Jen

Questions and answers by visitors named Jen

Questions (1,135)

1. Which is the best example of how Reagan dealt with the Soviet Union from a position of strength?A. development of the
1. 17 answers
2. 5,323 views
A horizontal pipe has a cross sectional area of 40.0 cm^2 at the wider portions and 10.0 cm^2 at the constriction. Water is
1. 7 answers
2. asked by Jen
3. 2,566 views
A culture starts at 8600 bacteria. After one hour the count is 10,000.Find a function that models the number of bacteria n(t)
1. 4 answers
2. 11,229 views
A particle moves along the x axis so that its position at any time t>= 0 is given by x = arctan tWhat is the limiting position
1. 3 answers
2. 2,895 views
Tarzan spies a 35kg chimpanzee in severe danger, so he swings to the rescue. He adjusts his strong, but very light, vine so that
1. 3 answers
2. 2,408 views
Find normals to the curve xy+2x-y=0 that are parallel to the line 2x+y=0I have the answer: at(-1,-1), y=-2x-3, and at (3,-3),
1. 4 answers
2. 4,648 views
f(x) = sqrt(x^2 + 0.0001)At x = 0, which of the statements is true. a)f is increasing b)f is discontinuous c)f has a horizontal
1. 3 answers
2. 994 views
A missile rises vertically from a point on the ground 75,000 feet from a radar station. If the missile is rising at the rate of
1. 4 answers
2. 2,453 views
Question 1.A Compound Containing 3 Atoms Of Carbon & 8 Atoms Of Hydrogen Is Combined In A Reaction With Oxygen Molecules. The 2
1. 5 answers
2. 4,697 views
Calculate the Volume in Cubic Feet of a section of drainage pipe that measures 8 feet in length and 24 inches in diameter. I
1. 4 answers
2. 771 views
A 15.0 kg box is released on a 32 degree incline and accelerates down the incline at 0.30m/s sqaured ? find the friction force
1. 5 answers
2. 8,852 views
A truck with 36-in.-diameter wheels is traveling at 55 mi/h.Find the angular speed of the wheels in rad/min, *hint convert miles
1. 4 answers
2. 4,039 views
3. A force of 36 N gives a mass m1 an acceleration of 4.0 m/s2. The same force gives a mass m2 an acceleration of 12 m/s2. What
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2. 3,595 views
Given that x=log3^5 and y=log3^2, rewrite log3^60 in terms of x and y.
1. 4 answers
2. 4,076 views
Divide. (X^2+6x+9/x-1)/(x^2-9/x^2-2x+1)A. (X+3)(x-1)/(x-3) B. (X-3)(x+1)/(x+3) C. (X+3)(x+1)/(x-3)** D. (X-3)(x-1)/(x+3) Divide.
1. 4 answers
2. 1,285 views
The arch of the bridge below is half an ellipse, a "semi-ellipse". The arch is 148m long and has a height of 48m at the center.
1. 5 answers
2. 4,947 views
2. According to the map, how did people first arrive in North America?(A). They traveled by boat from Africa. (B). They sailed
1. 19 answers
2. 5,473 views
Write in sigma notation 1/3,2/9,-7/27,14/81,-23/243,34/729...
1. 4 answers
2. 1,117 views
Please help me simplify this:y = x/(4-sqrt(16+x)) Rationalize the denominator. Multiply by the conjugate, or (4+sqrt (16+x)) to
1. 1 answer
2. 493 views
I need to find the exact solution to:2sin2x = sqrt(x)on the interval (0,pi) This is how I started it, but I don't think it's
1. 1 answer
2. 633 views
I need to find the exact solutions on the interval [0,2pi) for:2sin^2(x/2) - 3sin(x/2) + 1 = 0 I would start:
1. 1 answer
2. 824 views
a) Identify two express powers of the presidentb) what are the express powers of the Vice Presiden? c)Identify two express
1. 1 answer
2. 658 views
a) Identify two express powers of the presidentb) what are the express powers of the Vice Presiden? c)Identify two express
1. 1 answer
2. 1,238 views
a)What body has the power to accept or reject a president's nominations to the Supreme Court?b)What margins is required to
1. 6 answers
2. 1,373 views
the mid-point of the line FG is (6,10). if the coordinates of G is (8,14) find the coordinates of F.There are a number of ways
1. 2 answers
2. 593 views
An elevator cab in NY Marriott has a total run of 190 m . IT's max speed is 305m/min Its acceleration and deceleration both have
1. 2 answers
2. 1,793 views
A ball is throen vertically downward from the rop of a 36.6 m tall building . The ball passes the top of a window that is 12.2 m
1. 1 answer
2. 741 views
Two diamonds begin a free fall from rest from the same height, 1 s apart. How long after the first diamond begins to fall will
1. 1 answer
2. 779 views
The line that is normal to the curve x^2=2xy-3y^2=0 at(1,1) intersects the curve at what other point?Please help. Thanks in
1. 5 answers
2. 10,864 views
how to find derivative of y:y = sin inverse(square root of 2t) I got this. Please ignore.
