# Yahoo Web Search

1. Sort by

1. ### Cylinder Volume Question??? (Picture attached)?

Let H cm be the height of the can when R=4.2 cm, then piHR^2=725 => H=725/(17.64pi... the height is reduced by 1 cm, (r+4.2)^2=1/(1/17.64-pi/725) => r=1/sqr(1/17.64-pi/725...

2 Answers · Science & Mathematics · 05/05/2019

2. ### Circle Gemonrety Math Problem Help??

a) The circumference of a circle is 2πr, so Quinn ran (3/4)(2π)(32 m) = 151 m (rounding to ...

1 Answers · Science & Mathematics · 12/06/2019

3. ### A rocket of total mass 500kg on the earth surface is to be launched into space, calculate the K.Energy required of it to escape into space.?

... = KE = ½mV² = ½(500)(√(2GM/r))² = 250(2GM/R) = 500(3.98e14) / (6.37e6) = 3.12e10 J...

3 Answers · Science & Mathematics · 01/08/2019

4. ### I need help with a trigonometry question?

θ is in Q4 r = √80 = 4√5 (Pythagoras) sinθ = -8/[4√5] = [-2√5]/5 = (-2/5)√5 cosθ = 4/[4√5] = [√5]/5 secθ = 5/√5 = √5 sinθ + secθ = (1-2/5)√5 = 0.6√5 k = 0.6

2 Answers · Science & Mathematics · 28/04/2019

5. ### Math circle geometry problem?

5.62 = 2 * pi * r * 105/360 2.81 = pi * r * 15 * 7 / (15 * 24) 2.81 = pi * r * 7/24 2.81 * 24 / (7 * pi) = r r = 3.0666883891764061269295774290978 3.07 cm

2 Answers · Science & Mathematics · 16/06/2019

6. ### Trig ratios help!?

... of Circle / 2*radius Circumference = 2π*r Given r = 1 for the unit circle Given Arc Length...

1 Answers · Science & Mathematics · 16/11/2019

7. ### Math Problem Help? Circle Geometry?

Circumference is 2 *Pi * r = 2 * 3.14 * .75 = 1.5 * 3.14 = 4.71 circle has 360 degrees so the path is 85/360 percent of the circumference 85 / 360 * 4.71 = 1.11

1 Answers · Science & Mathematics · 16/06/2019

8. ### Find the area of the sector in a circle with radius of 6 cm and a central angle of 90°??

Area A = π r² ......radius r = 6 cm ......A = π (6 cm)² ......A = 36π cm² There...

5 Answers · Science & Mathematics · 16/06/2019

9. ### Calculus- Economics?

...minus cost. So when at full capacity, the revenue and costs are: R() = 150 * 460 R() = 69000 C() = 72.5 * 150 C() = 10875 For...

3 Answers · Science & Mathematics · 25/06/2019

10. ### Calculate the enthalpy of reaction for the cracking of butene, as represented by the following equation?

pisgachemist is correct in that to actually calculate the enthalpy change for this reaction using enthalpies of formation, you do need to know specifically which isomer of butene you are beginning with. If you know that, his answer is absolutely correct. There...

2 Answers · Science & Mathematics · 05/06/2019