Thursday

April 24, 2014

April 24, 2014

Total # Posts: 8,535

**physics**

a. V^2 = Vo^2 + 2a.d a = (V^2-Vo^2)/2d. a = (6.14-0)/26.8 = 0.229 m/s^2 b. a = 0.229*cos 32.6 = 0.193 m/s^2, c.

**physics**

tan A = Y/X = -558/925 = -0.60324 A = -31o D = 925/cos(-31) = 1080 m.

**physics**

See Related Questions: Tue,6-18-13,9:43PM.

**math**

translate the phrase into a mathematical expression and then evaluate it. sixtten squared divided by four cubed. The given expression in symbols is? (do not simplify. type exponential notation with positive exponents.) Evaluated, the expression is equal to? (simplify your answer)

**Physics**

x/0.017 = 22/1 X = 0.374 N. Work=F*d = 0.374 * 0.017=0.0064 Joules.

**science**

P = V*I = 2000 W. 220I = 2000 I = 9.09 Amps. The current too high for the circuit. If the circuit is properly protected, the fuse will blow or the circuit breaker will trip.

**Math**

I = Po*r*t = $23. 820*(r/360)*52 = 23 118.44444r = 23 r = 0.194 = 19.4 %.

**math**

P = Po(1+r)^n P = 8000+1261 = 9261. Po = 8000. n = 1comp./yr. * 3 yrs. = 3 Compounding periods. r = ? 8000(1+r)^3 = 9261. Divide both sides by 8000: (1+r)^3 = 1.157625. Take cube of both sides: 1+r = 1.05 r = 0.05 = 5% per yr.

**math**

P = Po + Po*r*t = 2600 2000 + 2000*(0.06/360)t = 2600 2000 + t/3 = 2600 t/3 = 2600-2000 = 600 t = 1800 Days. t = 1800Days / 360Days/yr. = 5 Yrs. Ordinary int. is based on 360 days/yr.

**business math**

C = 0.026*60000 + 0.034*(89400-60000) C = 1560 + 999.60 = $2559.60.

**physics**

tan A = Y/x = -4/2 = -2.0 A = -63.43o = 63.43o South of East. tan(-63.43) = d/10m d = 10*tan(-63.43) = -20 m = 20 m. South of starting point.

**physics**

V^2 = Vo^2 + 2g*d. Vo = 12 Ft/s. g = 32FT/s^2. d = 4.5 Ft. Plug the given values into the Eq and solve for V in Ft/s.

**physics**

V = Vo + a*t a = (V-Vo)/t a=(300-150)/(1/12)h=1800=1800 mi/h^2 V^2 = Vo^2 + 2a*d d = (V^2-Vo^2)/2a. d = (90000-22500)/3600 = 18.75 Miles.

**trig**

A + B = 90o A + 31 = 90 A = 59o. c*sin 59 = 3. c = 3/sin59 = 3.50 tan 59 = 3/b b = 3/tan 59 = 1.80

**Math 116**

See previous post.

**Math 116**

Multiply Eq1 by -6: -6x - 18y = -30 +6x - 6y = 14 Add the Eqs: -24y = -16 Y = 2/3. In Eq1, replace Y with 2/3: x + 3*2/3 = 5 x + 2 = 5 X = 3.

**Math 116**

Eq1:-6x - 2y = 12 Eq2:12x - 4y = -24 Multiply Eq1 by -4 and Eq2 by 2: 24x + 8y = -48 24x - 8y = -48 Add the Eqs: 48x = -96 X = -2. In Eq1, replace X with -2: -6*(-2) - 2y = 12 12 - 2y = 12 -2y = 12-12 = 0 Y = 0 (-2,0).

**Math Algebra1A**

Those are the only 2 that I know.

**grade 4 math**

10^x = 59,187 Take Log of both sides: x*Log 10 = Log 59187 X = Log59187/Log 10 = 4.77223. 10^4.77223 = 59187.