1. 1 answer
2. 1,067 views
What is the mole fraction of CO2 if one liter of a mixture contains 2.50mol O2,5.00 mol N2, and 1.50 mol CO2?A).214 B).167
1. 1 answer
2. 376 views
y = s*square root of(1-s^2) + cos inverse(s)Just give me some hints and I will do it. Thanks. You have y = s*square root
1. 1 answer
2. 462 views
If f(x)=cosx + 3how do I find f inverse(1)? Thanks y = cos(x) + 3 the inverse of this is x = cos(y) + 3 solve for y and you have
1. 2 answers
2. 2,525 views
Thanks for the help with my previous problems Roger & Leo. It was really helpful.Now I want to know how to find the right and
1. 5 answers
2. 713 views
Using logarithmic differentiate technique, find dy/dxy = [(x-3)³(x²+1) / (2x+5)³] raised to the power of 1/5 I don't know how
1. 1 answer
2. 486 views
The amount A(gms) of radioactive plutonium remaining in a 20gm sample after t days is given by: A = 20 * (1/2)^t/140At what rate
1. 1 answer
2. 1,234 views
Using property of logarithms, how do I prove derivative of ln(kx) is 1/xFirst observe that ln(kx) = ln(k) + ln(x) then take
1. 1 answer
2. 546 views
How to find the exact value oflim (2^h - 1)/ h h->0 Thanks in advance. If you use lim dx->0 of [f(a + dx) - f(a)]/dx = f'(a) and
1. 1 answer
2. 417 views
At what point of the graph of x^2 / 2 is the tangent line parallel to the line 2x-4y = 3TIA
1. 1 answer
2. 584 views
Evaluate1. sin(tan inverse sqrt(x^2-2x)) 2. tan (sec inverse 3y)
1. 1 answer
2. 467 views
Reposting because it has gone down to the second page!Evaluate 1. sin(tan inverse sqrt(x^2-2x)) 2. tan (sec inverse 3y) For 1.
1. 1 answer
2. 520 views
f(x) = x^3 - 2x, x<=2x + 2, x>2 Why do they say f'(2) is undefined? TIA I a f' = 3x^2-2 x<=2 and f'(2)=10 f' = 1 x>2 f'(2+)= 1
1. 1 answer
2. 352 views
Using analytical method, find the extreme values of the functions on the interval and where they occur.1. f(x) = ln(x+1),
1. 2 answers
2. 564 views
find the extreme values of the function on the interval and where they occur.f(x) = |x-1|-|x-5|, -2<=x<=7
1. 1 answer
2. 446 views
f(x) = 1/x + ln(x), 0.5<=x<=4The local maximum of this function is given by (1/2, 2-ln(2)) How do we get this answer? It is
1. 1 answer
2. 367 views
find the extreme values of the function on the interval and where they occur.f(x) = |x-1|-|x-5|, -2<=x<=7 How do I do this?
