Thursday
August 25, 2016

Posts by henry

Total # Posts: 11,947

physics
Fr = (Vs+Vt)/(Vs-Vc)*Fc = (443+14)/(443-75) * 1000 = 457/368 * 1000 = 1242 Hz. = Freq. heard by the receiver(Truck driver).
March 16, 2016

Science: Physics
d = 1000N * 1m/500N = 2 m.
March 15, 2016

Math
12/4 does not = 8/24. 8/4 = 24/12. So, the ans. is B.
March 14, 2016

physics
KE = 0.5M*V^2.
March 13, 2016

physics
V^2 = Vo^2 + 2g*h = 0, h = -Vo^2/2g = -80/-19.6 = 4.08 m. = max. ht. 1. PE = M*g*h/2 = 0.1*9.8*(4.08/2) = 2.0 Joules. 2. PE = 0.1*9.8*4.08 = 4.0 Joules. 3. KE = 0.5M*V^2 = 0.5*0.1*80^2 = 320 Joules.
March 13, 2016

Math
P = 11/12.
March 12, 2016

algebra
Width = W feet. Length = W+8 Ft. Width = W+4. Length = W+3. A1 = A2, (W+8)*W = (W+3)*(W+4), W^2 + 8W = W^2 + 4W + 3W + 12, W = 12 Ft., W+8 = 20 Ft.
March 12, 2016

MATH Help!
C = (2/6)n = (1/3)n.
March 12, 2016

Algebra
(1,1), (1,2) (1,3), (1,4), (1,5), (1,6). So, there 6 possibilities per side. 6poss./side * 6sides = 36 Possibilities.
March 12, 2016

math
Bought X eggs @ 18 Cents each. Cost = 18x. (x-8)eggs * 24Cents/egg = 24x-192 = Sale price. Profit = Sale Price - Cost = (24x-192) - 18x = 288 Cents, 6x = 480, X = 80.
March 12, 2016

maths
x/(x+6), (x+1)/(x+4) = 3/4, 4x+4 = 3x+12, X = 8. 8/(8+6 = 8/14 = 4/7.
March 12, 2016

English
I hear the mournful wail of millions, whose chains, heavy and grievous yesterday, are to-day rendered more intolerable by the jubilant shouts that reach them. Which definition of rendered is most likely suited for this line? Caused to be a certain nature Melted down Repeated ...
March 11, 2016

English
To forget them, to pass lightly over their wrongs, and to chime in with the popular theme, would be treason most scandalous. . . Which word is most similar to how chime in is used here? Agree Create Harmonize Resound I have no idea because chime in- means to interject, so ...
March 11, 2016

math
Multiply Eq1 by 3 and Eq2 by -4 and add: 15x - 12y = -21 -12x + 12y = 84 Sum:3x = 63, X = 21. In Eq1, replace x with 21 and solve for y: 15*21 - 12y =-21, 315 - 12y=-21, -12y = -336, Y = 28.
March 11, 2016

Physics
Vp + 80 = 325km/h[240o] CCW. Vp + 80 = -162.5-281.5i, Vp = -242.5 - 281.5i = 372km/h[49.3o] S. of W.
March 10, 2016

Physics
Let L = 100 uh. Xl = 6.28*526.5*10^3*100*10^-6 = 330.642 Ohms = Xc. C = 1/6.28*F*Xc = 1/6.28*526.5*10^3*330.642 = 0.00091 uF = 910 pF. at 526.5 kHz Xl = 6.28*1606.5^10^3*100*10^-6 = 1,009.4 Ohms = Xc. C = 1/(6.28*1606.5*10^3*100*10^-6) = 9.9*10^-4 uF = 990 pF. C = 910 pF to ...
March 10, 2016

Physics
a. d = 50 + 75 + 100 = b. D = 50i + 75[45o] + 100[300o] = 50i + 53+53i + 50-86.6i = 103 - 33.6i = 108.3m[-18.1o] = 18.1o S. of E.
March 10, 2016

English
I think the answer is, because he is pretty much telling the people reform is needed. AFTER an unequivocal experience of the inefficiency of the subsisting federal government, you are called upon to deliberate on a new Constitution for the United States of America. What does ...
March 10, 2016

science
Correction: 3. Wavelength.
March 9, 2016

science
1. Frequency. 2. Friction. 3. Period. 4. Refraction. 5. Reflection or Echo. 6. 7. Decibel.
March 9, 2016

business math
P = Po + Po*r*t = 10,500 + 10,500*(0.12/360)*90 = 10,815 Pesos.
March 9, 2016

math
X Qtrs., 2x Dimes, 2x+4 Nickels, 2(2x+4) Pennies. 25x + 10*2x + 5(2x+4) + 2(2x+4) = 913 Cents, 25x + 20x + 10x+20 + 4x+8 = 913, 59x = 913-28 = 885, X = 15 Qtrs., 30 Dimes, 34 Nickels, 68 Pennies.
March 9, 2016

