Wednesday

July 23, 2014

July 23, 2014

Total # Posts: 8,897

**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.

**physics**

Vb = 0.7 * 20^3 = 5600 cm^3. = Vol. below surface. Vb = (Dc/Dw) * Vc. = 5600 (Dc/1) * 20^3 = 5600 Dc = 5600/20^3 = g/0.7 cm^3 = Density of the cube of wood. 1. Mass of cube = 20^3cm^3 * 0.7g/cm^3= 5600 Grams. = 5.6 kg. To totally submerge the block, its' density must be in...

**math**

Cost = 200*2.45 = $490. 0.95*200 = 190 Sold. 190*P = 1.40*490 P = $3.61 = Selling price per cake.

**algebra**

Chair A: (79.99/119.99 )-1 = -0.333 = -33.3%. The negative sign means "down". Chair B: (89.99/149.99)-1 = -0.400 = -40%. Mat = 0.85*29 = $24.65 Leather protection = $19.95 Total Cost = (89.99+24.65+19.95)*1.063= $143.07.

**algebra**

Chair A: (79.99/119.99 )-1 = -0.333 = -33.3%. The negative sign means "down". Chair B: (89.99/149.99)-1 = -0.400 = -40%. Mat = 0.85*29 = $24.65 Leather protection = $19.95

**Physics**

Incomplete.

**math**

C1 = 2*8.99/3 = $5.99 each with markdown C2 = 8.99 Each, Without markdown. (5.99/8.99)-1 = -0.3337 = -33.4% Or 33.4% Markdown. The negative sign means markdown.

**Math**

1. 7x = 58-142 = -84 X = -12. 2. 5x = -44-96 = -140 X = -28. 3. -26 = -7x+8x-16 -26 = x-16 x = 16-26 = -10 4. Similar to #3. 5. Similar to #1. 6.

**Math**

1. x+9 = 11 X = 11-9 = 2. The remaining problems are similar.

**math**

See 8:53pm post.

**Finance**

P = (Po*r*t)/(1-(1+r)^-t) Po = 125000-25000 = $100000. r = (9%/12)/100% = 0.0075 = Monthly % rate expressed as a decimal. Po*r*t = 100000*0.0075t = 750t P = 1000t. P = 750t/(1-1.0075^-t) = 1000t Divide both sides by 750t: 1/(1-1.0075^-t) = 1.333 Cross multiply: 1.333(1-1.0075^...

**alegebra**

a.(42200-5100)/60 = $618.33 Per Month. b. Po = 42200-5100 = Amount Financed. P = (Po*r*t)/(1-(1+r)^-t) r = (2.5%/12)/100% = 0.002083 = Monthly % rate expressed as a decimal. t = 60 months. Plug the above values into the given Eq and get P = $39,505.80. Monthly = P/60.

**alegebra**

a.(42200-5100)/60 = $618.33 Per Month. b. Po = 42200-5100 = Amount Financed. P = (Po*r*t)/(1-(1+r)^-t) r = (2.5%/12)/100% = 0.002083 = Monthly % rate expressed as a decimal. t = 60 months. Plug the above values into the given Eq and get P = $39,505.80. Monthly = P/60.

**alegebra**

a.(42200-5100)/60 = $618.33 Per Month. b. Po = 42200-5100 = Amount Financed. P = (Po*r*t)/(1-(1+r)^-t) r = (2.5%/12)/100% = 0.002083 = Monthly % rate expressed as a decimal. t = 60 months. Plug the above values into the given Eq and get P = $39,505.80. Monthly = P/60.

**maths**

Total = $X. Oldest = $2x/7. 2nd Oldest = 3/5 * 5x/7 = $3x/7. 3rd = $x/7 = $120. 4th = $x/7 = $120. x/7 = 120 X = $840.

**math**

a. In the given Eq, replace X with 3 and solve. Multiply the results by 100. b. Same procedure as "a".

**Math**

Correct.

**math**

sin7o = 1000/L L=1000/sin7 = 8206 Ft=Line of site(hyp) L' = 8206 - 0.7*5280 = 4510 Ft. h = 4510*sin7 = 550 Ft.

**math**

h = 45*sin5 = 3.92 Tt. = 47 In.

**Science**

V = Vo + a*t = 50 m/s. 0 + 2t = 50 t = 25 s.

**physics**

D = 5km[45o] + 4km[30o] + 2km[-60o]. X = 5*cos45 + 4*cos30 + 2*cos(-60)=8 km. Y=5*sin45 + 4*sin30 + 2*sin(-60)=3.80km. tanA = Y/X = 3.80/8 = 0.47544 A = 25.4o D = 8/cos25.4 = 8.86 km.

