How many moles of NH3 can be made if 7.5 moles of H2 react with enough N2? Please help!

University Physics
Building A and Building B are 30m away from each other, on the 4th floor; 35m high, someone has set up a slingshot from the window on the 4th floor of building A and is trying to sling a balloon into the window directly across from them in building B. the balloon weights 1 kg,...

history
french and indian war

history
Discuss the importance of landscape in crafting battle strategy for both the French and the English. Help please! talking in general.. no one specific battle

calculus
Solve for x: 2x=ex+1

calculus
Solve the equation 14=65(19)x for x using logs.

trigonometry
Use De Moivre’s Theorem to simplify each expression. Write the answer in the form a + bi. {1 - i(/3)}^4

accounting
Christy Burch and Myung Lim, partners, compared their current income statement with their income statement of a year ago. They noted that sales were 12.0% higher than a year ago. They also noted that the total expenses were 20.0% higher than a year ago. What type of analysis s...

trigonometry
Find a complex number a + bi such that a^2 + b^2 is irrational. Justify and explain your reasoning.

trigonometry
Find a complex number a + bi such that a^2 + b^2 is irrational. Justify and explain your reasoning.

english
The Awakening, by Kate Choplin, sorry

trigonometry
okay!

trigonometry
ohh, i didnt realize! thankyou :)

trigonometry
{1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x solve using identities?

trigonometry
Use identities to simplify each expression. 1) (sin2t) (cos5t) + (cos2t) (sin5t) 2) {1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x

trigonometry
1) (sin2t) (cos5t) + (cos2t) (sin5t) 2) {1/(sec x - 1)} - {1/(sec x +1)} = 2 cot^2 x

trigonometry
A sheet metal worker constructed a triangular metal flashing with sides of 6 ft., 5 ft., and 3 ft. If he charges $2 per square foot for this type of work, then what should he charge? Do not use Heron’s formula. Justify and explain your reasoning.

math
I have spent hours trying to do these, help! Use the given information to solve the triangle. 1) C = 145 degrees, b = 4, c = 14. 2) A = 150 degrees, C = 20 degrees, a = 200.

trigonometry
Use the given information to solve the triangle. 1) C = 145 degrees, b = 4, c = 14. 2) A = 150 degrees, C = 20 degrees, a = 200.

English
Which of the following are characteristics of allegory? A. Immitation B. Humor C. Didacticism D. Spiral Plot C. Music

math
what is the sum of radical x- 1 and (x-1)^2 when x= 5?

calculus
The volume V of a cylinder is computed using the values 9.8 \text{m} for the diameter and 3 \text{m} for the height. Use the linear approximation to estimate the maximum error in V if each of these values has a possible error of at most 8 \%.

Precalculus
Can an even degree polynominal have exactly one x intercept?

Math
Find cos(theta) if (-15, 8) is a point of the terminal side of theta.

physical science
can water dissolve polar molecules or nonpolar molecules

Math
Rectangle with a diagonal length oh 26m and height of 10m

Math
What is the area of a square with a diagonal length of 15 times the square root of 2?

algebra
x squared-4x-5 your factoring each expression.

Math
Find (f-g)(-3) when f(x) = x + 3 and g(x) = sq. rt. x - 7

Science
Identify two different types of green power. Identify a disadvantage and advantage of each type. Thanks Britt

chem
I did this same problem on Sapling Learning and I can confirm Anonymous's answer is correct. Now, if only someone can explain why it makes sense. Is it just comparing pKa values?

psychology
Explain how influences from each of the 4 levels of the ecological perspective have affected your development thus far (8 pts). List the level and then write a few sentences explaining how it has affected you.

Psych
I've seen adolescents with such a strong sense of their own importance, especially in sports, that they don't appear to care about anyone or anything else. What do you think?

Social Studies
The First Amendment does not guarantee absolute freedoms or rights Why?

calculus
it's x=pi.

calculus
what is the slope of the curve y=tan(6x^2) when x=ð

English
THe meaning would probably be to give a chance. To give it a try! I am going to go too a english club. Hope I helped!

Chemistry
If the pressure on a 1.04 L sample of gas is doubled at the constant temperature, what will be the new volume of the gas?

Chemistry
668= 26.7(2.42)(X-32.5) ?