Math HELP!
Vertical angles.
March 9, 2016

maths
t = 50/60 * 24min. = 20 Min.
March 9, 2016

algebra
Ac + Ar = Ay, pi*r^2 + Ar = 6x*7x, 3.14*(2x)^2 + Ar = 42x^2, 12.57x^2 + Ar = 42x^2, Ar = 29.4x^2 = Area remaining.
March 9, 2016

Math - Help!
Vertical angles.
March 9, 2016

Math
3cakes/4people = 3/4 cake each.
March 8, 2016

Math
5/6 = 105/126, 5/7 = 90/126, 8/9 = 112/126.
March 8, 2016

algebra
1. Yes, Y = 3.5x. 2. No. 4. a^2 + b^2 = c^2. b = 5, c = 15, a = ?. 5. 51 * T = 204. 8. (-5,2), (3,7). L^2 = (3+5)^2 + (7-2)^2 = 89, L = 9.4. 9. (3,-1), (5,-8). m = (-8+1)/(5-3) = 11. (5,2), (x,y), m = 3. m = (y-2)/(x-5) = 3, y-2 = 3(x-5). 12. (-8,2), (x,y), (4,-2). x+8 = 1/2(4...
March 8, 2016

Physics
D = 3 + 4i = 5km[53.1o]. N. of E.
March 8, 2016

Physics
Do you mean 20o N. of E. or N. of w. or what do you mean?
March 8, 2016

Physics
Not Correct: A, C, D.
March 8, 2016

Math
James: X years old, Phil: 2x " " Peter: (2x-3), x + 2x + (2x-3) = 32 X =?
March 7, 2016

electrical technology
10 s. = 10,000 mS. x = t/RC, Vr = 9/e^x = 9-8 = 1, e^x = 9, X = 2.197 = 10,000/(R*47), 2.197 =213/R, 2.197R = 213, R = 96.8Kohms. r
March 7, 2016

English
Sorry I didnt seperate them well . . .the theory which he attempts to demonstrate and the wonderful facts which he relates soon changed this feeling into enthusiasm. My father looked carelessly at the title page of my book and said, "Ah! Cornelius Agrippa! My dear Victor...
March 6, 2016

English
I thought it was C for this Victor Frankenstein recounts the influences that lead to his great experiment: I feel exquisite pleasure in dwelling on the recollections of childhood, before misfortune had tainted my mind and changed its bright visions of extensive usefulness ...
March 6, 2016

English
Could I get some check on my answers? Read these lines from Macbeth: The west yet glimmers with some streaks of day: Now spurs the lated traveller apace, To gain the timely inn; and near approaches The subject of our watch. Which of the following correctly describes how the ...
March 6, 2016

Math
Multiply Eq1 by 3 and Eq2 by 2: 9x - 6y = 15. 10x + 6y = 42. Solve by addition.
March 6, 2016

Electronics
Even if an amplifier circuit does not have band-pass filters, there is a limit on the band of frequencies that it can pass. The lowest frequency is determined by the value of the coupling capacitors. The highest frequency is limited by any capacitance in parallel with the ...
March 5, 2016

maths
VAT = 0.05*(52,500+84,000+262,000+672,000+157,000) =
March 5, 2016

science
L = V/F = 3*10^5/40*10^6 = 0.0075 m.
March 5, 2016

algebra or algebra1
(20)(x^3y^4)^3 = (20)(x^9y^12) = 20x^9y^12.
March 5, 2016

algebra or algebra1
F(a) = 2a + 9 = 7, 2a = -2, a = -1.
March 5, 2016

algebra or algebra1
L = Sqrt(21^2+16^2)
March 5, 2016

physics
C = pi*D = 3.14 * 67 = 211 cm. = 2.11 m. Speed = 11.2rev/s * 2.11 m/rev = 23.6 m/s.
March 4, 2016

Calculus
Show that f(x) = 2000x^4 and g(x) = 200x^4 grow at the same rate I know that they grow at the same rate because they are both raised to the same power, but i don't know how to show it.
March 4, 2016