**math**

Monthly Salary = $X. Spends1/4 * $X = X/4. Bal. = X-X/4 = 3x/4. Spends1/5 * 3x/4 = 3x/20 Bal.=3x/4-3x/20 = 15x/20-3x/20=12x/20= 3x/5. Transportation: 1/10 * 3x/5 = 3x/50 Bal.=3x/5 - 3x/50 = 30x/50-3x/50=27x/50. 27x/50 = 630 27x = 31500 X = $1166.67.

**physics**

See previous post.

**physics**

See previous post.

**physics**

Vavg. = (30+45)/2 = 37.5 km/h.

**algebra**

Vb + Vc = 22 Vb - Vc = 8 Add the Eqs: 2Vb = 30 Vb = 15 mph. Replace Vb in Eq1 with 15: 15 + Vc = 22 Vc = 7 mph = Velocity of the current.

**Math**

787/9 = 87 Strawberries/carton. Bal. = 87 * 5 = 435 Strawberries 435strawberries/5strawberries/carton = 87 Cartons.

**physics**

h = 0.5g*t^2 = 81.6 m. 4.9t^2 = 81.6 t^2 = 16.65 t = 4.08 s. to hit ground. d = 9.13-4.30 = 4.83 m. = Distance the boat traveled in 4.08 s. Speed = d/t = 4.83/4.08 = 1.18 m/s.

**Physics**

Vo=a*t = 4i7 * 0.0475 = 19.8 m/s[59.70]. a. Xo = 19.8cos59.7 = 10 m/s. b. Yo = 19.8sin59.7 = 17 m/s.

**physics**

See Related Questions:Sun.6-16-13,11:00 PM.

**Math**

A. $3800-200 = $3600 = Variable cost. $3600/20Boards = $180/board. C(x) = 180x + 200.

**physics**

d1 = d2 44(t+0.7) = Vo*t + 0.5a*t^2 44t + 30.8 = 15t + 2.5t^2 2.5t^2 + 15t-44t-30.8 = 0 2.5t^2 -29t - 30.8 = 0 Use Quadratic Formula and get: t = 12.6 s. -

**physics**

V^2 = Vo^2 + 2g*d V^2 = 0 + 19.6(51.5-12.9) = 756.56 V = 27.5 m/s. d = Vo*t + 0.5g.t^2 = 12.9-1.6 = 11.3 m d = 27.5*t + 4.9t^2 = 11.3 4.9t^2 + 27.5t - 11.3 = 0 Use Quadratic Formula and get: t = 0.385 s.

**Physics**

Total Energy = KE + PE = 0.5m*V^2 + mg*h = 2*400 + 4*9.8*50 =

**Finance**

Correction: t = 180 Months.

**Finance**

P=1626.83 * 15yrs. * 12mo./yr.=292829.40 P = (Po*r*t)/(1-(1+r)^-t) = 292829.40 r = (4%/12)/100% = 0.00333 = Monthly % rate expressed as a decimal. t = 15yrs. * 12mo/yr. = 189 Months. (Po*0.00333*180)/(1-(1.00333)^-180)= 292,829.40 0.5994Po/0.45031 = 292829.40 1.33108Po = 29282...

**math**

3*8/6/7 = 24/6/7 = 4/7 = 0.571

**math**

How often is it compounded?

**Math**

P = Po(1+r)^n. r = 11%//100% = 0.11 = Annual % rate expressed as a decimal. n = 1comp./yr. * 14yrs.=14Compounding periods. Plug the above values into the given Eq and solve for P.

**physics**

D = Do + (V^2-Vo^2)/2a. D = 24.1m/s*0.366s + (0-(24.1)^2/-16 = 8.82 + 36.3 = 45.1 m.

**physics**

a. a = (11.3-0)/3.72 = 3.04 m/s^2. b. d = 0.5*3.04*(3.72)^2 = 21.0 m.

**physics**

c. d2-d1 = 25.5-9.48 = 16.0 m.

