Help please!
Most popular questions and responses by Help please!
GEOMETRY
The diameter of a circle has endpoints P(β10, β2) and Q(4, 6). a.Find the center of the circle. b.Find the radius. If your answer is not an integer, express it in radical form. c.Write an equation for the circle.
asked on May 30, 2012 
Algebra
Given the function rule f(x)=x^24x+3, what is the output of f(3)? A 24 B 21 C 0*** D 3
asked on May 28, 2015 
Social Studies
1. Why did Henry the Navigator sponsor voyages of exploration? A. To establish colonies in the Americas B. To find better trade routes to Asia C. To search for gold and other riches D. To engage in the triangular trade Please help me I have no idea!
asked on March 23, 2018 
Math
Hi! My math teacher hasn't responded to me so I need help! The question is asking me to find lateral area of a pyramid, but I don't know the formula to do so.
asked on March 21, 2019 
PreAlgrebra
3. 2x^2+6x7x+83x^2+1 A. 2x^2+x+9 B. 2x^2x9 C. x^2x+9 D. x^2+9 4. What are the coefficents in the polynomial 4x^2+3x3 A. 4,3,3 B. 4,3 C. 4,3,3 D. 4,3 6. (7x^2x2)(6x^3+3) A. 6x^3+7x^2x5 B. 6x^3+7x^2x+1 C. x^3x5 D. x^2x+1 7. Suppose
asked on May 24, 2016 
Math
A highspeed train makes a 360 mile nonstop run between two major cities in 712 hours. The train travels 80 mph in the country, but safety regulations require that it travel only 20 mph when passing through smaller, intermediate cities. How many hours are
asked on December 7, 2015 
Social Studies
How did the fall of communism most impact people in Eastern Europe economically? A. Privatization has allowed them to become entrepreneurs. B. Greater freedoms have enabled collective farming. C. Democratic elections have ensured more representative
asked on May 3, 2018 
Math!!!
Suppose Y is a continuous variable whose density gives the following probabilities: Pr{ Y < 3 } = 0.05 Pr{ 3 < Y < 1 } = 0.15 Pr{ 1 < Y < 0 } = 0.3 Pr{ 0 < Y < 1 } = 0.3 Pr{ 1 < Y < 3 } = 0.15 Pr{ Y > 3 } = 0.05 Compute Pr{ Y > 0 } = ???? Thank you!
asked on January 6, 2016 
Social Studies
which historical event was the most important in forming the character of modern Germany? A: industrial revolution B: protestant reformation C: WW2 D: enlightenment
asked on April 18, 2018 
Algebra
Since opening night, attendance at Play A has increased steadily, while attendance at Play B first rose and then fell. Equations modeling the daily attendance y at each play are shown below, where x is the number of days since opening night. On what day(s)
asked on June 1, 2018 
Math
After a boulder is pushed down a hill, its speed s(t) at time t is given by the formula s(t)=v+at, where v is the initial velocity and a is the acceleration. If s(2)=16 and s(5)=25, find the initial velocity and acceleration.(round to the nearest tenth)
asked on December 7, 2015 
Math
A bag contains 6 red marbles, 3 white marbles, and 7 blue marbles. You pick a marble without looking. Find the probability of drawing a white marble. A. 3/7 B. 7/16 C. 3/16 D. 13/16 Please help please and thank you
asked on June 9, 2017 
Physics
A dragster's top acceleration is 60m/s^2. If it accelerates for 3 seconds from the starting line, how fast will it be going?
asked on March 24, 2015 
Modern World Studies
Hi! I just needed someone to check my answer on this question before I turned it in. Although they are considered an important part of Native American culture, there were no ____ in the Americas before Spanish explorers arrived. A: tomatoes (I pick this)
asked on February 15, 2018 
Math
With the current, a person can canoe 24 miles in 4 hours. Against the same current, the same person can canoe 18 miles in 6 hours. Find the personβs average rate in still water and the average rate of the current.
asked on December 7, 2015 
Math
A woman rows a boat 1.75 miles upstream against a constant current in 35 minutes. She then rows the same distance downstream (with the same current) in 15 minutes. What is the rate of the current?
asked on December 11, 2015 
Algebra
Which of the following methods can be used to construct a pattern of 10 numbers for which it would be mathematically impossible to predict the 11th term? (more then one answer.) A.Make a pattern, starting with 3, where each number is the next digit of pi
asked on April 4, 2013 
chemistry
A 31.5 ml aliquot of H2SO4 of an unknown concentration was titration with 0.0134 M NaOH. write the balanced chemical reaction with the correct states of matter.
asked on April 23, 2010 
Math
British sterling silver is a coppersilver alloy that is 7.5% copper by weight. How many grams of pure copper and how many grams of British sterling silver should be used to prepare 200 grams of a coppersilver alloy that is 10% copper by weight? (round to
asked on December 7, 2015 
Math
What is the difference between the height of the tallest man at 92.95" and the mean height of men at 69.6" and a stanard deviation of 2.8? How many standard deviations is that? Convert tallest man to a z score Does tall mans height meet the criterion of
asked on January 23, 2011 
Chemistry
In a redox reaction, explain why the oxidizing agent undergoes reduction?