Math
(5,6), (8,9). m = (9-6)/(8-5) = 1, Y = mx + b = 6, 1*5 + b = 6, b = 1, Y = x + 1. (0,5), (6,3). m = (3-5)/(6-0) = -1/3, Y = mx + b = 5, (-1/3)0 + b = 5, b = 5, Y = (-1/3)x + 5. x + 1 = (-1/3)x + 5, x+1 = -x/3 + 5, x + x/3 = 4, Multiply both sides by 3: 3x + x = 12, X = 3 Min.
March 4, 2016

Math
1. 1cents = 2^0 = 2^(d-1). 2. 2cents = 2^1 = 2^(d-1) 3. 4cents = 2^2 = 2^(d-1). 15. 2^(d-1) = 2^(15-1) = 2^14 = 16,384 Cents(pennies) = $163.84.
March 4, 2016

math
1. Take the chicken across. 2. Take the fox across and bring the chicken back. 3. Take the corn across. 4. Take the chicken across.
March 4, 2016

Calculus
Find the range of the function ∫sqrt(4-t^2) dt where a=0 =x [0, 4π] [0, 2π] [-4, 0] [0, 4]
March 4, 2016

physics
a. Impulse = 0.224 * 22 = b. V = Vo + a*t = -22, 18 + a*0.06 = -22, 0.06a = -40, a = 667 m/s^2. F = M*a = 0.224* (-667) =
March 3, 2016

Physics
h = Vo*t + 0.5g*t^2
March 3, 2016

Physics
Y = 5.07*sin60.2 = 4.40 m/s. d = V*T = 24.7, 4.4*T = 24.7, T = 5.61 s.
March 3, 2016

physics
a. V^2 = Vo^2 + 2g*h, Vo = 0, g = 9.8 m/s^2, h = 0.54 m., V = ?. b. k = Mg/d = (1.7*9.8)/0.088m =
March 3, 2016

Algebra
See previous post.
March 2, 2016

Algebra
See previous post.
March 2, 2016

Algebra
See previous post: Wed, 3-2-16, 10:20 PM.
March 2, 2016

Algebra
(-5,3), (4,-5). Y = mx + b, m = (-5-3)/(4-(-5)) = -8/9, Y = (-8/9)(-5) + b = 3, b = 3 - 40/9 = 27/9-40/9 = -13/9. Eq: Y = (-8/9)x - 13/9.
March 2, 2016

Alegbra
Incomplete.
March 2, 2016

Algebra
a. Y = a(x-h)^2 + k. h = -b/2a = -18/-6 = 3, k = -3*3^2 +18*3 + 53 = 80, Y = -3(x-3)^2 + 80. b. T max = k = 80o F.
March 2, 2016

Algebra
a. h(t) = 0.5g*t^2. b. h(1) = 16*1^2 = 16 Ft. c. h = 0.5g*t^2. h = 35 Ft., g = 32 Ft/s^2, t = ?.
March 2, 2016

math
son's age : (x+5) in 5 years. Parent's age: 2(x+5) in 5 years. 50 < ((x+5) + 2(x+5))< 100, 50 < (x+5 + 2x+10) < 100, 50 < 3x+15 < 100, 50-15 < 3x < 100-15, 35 < 3x < 85, 35/3 < x < 85/3. 11 2/3 < X < 28 1/3, 16 2/3 < x+5 <...
March 2, 2016

Calculus
Determine if the Mean Value Theorem for Integrals applies to the function f(x) = 5 - x^2 on the interval 0 to sqrt 5 . If so, find the x-coordinates of the point(s) guaranteed by the theorem.
March 2, 2016

math 5th grade
5.29 + (2/3)*3.59 + (4/3)*4.79 = $14.07, Yes. 28.50-(2*3.59)-1.34 = 19.98 = Cost of 4 pks. of glass beads. 19.98/4 = $5.00 = Cost of 1 pk. of glass beads.
March 1, 2016

Maths
1. W/100 = 8/5, 5W = 800, W = 160g of wheat. 160 + 100 = 260 Grams of muesli. 2. 84/R = 7/3, 7R = 252, R = 36g of raisins. 84 + 36 = 120 grams.
March 1, 2016

Math
Did you mean? 12a + 15p = 100.
March 1, 2016

Math
Suzanne: X min. Jim: (x+30)min. X = 1/3 * 60min = 20 min. x+30 = 20 + 30 = 50 min.
March 1, 2016

Banking Finance
Higher.
March 1, 2016

Algebra
P = Po(1+r)^n. Po = $3500, r = (6.75%/12)/100% = 0.005625 = Monthly % rate expressed as a decimal. n = 1Comp./mo. * 6mo = 6 Compounding periods. P = ?.
February 29, 2016