1. 1 answer
2. 786 views
Graph of f(x) = -2x + C passes through (-2,7)How do I find C. TIA Since f(x) = 7 when x is -2, 7 = -2(-2) + C = 4 + C C = 3
1. 1 answer
2. 322 views
f(x) = sqrt(x-1), 1<=x<=3Let A = (a,f(a)), and B = (b,f(b)). Write an equation for 1. the secant line AB 2. a tangent line to f
1. 1 answer
2. 1,034 views
How to find all possible functions of f with a given derivative.1. f'(x) = 2 2. f'(x) = sinx Integrate each function. Remember
1. 1 answer
2. 809 views
Show that the function f(x)=1-|x|, [-1,1] does not satisfy the hypotheses of the mean value theorem on the given interval.Also
1. 1 answer
2. 645 views
a differentiable function y =f(x) that has the given properties.1. local minimum at (1,1), and local maximum at (3,3) 2. local
1. 1 answer
2. 666 views
How do I make a graph off'(-1) = f'(1) = 0, f'(x) > 0 on (-1,1), f'(x) < 0 for x < -1, f'(x) > 0 for x >1 Thanks. if the
1. 1 answer
2. 574 views
How do I explain this problem?A trucker handed in a ticket at a toll booth showing that in 2 h he had covered 159 mi on a toll
1. 1 answer
2. 551 views
Thanks for the help with my previous problems.The acceleration to gravity on the moon is 1.6m/sec^2. If a rock is dropped into a
1. 3 answers
2. 678 views
What is the difference between the statementssegmentAB is congruent to segmentCD & AB is congruent to CD Thanks No difference.
1. 1 answer
2. 419 views
Three segments are given.I need to draw one segment with the same length as any one of the given segments. Then take the measure
1. 1 answer
2. 651 views
When I solve the inquality 2x^2 - 6 < 0,I get x < + or - sqrt(3) So how do I write the solution? Is it (+sqrt(3),-sqrt(3)) or
1. 1 answer
2. 1,161 views
How do I show that the equationx^4 + 3x + 1 = 0, -2 <= x <= -1 has exactly one solution in the interval. Thanks. One way to do
1. 1 answer
2. 730 views
The geometric mean of two postitive numbers a and b is sqrt(ab).Show that for f(x) = 1/x on any interval [a,b] of positive
1. 4 answers
2. 960 views
Have to find the intervals on whichf(x) = 4 - sqrt(x+2) is increasing. Also the intervals on which the function is decreasing.
1. 1 answer
2. 684 views
Sketch the graph of a differentiable function y = f(x) with the following properties.f(2) = 3, f'(2) = 0, and (a) f'(x) > 0 for
1. 1 answer
2. 1,030 views
Hopefull the last one. :)Sketch the graph of a differentiable function y = f(x) with this property: A local minimum value that
1. 1 answer
2. 436 views
3x^2 - 2 + 2 sin(x) = 0Thanks. The easy way is to graph it, and look for the zeroes in the graph. My guess is there is one
1. 1 answer
2. 380 views
Find the domains of f and f'1, f(x) = xe^x 2. f(x) = x^(3/5) 3. f(x) = x/(x-2) TIA 1) R 2) It's the interfal from zero to
1. 1 answer
2. 675 views
Find the horizontal asymptotes of the function's graphy = 200 / (1+10e^(0.5x)) If you let x --> minus infinty the exponential
1. 1 answer
2. 695 views
If one angle and two sides of a triangle are given, how to find the third side?This is for solving a 9th grade geometry problem
1. 1 answer
2. 954 views
I have already asked this in another thread. Here is more explanation:The radius of earth's orbit is 1.5 * 10^8km & the radius
1. 1 answer
2. 548 views
How to find the intervals on which the following function is a)increasing b)decreasing c)concave up d)concave down.y = 2x, x < 1
1. 1 answer
2. 941 views
How to analytically find the intervals on which the function y = 2x^4 - 4x^2 + 1 is1)increasing 2)decreasing 3)concave up
1. 1 answer
2. 749 views
how to prove1)the measure of each angle of an equilateral triangle is 60. 2)the bisector of the vertex angle of an isosceles
1. 2 answers
2. 977 views
Applications of derivativesA rectangle has its base on the x axis and its upper two vertices on the parabola y=12 - x^2. What is
1. 1 answer
2. 555 views
The sum of two positive numbers is 20. Find the numbers if the sum of their squares is as large as possible; as small as
1. 2 answers
2. 1,630 views
Again from applications of derivatives..what is the largest possible area for a right triangle whose hypotneus is 5cm long, and
1. 3 answers
2. 777 views
Applications of derivativesYou are planning to make an open rectangular box from an 8 by 15 inch piece of cardboard by cutting
1. 1 answer
2. 880 views
You are planning to close off the corner of the first quadrant with a line segment 20 units long running from (a,0) to (0,b).