**scientific notation am i doing it right?**

1. Correct. 2. 9.82*10^5 = 982000. 3. 9*10^-3 = 0.009 4. Correct.

**physics**

Fe = m*g = 400kg * 9.8N/kg = 3920 N. = Force of elevator. P = F * V = 3920 * 0,03 = 117.6 Joules/s = 117.6 Watts.

**math**

P = 1.39(1+0.005)^12 = $1.48.

**algebra**

Correction: 1. 7x/(x^2-4) = 7x/(x+2)(x-2). When X = +-2, the denominator = 0. Therefore, +-2 are not in the domain. Domain: All real values of X except +-2.

**algebra**

1. g(x) = 7x/(x^2-4) x^2-4 = 0 x^2 = 4 X = +- 2. Domain: -2 <X< 2. 2. F(x) = 5x*sqrt(x-2). 2 <=X< +Infinity.

**algebra**

(f-g)(x)= (2x+1)-(7x-1) = 2x+1-7x+1 = -5x+2. Domain: All real values of x. (f/g)(x) = (2x+1)/7x-1) 7x-1 = 0 7x = 1 X = 1/7 When X = 1/7, the denominator = 0 which is forbidden. Therefore, the domain is all real values of X except I/7. 1/7 <X< 1/7.

**math**

a. C = 0.50x + $50. b C = 0.50x + 50 = 80 0.5x = 80-50 = 30 X = 60 miles. c. Solve the Eq using several values of x.

**math**

Please clarify your problem and include all of the information.

**physics**

A = 73[5.5o]. X = 73*cos5.5 = 72.66 Units.

**physics**

d1 = d2. 28.8t = 0.5*2.03*t^2 28.8t = 1.015t^2 1.015t^2 - 28.8t = 0 Use Quadratic Formula and get: t = 28.4 s.

**physics**

h = Vo*t + 0.5g*t^2 = 67 m. 0 + 4.9t^2 = 67 t^2 = 13.67 Tf = 3.7 s = Fall time. d = Vo*Tf = 5.33m/s * 3.7s = 19.7 m.

**math**

how much will i have to pay back on 3200 dollars intrest rate 9% for a yr an a half

**algebra**

Please check your Eq for errors. My solution is based on the assumption that the 28t term is correct. V = Vo + g*Tr Tr = (V-Vo)/g = (0-28)/-9.8 = 2.86 s. = Rise time. Tf = Tr = 2.86 s. = Fall time. T = Tr + Tf = 2.86 + 2.86 = 5.72 s. = Time in air.

**physics**

D = Vo*t + 0.5a*t^2 D=5.9*19.5 + 0.5*2.12*(19.5)^2= 518 m.

**physics**

a1 =(V-Vo)/t = (25.9-0)/7.6 = 3.4 m/s^2. a2 = (15.4-25.9)/5 = -2.1 m/s^2. a=(a1+a2)/2=(3.4 + (-2.1))/2=0.65 m/s^2.

**Physics**

a=(V-Vo)/t = (-2-4.5)/0.3=-21.67 m/s^2

**math**

Y = 2x + 1 Slope = 2. Parallel lines have equal slopes. 1.m = -A/B = -4/-2 = 2. 2. Standard Form: -x + 2y = 4. m = -A/B = 1/2. 3. -2x + y = 6 m = 2/1 = 2. Note: All lines with a slope of 2 ARE parallel. 4. 2x - y = 4 m = -2/-1 = 2.

**algebra**

a. h = 50*1 - 16*1^2 = 34 Ft. b. V = Vo + g*t Tr = (V-Vo)/g = (0-50)/-32 = 1.56 s. = Rise time. Tf = Tr = 1.56 s. = Fall time. T = Tr + Tf = 1.56 + 1.56 = 3.125 s. = Time t0 return to earth. t

**So confusing! Help Math.**

Holly, what does the bar over the o mean?

**Math**

51. X^3/0.3^-3 = 125 0.3^3X^3 = 125 X^3 = 125/0.3^3 X^3 = 5^3/0.3^3 X = 5/0.3 X = 16.66666667. 67. e^3x = 8 3xLne = Ln8 3x*1 = Ln8 X = Ln8/3. 68. 1/e^x = 7 e^x = 1/7 x*Ln e = Ln 1/7 x*1 = Ln 1/7 X = Ln 1/7. 69. 3e2x+2 = 50 6ex = 48 X = 48/6e = 8/e = 2.943 70. |Ln x| = 1 Ln x =...

**physics**

D = 0.5a*t^2 = 5*5^2 = 125 m.

**math**

cos72 = NP/MN = 4/MN MN = 4/cos72 = 12.94 m. = Length of wire to point N. tan72 = MP/NP = MP/4 MP = 4*tan72 = 12.31 m. sin65 = MP/LM = 12.31/LM LM = 12.31/sin65 = 13.58 m. = Length of wire to point L.

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