Algebra
P = Po(1+r)^n. Po = $500, r = (4%/4)/100% = 0.01 = Quarterly % rate expressed as a deci8mal. n = 4Comp./yr. * 6yrs = 24 Compounding periods. P = ?.
February 29, 2016

Algebra
P = Po(1+r)^n. n = 1Comp./yr. * 5yrs = 5 Compounding periods. P = 4000(1.06)^5 =
February 29, 2016

Math
P = Po(1+r)^n. Po = $850, r = Quarterly % rate expressed as a decimal. n = 4Comp./yr. * 10yrs. = 40 Compounding periods. P = 850(1+r)^40 = 1100, (1+r)^40 = 1100/850 = 1.294, Raise both sides to the 1/40 power: 1+r = 1.294^(1/40) = 1.00647, r = 1.00647 - 1 = 0.00647 = Quarterly...
February 29, 2016

math
P = Po(1+r)^n. r = Quarterly % rate expressed as a decimal. n = 4Comp./yr. * 2yrs = 8 Compounding periods. P = 3800*(1+r)^8 = 4300, (1+r)^8 = 4300/3800 = 1.132, 8*Log(1+r) = Log1.132, Log(1+r) = Log1.132/8 = 0.00673, 1+r = 10^(0.00673), r = 10^(0.00673) - 1 = 0.0156, APR = 4...
February 29, 2016

math
P = Po(1+r)^n. r = (2%/2)/100% = 0.01 = Semiannual % rate expressed as a decimal. n = 2Comp./yr. * 2yrs = 4 Compounding peri0ds. P = Po*(1.01)^4 = 12,500. Po = ?.
February 29, 2016

math
See previous post: Mon, 2-29-16, 2:12 AM.
February 29, 2016

math
P = Po(1+r)^n. r = (10%/2)/100% = 0.05 = Semiannual % rate expressed as a decimal. n = 2Comp./yr. * 10yrs = 20 Compounding periods. P = 100,000(1.05)^20 = $265,329.77. Repeat the above procedure for 15% and 20%.
February 29, 2016

math
Cost = 60 + 11.05*11 = $181.55 P = Po + Po*r*t = 181.55, 170 + 170*r*(11/12) = 181.55, 170 + 155.83r = 181.55, 155.83r = 11.55, r = 0.047 = 4.7%, APR.
February 29, 2016

Algebra 2
49^3x = 343^(x+1), 3x*Log49 = (x+1)*Log343, Divide both sides by Log49: 3x = (x+1)*Log343/Log49, 3x = 1.5*(x+1), 3x = 1.5x + 1.5, 3x-1.5x = 1.5, X = 1. So the 2x in your Eq should be x.
February 23, 2016

Algebra 2
49^3x = 343^(2x+1). 3x*Log49 = (2x+1)*Log343, Divide both sides by the Log of 49: 3x = (2x+1)*Log343/Log49, 3x = 1.5(2x+1), 3x = 3x+1.5, 3x-3x = 1.5. No solution? Please make sure the problem is copied correctly.
February 23, 2016

Calculus
The rate at which water flows into a tank, in gallons per hour, is given by a differentiable function R of time t. The table below gives the rate as measured at various times in an 8-hour time period. t---------0-----2------3-------7----8 (hours) R(t)--1.95---2.5---2.8----4.00...
February 23, 2016

Math
All angles are measured CCW from +x-axis. Vr = 55mi/h[55o] + 550mi/h[25o] = 31.5+45.1i + 498+232i = 530 + 277i = 598mi/h[27.6o]
February 23, 2016

Calculus
Use the graph of f(t) = 2t + 3 on the interval [-3, 6] to write the function F(x), where F(x)= ∫f(t) dt where a=3 b=x. F(x) = 2x^2 + 6x F(x) = 2x + 3 F(x) = x^2 + 3x + 54 F(x) = x^2 + 3x - 18 Honestly have no idea where to start. Do i take the derivative of that or what?
February 23, 2016

MATH
Both ordered pairs at D satisfy the Eq .
February 23, 2016

Math
9 min. = 0.15h, 22.5 min = 0.375h. d = (Va+Vs)*t = 1.5 km. (Va+Vs) * 0.15 = 1.5. Eq1: Va + Vs = 10. (Va-Vs)*0.375 = 1.5. Eq2: Va - Vs = 4. Add the two Eqs: Va + Vs = 10. Va - Vs = 4. Sum: 2Va = 14, Va = 7 km/h. In Eq1, replace Va with 7: 7 + Vs = 10 km/h, Vs = 3 km/h. Va = ...
February 22, 2016