asked on April 28, 2019 
statistics
What is the difference between the height of the tallest man at 92.95" and the mean height of me at 69.6" and a stanard deviation of 2.8? How many standard deviations is that? Convert tallest man to a z score Does tall mans height meet the criterion of
asked on January 23, 2011 
chemestry
a coin is composed of gold and silver. the 5.00g coin is dissolved in nitric acid and the solution treated with NaCl to precipitate out 2.35g of AgCl. Gold chlorides do not precipitate under the same conditions. What is the composition of silver (by mass)
asked on September 29, 2011 
Stats
Among 15,378 Delta airline passengers randomly selected, 3 were bumped from a flight against there wishes (based on data from the us dept of transportation) find the probability that a random selected passenger is involuntarily bumped. Is such bumping
asked on February 1, 2011 
physics
A loudspeaker diaphragm is vibrating in simple harmonic motion with a frequency of 430 Hz and a maximum displacement of 0.90 mm. what is the max speed? what is the max acceleration?
asked on January 22, 2011 
chemistry
Sulfuric acid reacts with hydrogen iodide to produce sulfur dioxide, iodine and water. a) write total ionic equation b)write net ionic equation
asked on April 23, 2010 
math
Two trains leave a station at 11:00am. One train travels north at a rate of 75 mph and another travels east at a rate of 60 mph. Assuming the trains do not stop, about how many minutes will it take for the trains to be 250 miles apart?
asked on December 10, 2015 
College Chemistry
The molar heat of reaction, H rxn, for the reaction of Ca(s) + 2H+(aq) Ca2+(aq) + H2(g) is 544.789 kJ/mol and Hrxn, for the reaction of CaO(s) + 2H+(aq) Ca2+(aq) + H2O(l) is 192.42 kJ/mol, the heat of formation of water is 286 kJ/mol, The H ffor CaO(s)
asked on February 18, 2011 
Math
The length of a rectangular pool is to be four times its width, and a sidewalk 6 feet wide will surround the pool. If a total area of 1440 ππ‘ 2 has been set aside for construction, what are the dimensions of the pool?
asked on December 10, 2015 
Math
A short airplane trip between two cities took 30 minutes when traveling with the wind. The return trip took 45 minutes when traveling against the wind. If the speed of the plane with no wind is 320 mph, find the speed of the wind and the distance between
asked on December 7, 2015 
Physics Help Please
A solenoid 20 cm long is constructed from 500 loops of wire and carries a current of 5 A as seen the diagram below. A tiny hole is drilled through the diameter of the solenoid in such a way that the current through the solenoid is not disrupted. If an
asked on April 1, 2015 
Algebra
The simple formula for the nth term of an arithmetic sequence is an = 4n + 16. What is the explicit formula corresponding to the simple formula?
asked on April 4, 2013 
tats
No(Did not lie) Yes(lied) positive test result 15(false positive) 42(true positive) negative test result 32(true negative) 9 (false negative) Refer to table and assume that one of the 98 test subjects is randomly selected. Find the probability of selecting
asked on February 6, 2011 
CALCULUS 2
Consider the solid S described below. A right circular cone with height 7h and base radius 2r Find the volume V of this solid
asked on February 17, 2010 
IPC
Dont understand ipc at all... As more resistors are added to a series circuit, the current ____ Increases Stays the same Decreases
asked on May 11, 2011 
World History
what are the most important events that happened in the genocide in rwanda?
asked on October 29, 2007 
Math
The base of a triangle is three inches more than its height. If each is increased by 3 inches the area of the triangle (1/2 bh) is 14 square inches. Find the original base (π) and the original height (β) in inches. (Lesson 15)
asked on December 11, 2015 
Math
Temperature readings on the Fahrenheit and Celsius scales are related by the formula πΆ = 5 9 (πΉ β 32). Determine when the temperature reading on the Celsius scale is twice the temperature reading on the Fahrenheit scale.
asked on December 10, 2015 
Statistics
A clinical trial tests a method designed to increase the probability of conceiving a girl. In the study, 449 babies were born, and 250 of them were girls. Use the sample data with .01 significance level to test the claim that with this method, the
asked on November 26, 2013 
CALCULUS 2
Consider the solid obtained by rotating the region bounded by the given curves about the line x = 1. y = x, y = 0, x = 4, x = 6 Find the volume V of this solid
asked on February 17, 2010 
Social Studdies
How did magnetic compasses effect life in Europe?
asked on March 23, 2018 
Physics
A Green light wave is traveling a rate of 3*10^8 m/s and a wavelength of 561 m. How fast would a red wave with a wavelength of 447m travel?
asked on March 20, 2014 
chemestry
the mass of CuSCN precipitate is 1.379g, what is the mass of copper in the precipitate?
asked on September 29, 2011 
stats
group rh+ 39 35 8 4 rh 6 5 2 1 People with blood type AB and rh+ are considered to be universal recipients. If three of the 100 subjects are selected find the probability they are all universal recipients.
