Let O represent the origin and P be the point (9, -4). Find the positive angle (counterclock wise direction)that the line segment OP makes with the positive x-axis. the answer is 5.86 radians but i keep getting 0.418 radian. please help and show work
January 24, 2010
calculus (related rates)
A particle moves in the plane along the curve y=xln(x). At what rate is the distance from the origin increasing at the moment its x-coordinate is 2 cm and its x-coordinate is increasing at a rate of 17 cm/sec?
October 27, 2009
T^(1/3)=e^(r/10)m^(3/2) If the mass and radius are given as m= 2 mg and r= 5mm, and the rates of change of the temperature and radius are given as 3 deg/sec and 1 mm/sec, what is the rate of change of mass (m)?
October 27, 2009
why can I not use the formula m1v1=m2v2 for the following question: What volume of 1.20 M NaOH will be needed to neutralize 225 mL of 3.0 M sulfuric acid? I get 0.56 L but the answer should be 1.1 L. When am I able to use that formula and when can I not?
October 18, 2009
A rocket is launched straight up with constant acceleration. Four seconds after liftoff, a bolt falls off the side of the rocket. The bolt hits the ground 7.00s later. What is acceleration of rocket. I believe if you use x(final)= x(initial +v(initial)deltaT+ 1/2adeltatsquared...
September 6, 2009
I have to make a graph showing to the tenth of a second showing velocity, displacement, and acceleration for throwing a tennis ball up three times and letting it hit the ground. My times are 2.85 seconds, 2.56 seconds, and 2.60 seconds. Any help would be greatly appreciated.
October 21, 2008
on a certain farm, on average, 64 hens lay 768 eggs in 64 days. also on average, 46 hens on same farm eat 46 kilograms of wheat in 46 days. On this farm, on average, the consumption of how much wheat (in kg) corresponds to 2 dozen eggs?
September 25, 2008
what is the word used for distance traveled per time unit? What is speed in a given direction? And what is the word used for A moving object traveling the same distance in equal units of time?
September 15, 2008
Given a single deck of cards, what is the probability of drawing either a king or a diamond? Hint There are four kings in a deck and 13 diamonds. There are a total of 52 cards in a single deck.
May 10, 2008
For a given nominal interest rate, an unexpectedly low inflation rate ______ the real interest rate. a. increases b. decreases c. has no impact on d. may either increase or decrease e. is subtracted from
March 17, 2008
BrO-3 + 5Br- + 6H+ ---> 3Br2 + 3H2O the value of - delta[BrO3]/delta T= 1.5x10^-2M/s at a particular time what is the value of -delta [Br-]/Delta t at the same instant? 13 M/s 7.5x10^-2 1.5x10^-2 3.0x10^-2 330 M/s
February 25, 2008
in 5 seconds, a car moving in a straight line increases it's speed from 50km/h to 65km/h, while a truck goes from rest to 15km/h in a straight line. which undergoes greater acceleration? what is the acceleration of each vehicle?
October 20, 2007
What are the 4 roles a government takes in regulating market activities and What is a popular measure of the price level Do some research, then take a shot. How does govt regulate markets? 2) CPI
May 14, 2007
I think that the IAT IS accurate. I just think that to many of us are willing to be honest with ourself. Anyway, I need some help finding the other ways of measuring prejudice also. Go U of P
July 20, 2006