1. 3 answers
2. 2,044 views
this is my last question from applications of derivatives!A 216m^2 rectangular pea patch is to be enclosed by a fence and
1. 3 answers
2. 1,851 views
How to find a point on the line? x cordinate is given as x.The diagram is like a rectangle is inscribed in an isosceles right
1. 2 answers
2. 514 views
The function is given asy = 7x^3 - 8x^2 -16x +15 The max is at x = -4/7 & min is at x = 4/3 How do I know that it is local
1. 1 answer
2. 529 views
f(x) = x^4 + ax^2What is a if f(x) has a local minimum at x=5. How do I justify the answer. The first derivative has to be zero
1. 1 answer
2. 843 views
Demand function P=50-QAverage Cost 5Q + 40 +10/Q Calculate the firm's total cost function Find the marginal cost function and
1. 2 answers
2. 866 views
If y is a differentiable function of x, then the slope of the tangent to the curve xy - 2y + 4y^2 = 6 at the point where y=1 is
1. 5 answers
2. 4,093 views
Suppose lim x->0 {g(x)-g(0)} / x = 1.It follows necesarily that a. g is not defined at x=0 b. the limit of g(x) as x approaches
1. 3 answers
2. 1,624 views
Here is my question:A 200 N sphere 0.20 m\m in radius rolls, without slipping, 6.0 m down a ramp that is inclined 28 degrees
1. 1 answer
2. 586 views
A light plank rests on two scales that read Fg1 = 410 N and Fg2 = 310 N. The scales are separated by a distance of 2.00 m. How
1. 3 answers
2. 1,361 views
limit h->0 [sqrt((4+h)) - 2] / h = ?Thanks multiply numerator and denominator by [sqrt(4+h)+2] numerator becomes h denominator
1. 1 answer
2. 391 views
for a small regional airline, the number of claims for missing luggage averages 70 per week.a. what is the probability that on a
1. 1 answer
2. 459 views
George and phil were playing with their fish tank again. they had a difficult time keeping their fish tank is 100 cm long, 60 cm
1. 1 answer
2. 639 views
How do I know if the limit of a function exists or not from that function's graph. Thanks.It the graph of a function becomes
1. 2 answers
2. 743 views
f(x) = (x^2 - 4)/(x-2) if x not equal to 2f(x) = k if x = 2 for which value of k is f continuous at x = 2 f(x) = x +2 (obtained
1. 1 answer
2. 430 views
An equation of the normal to the graph of f(x) = x / (2x-3) at (1,f(1)) is ........find f' Then, the slope of the normal will be
1. 1 answer
2. 502 views
A = 1/2 ab SinèHow is dA/dt related to da/dt, db/dt and dè/dt dA/dt= 1/2 b SinTheta da/dt + 1/2 a SinTheta db/dt + 1/2 ab
1. 1 answer
2. 539 views
V = IRV is increasing at the rate of 1 volt/sec while I is decreasing at the rate of 1/3 amp/sec. Let t = time in sec What is
1. 4 answers
2. 640 views
A 0.9 kg hollow ball with a radius of 0.12 m, filled with air, is released from rest at the bottom of a 2.0 m deep pool of
1. 1 answer
2. 440 views
A liquid ( = 1.65 g/cm3) flows through two horizontal sections of tubing joined end to end. In the first section the
1. 4 answers
2. 1,357 views
How do I convert 1.65 g/cm3 into kg/m3?1000gm= 1kg 100cm= 1m 1.65g/cm^3 X (1kg/1000g) X (100cm/1m)^3=1650 kg/m^3 Thanks, that
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2. 411 views
t(sec) 1 1.5 2 2.5v(ft/sec) 12.2 1.3 13.4 13.7 velocity of an object moving along a line at various times. How do I estimate the
1. 1 answer
2. 462 views
How do check the graph of a function has an infinite discontinuity at a point or not? (without the help of a graphing
1. 1 answer
2. 617 views
f(x) = x^2g(x) = e^2x h(x) = ln(2x) which function is increasing the fastest when x = 2 How do I do this? TIA I will assume that
1. 1 answer
2. 715 views
Well, bobpursley explained this to me. I didn't understand this well. Since there was an error in the data, I am posting it
1. 1 answer
2. 452 views
d/dx( ln |sin(pi/x)| ) = ?Thanks. If those are absolute value signs, the derivative will not exist when sin (pi/x) = 0, because
1. 3 answers
2. 4,041 views