asked on February 6, 2011 
Math
The base of a triangle is three inches more than its height. If each is increased by 3 inches the area of the triangle (1/2 bh) is 14 square inches. Find the original base (π) and the original height (β) in inches. (Lesson 15)
asked on December 15, 2015 
Math
A pharmacist is to prepare 30 milliliters of a solution with a drug concentration of 2 mg/mL. To do so, he will mix a solution with a drug concentration of 7 mg/mL with grapeflavored syrup. If π₯ represents the number of milliliters of grapeflavored
asked on December 15, 2015 
Math
You have 8 liters of a 60% alcohol solution. How many liters of water should be added to make a 35% alcohol solution?.
asked on December 11, 2015 
Biology
What would happen if you ran the same sample of DNA as your first experiment but used different primers?
asked on October 28, 2013 
physics
A yoyo has a rotational inertia of 810 gΒ·cm2 and a mass of 95 g. Its axle radius is 2.6 mm and its string is 100 cm long. The yoyo is thrown so that its its initial speed down the string is 1.0 m/s. (a) How long does the yoyo take to reach the end of
asked on January 23, 2011 
math please help!
miguel line sup 5 cups of pop (labelled Cup 1, 2, 3, 4, 5 on a table. sandra then tastes each cup and records "D" if she thinks its diet pop or "R" if she thinks its regular pop. a. how many different ways can the Ds and Rs be recorded if sandra guesses
asked on January 18, 2011 
FIN
Brady Corporation is a leader in identification, safety, and material solutions. In 1998, the firm was hit hard by faltering foreign markets, so it embarked upon an aggressive campaign to redesign its cost structure. The firm believes this will help it to
asked on August 7, 2007 
Math
What percent of 25 is 10? 10 = p β’ 25; 40% 10 = p β’ 25; 250% 25 = p β’ 10; 40% 25 = p β’ 10; 250% Is it A or C? Help please! Thanks!!
asked on December 7, 2017 
Math
solve the exponential function for x using base 5 logarithms. 5^x+4=125^13x
asked on December 13, 2015 
Math
solve the exponential function for x by using common logarithms. 5^x=50^x+1
asked on December 11, 2015 
Math
Find all values of π, so that the solutions of the following equation are real numbers 2x2 β 4π₯ + π = 0
asked on December 11, 2015 
Differentials (calc)
Solve the Poisson equation β^2u = sin(Οx) for 0 β€ x β€ 1and 0 β€ y β€ 1 with boundary conditions u(x, 0) = x for 0 β€ x β€ 1/2, u(x, 0) = 1 β x for 1/2 β€ x β€ 1 and 0 everywhere else. Hint: break this up as into two different PDEs.
asked on December 7, 2015 
Math
For a particular quadratic function f(x)=ax^2+bx+c, f(β3)=β13 and f(2)=7. If a=β3, find b and c.
asked on December 7, 2015 
physics
State the surface powers required to produce the following lenses with +6.25D front curves. a. 0.50 DS b. +0.50 DS c. +1.75 DS Is a 6.75DS?....
asked on October 23, 2012

Math
I can't find a website that works though, everything is so confusing!
posted on March 21, 2019 
Social Studies
yes, you are correct I do ask strangers for help when I have trouble with my questions AFTER reading my entire lesson. It just happens that you are one of those people. I have been thinking about how are one of the first people to answer anyone's
posted on May 3, 2018 
Social Studies
you are no help
posted on May 3, 2018 
Social Studies
I think its D
posted on May 3, 2018 
Polynomials
I think it is either A or B
posted on May 25, 2016 
PreAlgrebra
I think that 3 is B... 4 I think is B... 6 is maybe A... 7 I think is B... 15 is maybe C... 18 is possibly C... 19 is maybe B... 20 is I think C... and 21 is possibly A? Any way.. I don't think that these are correct...
posted on May 25, 2016 
PreAlgrebra
Help! Please!
posted on May 25, 2016 
PreAlgrebra
So... Can anyone help me with these problems?
posted on May 24, 2016 
PreAlgrebra
ok but I know how to do some of them but these are giving me a hard time.
posted on May 24, 2016 
PreAlgrebra
ok I guess but I really do need help with these! I truly do not wan to fail math!
posted on May 24, 2016 
PreAlgrebra
I could try but I am not good at these...
posted on May 24, 2016 
Math!!!
That's equal to zero :) :) :) For this question I got .45 and it was automatically marked as wrong so I was frustrated! Thank you!
posted on January 6, 2016 
Math
Thank you
posted on December 7, 2015 
4th grade math
1.50(253)  78(253) It should be $182.16
posted on March 24, 2015 
IPC
its an online coarse.. thanks.
posted on May 12, 2011 
Chemistry
how would you find total number of moles?
posted on April 17, 2011 
CALCULUS 2
It's calculus and it's in my homework.
posted on February 17, 2010 
World History
Probably the beggining and why it started
posted on October 29, 2007