# Posts by Nycw

Total # Posts: 10

**Calculus Help?!?!**

Megan bailed out of her plane at an altitude of 8000 feet, fell freely for 15 seconds, and then opened her parachute. Assume that the drag coefficients are a=0.1 for a free fall and a=1.6 with a parachute. When did she land(in seconds)?

*February 2, 2013*

**calculus 2**

Megan bailed out of her plane at an altitude of 8000 feet, fell freely for 15 seconds, and then opened her parachute. Assume that the drag coefficients are a=0.1 for a free fall and a=1.6 with a parachute. When did she land(in seconds)?

*February 1, 2013*

**calculus 2**

The curve y=sinh(x),0<=x<=1, is revolved about the x-axis. Find the area of the resulting surface.

*February 1, 2013*

**calculus 2**

Megan bailed out of her plane at an altitude of 8000 feet, fell freely for 15 seconds, and then opened her parachute. Assume that the drag coefficients are a=0.1 for a fee fall and a=1.6 with a parachute. When did she land(in seconds)?

*February 1, 2013*

**calculus**

The count in a bacteria culture was 600 after 10 minutes and 1100 after 30 minutes. What was the initial size of the culture?Find the doubling period. Find the population after 80 minutes. When will the population reach 13000?

*February 1, 2013*

**calculus 2**

The region bounded by y=e^(-x^2),y=0 ,x=0 ,x=1 and is revolved about the y-axis. Find the volume of the resulting solid.

*January 23, 2013*

**calculus**

Solve lim x->7+ as....sqrt(x-7)^3/(x-7). I found that it equals 0, but I don't know if I did everything right.

*September 3, 2012*

**Trig/Physics**

Hi, thank you so much. Everything I tried hit all around the borders, but just was not working out correctly. I really appreciate your help.

*July 18, 2012*

**Trig/Physics**

Hi, sorry it was 30 degrees North of East.

*July 18, 2012*

**Trig/Physics**

Joe walks 5 miles in the direction degrees North of East, and then 10 miles in the direction 20 degrees West of North. (a) How far is Joe from his starting position? (b) In what direction is Joe from his starting position?

*July 18, 2012*

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