**physics**

a. a = (V-Vo)/t = (5.64-0)/3.36=1.68 m/s^2. d1 = 0.5a*t^2 = 0.5*1.68*(3.36)^2=9.48 m. b. a = (39.8-24.6)/3.36 = 4.52 m/s^2. d2 = 0.5*4.52*(3.36)^2 = 25.5 m. c. d2 d1 = 25.5 9.48 = 16.0 m.

**physics**

a. V = Vo + at. t = (V-Vo)/a = (49.4-39.4)/4.06 =

**Math**

P = Po(1+r)^n. r = (4.2%/2)/100% = 0.021 = Semi-annual % rate expressed as a decimal. n = 2comp./yr * 4yrs. = 8 Compounding periods. P = Po(1.021)^8 = 1400 Po = 1400/(1.021)^8 = $1185.56

**math**

P = Po(1+r)^n r = (5.6%)/12)/100% = 0.00467 = Monthly % rate expressed as a decimal. n = 12comp/yr. * 3yrs. = 36 Compounding periods. P = 3700(1.00467)^36 = $4375.68. Int. = P-Po = 4375.68-3700 = $675.68

**physics**

h = -3.93t * 4.9t^2 = 4.91 m. 4.9t^2 - 3.93t - 4.91 = 0 Use Quadratic Formula and get: t = 1.48 s.

**physics**

F = m*a = 89 * 0.29 = 25.8 N. d = 25.8N/2100N * 1m = 0.0123 m.

**Physics**

Va = 5400rev/min*1min/60s*6.28rad/rev = 565.2 rad/s. t = (12rev/5400rev) * 60s = 0.133 s. V = Vo + at = 0 at = -Vo a = -Vo/t = -565/0.133 = -4248 rad/s^2.

**math**

ht = X Ft. Base = X-5) Area = B/2 * h = 42. (x-5)/2 * x = 42 (x-5)x = 84 x^2-5x = 84 x^2-5x-84 = 0 (x+7)(x-12) = 0 X = -7, and 12 Ft. = ht. Base = 12-5 = 7 Ft.

**physics**

a=(V-Vo)/t = (-40-25)/0.01=-6500 m/s^2. F = m*a = 0.055 * -6500 = -358 N.

**GEOMETRY I BEG YOU PLEASE HUHUHU**

-sqrt(7) = -2.65 Y(-2.65,6), W(-2,3), h(5,12). W is between y and h.

**math**

tan35 = h/360. h = 360*tan 35 = 252 Ft.

**Intermediate algebra, concepts and graphs**

Step 1: h = -16t^2+64t+80=128.

**Intermediate algebra, concepts and graphs**

Step 1: h = -16t^2+64t+80=128.

**Intermediate algebra, concepts and graphs**

t^2-4t-5=-8 (t-1)(t-3)=0

**Intermediate algebra, concepts and graphs**

t^2-4t-5=-8

**Intermediate algebra, concepts and graphs**

My post was rejected.

**Physics**

V = d/t = 80/2 = 40 mi/h.

**PLEASEEE GEOMETRY**

H(-4,5). J(-1,10). I(1,sqrts). Point J is between H and I.

**geometry**

Answer: D.

**GEOMETRY**

O = 3*sqrt(2) = 4.24. N = 2*sqrt(5) = 4.47. M = 5. N is between O and M.

**physics**

Zero Degrees.

**Geometry**

post it.

**Geometry**

As = pi*r^2 + pi*D*h As = 3.14*100 + 3.14*20*42 = 2953 m^2.

**physics**

Zero Degrees.

**power dissipation please help**

P = V*I = 2 * 20 = 40 mW. = 0.04 W.

**transformers**

Z1 = (25)^2 * 2x = 1250k Ohms I1 = 50/1250k = 0.04 mA.. i

**physics**

See previous post.

**physics**

See previous post.

**physics**

See previous post.

**physics**

See previous post.

**physics**

See previous post.