Science
All angles are measured CCW from +x-axis. D = 118km[345o] + 118[125o] = 114-30.5i + -67.7+96.7i = 46.3 + 66.2i = 80.8km[55o].
February 22, 2016

MAth
P = Po + Po*r*t = $5,040. 4500 + 4500*0.06*t = 5040. t = ?.
February 21, 2016

Calculus
Yes and b are the lower and upper and I plugged in my value of 1 and got 2.59 but that's not one of my answers. My options are 12 6 4 1/9
February 21, 2016

Calculus
I don't know because thats what the question says. Thanks
February 21, 2016

Calculus
How would I set this up in my calculator? Let F(x)=∫ ln(t^2) dt where a= 1 and b=3x . Use your calculator to find F"(1). I set it up and I got way the wrong answer. I got 2ln(1)=0
February 21, 2016

Calculus
Pumping stations deliver gasoline at the rate modeled by the function D, given by D(t)= 6t/(1+2t) with t measure in hours and and R(t) measured in gallons per hour. How much oil will the pumping stations deliver during the 3-hour period from t = 0 to t = 3? Give 3 decimal ...
February 21, 2016

Calculus
A particle moves along the x-axis with velocity v(t) = sin(2t), with t measured in seconds and v(t) measured in feet per second. Find the total distance travelled by the particle from t = 0 to t = π seconds. Do I have to take the integral of the equation like ∫ sin(...
February 21, 2016

Calculus
f(x) and g(x) are a differentiable function for all reals and h(x) = g[f(2x)]. The table below gives selected values for f(x), g(x), f '(x), and g '(x). Find the value of h '(1). (4 points) x 1 2 3 4 5 6 f(x) 0 3 2 1 2 0 g(x) 1 3 2 6 5 0 f '(x) 3 2 1 4 0 2 g &#...
February 21, 2016

Math Fractions
Total = X pages. Monday: 1/6 * x = x/6 Pages read. x-x/6 = 6x/6 - x/6 = 5x/6 Remaining. Tuesday: 2/5 * 5x/6 = x/3 Pages read. 5x/6 - x/3 = 5x/6 - 2x/6 = 3x/6 Remaining. Wednesday: 1/3 * 3x/6 = x/6 Pages read. 3x/6 - x/6 = 2x/6 = x/3 Remaining. x/3 = 60, X = 180 Pages.
February 21, 2016

physcis
a. V = Vo + g*Tr = 0, Tr = -Vo/g = -20/-32 = 0.625 s. = Rise time. Tf = Tr = 0.625 s. = Fall time from max ht. to top of bldg. h = Vo*T + 0.5g*T^2. h = 60 Ft., Vo = 20 Ft/s, g = 32 Ft/s^2, T = ?. Tr+Tf+T = Time to reach gnd. b. V^2 = Vo^2 + 2g*h. Vo = 20 Ft/s, g = 32 Ft/s^2, h...
February 21, 2016

Calculus
Compare the rates of growth of f(x) = x + sinx and g(x) = x as x approaches infinity. f(x) grows faster than g(x) as x goes to infinity. g(x) grows faster than f(x) as x goes to infinity. f(x) and g(x) grow at the same rate as x goes to infinity. The rate of growth cannot be ...
February 20, 2016

Calculus
Which of the following functions grows the fastest as x goes to infinity? 3^x ln(x) e^4x x^10 I put e^4x but I thought that 3^x might have been it too. I know for sure that it is not ln(x) and x^10 because those grow much slower.
February 20, 2016

Calculus
Which of the following functions grows the slowest as x goes to infinity? x^e e^x ex they all grow the same rate. I think it is c because it does not have any exponents.
February 20, 2016

Calculus
The graph of f ′(x) is continuous and decreasing with an x-intercept at x = 0. Which of the following statements is false? (4 points) The graph of f has an inflection point at x = 0. The graph of f has a relative maximum at x = 0. The graph of f is always concave down. ...
February 20, 2016

Physics
Oops!! Please disregard my first post. First Student: Xo = Cos60.34 = 0.4949 Yo = sin60.34 = 0.8690 Y = Yo + g*Tr = 0, Tr = -Yo/g = -0.8690/-9.8 = 0.0887 s. = Rise time. Tf = Tr = 0.0887 s. T = Tr+Tf = 0.0887 + 0.0887 = 0.1774 s. = Time in air. Dx = Xo*T = 0.4949 * 0.1774 = 0....
February 20, 2016

Physics
Xo = Cos60.34 = 0.4949 Yo = sin60.34 = 0.8690
February 20, 2016

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