Physics
A cheetah is hunting. Its prey runs for 2.56 s at a constant velocity of +10.02 m/s. Starting from rest, what constant acceleration must the cheetah maintain in order to run the same distance as its prey runs in the same time?

statistics
suppose that 52percent of us sleep between 7 and 8 hours a day .find the decimal for 51 percent

pysics
a school bus takes 0.530 h to reach the school from your house. if the average velocity of the bus is 19.0 km/h to the east, what is the displacement?

physical science
8.92

algebra
(-1, 2) (7, 6) (-3, 2) (5, 5)

algebra
Select the ordered pair from the choices below that is a solution to the following system of equations: 4y = 2x + 10 8x - 3y = -14

Trigonometry
I am trying to help my child out with a problem but yeah I am finding it veyr hard. Gabe is spending two weeks on an archaeological dig. He finds a fragment of a circular plate that his leader thinks may be valuable. The arc length of the fragment is about 1/6 the circumferenc...

Finance
A CBS bond with a par value of $1,000, an interest rate of 7.625 percent, and a maturity of 10 years The bond is selling for $986. The required rates of return is 6 percent for the bond.

PHYSICS!
A 0.15 kg ball of dough is thrown straight up into the air with an initial velocity of 13 m/s. (a) Find the momentum of the of dough at its maximum height. kg·m/s upward (b) Find the momentum of the ball of dough halfway to its maximum height on the way up. kg·m/...

physics
A 1.88-m long rope has a mass of 0.139 kg. The tension is 55.4 N. An oscillator at one end sends a harmonic wave with an amplitude of 1.09 cm down the rope. The other end of the rope is terminated so all of the energy of the wave is absorbed and none is reflected. What is the ...

math
for two consecutive numbers, the sum of the smaller number plus twice the lage number is 38. what are the numbers?

statistics
MacDonald’s executives want to experiment with redesigning its restaurants so that the customers form one line leading to four registers, rather than four lines leading to four separate registers. They redesign 30 randomly selected restaurants with the single line. In add...

Chem
A 2.00L flask is filled with propane gas(C3H8)at 1.00atm and 15C. What is the mass of propane in the flask?

MATH
Which division sentence will give an answer that is not in equal groups? a.) 26/4 b.) 35/7 c.) 42/6 d.) 45/5

language
what sentence could you use please in an appaositive sentence

MATH
Coin box Question: Assume that there are 25 pennies, 10 nickels, 10 dimes, and 5 quarters in a box. after shuffeling the box, you pick a coin at random and note down its face value. let x represent the face value of the coin in cents. then construct the probability distributio...

Statistics
Coin box Question: Assume that there are 25 pennies, 10 nickels, 10 dimes, and 5 quarters in a box. after shuffeling the box, you pick a coin at random and note down its face value. let x represent the face value of the coin in cents. then construct the probability distributio...

Stat
Coin box Question: Assume that there are 25 pennies, 10 nickels, 10 dimes, and 5 quarters in a box. after shuffeling the box, you pick a coin at random and note down its face value. let x represent the face value of the coin in cents. then construct the probability distributio...

physics
The distance from an observer on the plain to the top of a nearby mountain is 5.3km, and the angle between this line and the horizontal is 8.4 degrees. How tall is the mountain?

Algebra
You're right, it is 2x^2.

Algebra
69: 16x^2+8x-3. I inserted this into the quadratic formula and got -8+/- the square root of (8^2-4(16)(-3)/(2 times 16). This reduced to -8+/- the square root of (64+120)/32, which further reduced to -8+/-the square root of 184/32. I reduced the top part to -8 +/- the square r...

math
identifying domain and range

Physics
A fire helicopter carries a 679 kg bucket of water at the end of a 15.2 m long cable. Flying back from a fire at a constant speed of 42.5 m/s, the cable makes an angle of 49.0o with respect to the vertical. Determine the force of air resistance on the bucket.

Physics
Your groceries are in a bag with paper handles. The handles will tear off if a force greater than 50.8 N is applied to them. What is the greatest mass of groceries that can be lifted safely with this bag, given that the bag is raised with constant speed.

Chem
You've just prepared a solution by transferring 20.0 g of glucose into a 1.0 - L volumetric flask, and adding water to the mark. Calculate the concentration of the glucose solution in terms of millimoles/Liter, mg/mL, and % (m/v). Ok, I think i'm overwhelmed by the wor...

Chem
You've just prepared a solution by transferring 20.0 g of glucose into a 1.0 - L volumetric flask, and adding water to the mark. Calculate the concentration of the glucose solution in terms of millimoles/Liter, mg/mL, and % (m/v).

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