**physics**

V^2 = Vo^2 + 2ad a=(V^2-Vo^2)/2d=(900-0)/7400=0.122 m/s^2 d2 = 30m/s * 410s = 12300 m. d3 = (V^2-Vo^2)/2a d3 = (0-900)/-0.130 = 6923 m.

**Physics**

Shorted.

**Math**

1. The diagonal divides the rhombus into 2 congruent triangles. The altitude bisects the diagonal. (16/2)^2 + Y^2 = 10^2 Y^2 = 100-64 = 36 Y = 6 = Altitude. Area = 2(16/2 * 6) = 96 in^2.

**Math**

2. Decagon: 10 sides. Area = 2.94*r^2 = 2.94*4^2 = 47 cm^2.

**College Level Physics**

d = 2.5m/s * 6min*60s/min = 900 m. Work = F*d = 145cos30 * 900 = 443,856 J. = 444 kJ.

**Algebra**

x^2/12 + 11x/9 = 300 Multiply both sides by 36: 3x^2 + 44x = 10800 3x^2 + 44x - 10800 = 0 Use Quadratic Formula: X = 53.1 mi/h.

**math**

P = Po(1+r)^t P = 1320(1.08)^5 = 1940 Students.

**math**

Correction: Biweekly Gross = 38400/26 = 1476.92

**math**

Annual Gross = 24 * 1600 = $38400. Biweekly Gross = 38600/26 = 1476.92

**Physical Science**

1. V = L*F = 0.01*5 = 0.05 m/s=50 mm/s. 4. Changes speed.

**Math>> Help!!**

Tan A = Y/X = 4/3 = 1.3333. A = 53.13o. h = 20*sin53.13 = 16 Ft.

**Please Help!! Math**

Depth = X Ft. Width = 2X Ft. Length = 4X Ft. Vol. = 4x*2x*x = 1728 Ft^3 8x^3 = 1728 x^3 = 216 X = 6 Ft. 2X = 12 Ft. 4X = 24 Ft.

**HELP!!! Math**

Width = X Ft. Length = 3X/2 Ft. Area = (3x/2) * X = 15,000 Ft^2 Multiply both sides by 2: 3x * x = 30.000 3x^2 = 30000 x^2 = 10000 X = 100 Ft^2. 3x/2 = (3*100)/2 = 150 Ft^2

**Business**

If a family planned to spend $370 for food during March but only spent $344, this difference would be referred to as a:

**Math**

E. None of these.

**Physics**

Please clarify your problem, and show all units.

**physics**

A car moving with a velocity of 24meters per seconds,acceleration for 15seconds at a rate of 1meter per second square,calculate the final velocity of the car

**math**

0.6*8 = 4.8 0z of sugar. 8-4.8 = 3.2 oz of water. Sugar = 5%. %Water = 100-5 = 95. (3.2+w)/(4.8 + (w+3.2)) = 0.95 Cross multiply: 3.2+w = 4.56+0.95w+3.04 w-.95w = 4.56+3.04 0.05w = 7.6 W = 88 oz. of water added.

**Algebra**

See previous post.

**physics**

0.5g*t^2 = 40. 4.9t^2 = 40 t^2 = 8.16 t = 2.86 s.

**Physics**

a = (V-Vo)/t = (10-0)/5 = 2 m/s^2.

**finance**

D.

**physics**

Ri = (102-92)/(31.9-10.3) = 0.463 Ohms, internal resistance. E = 102 + 10.3*0.463 = 107 Volts. Or E == 92 + 31.9*0.463 = 107 Volts.

**math**

Cost = 80*3.50 = $280. 0.9*80 = 72 Sold. 72*P = 1.6*280 P = $6.22 = Selling price per dinner.

**algebra**

(x^2z^5)/(x^6z^4) = X^-4*Z = Z/X^4.

**Math**

Incomplete.

**Science**

P1*V1 = P2*V2 V2 = (P1/P2) * V1.

**physics**

See Related Questions: Sat,6-1-13,10:49 Am.

**physics**

Correction: Dc = 0.7g/cm^3.

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