# Posts by nice

Total # Posts: 14

**Physics**

two vectors have unequal magnitudes. can their sum be zero? explain

*February 7, 2015*

**scienc**

answer is not 324

*March 18, 2013*

**math**

What is the sum of all the possible values of a for which 25x^2+(a−15)x+9 has exactly one distinct real root?

*March 13, 2013*

**math**

The difference of the cubes of two consecutive odd positive integers is 400 more than the sum of their squares. Find the sum of the two integers.

*March 10, 2013*

**calculus**

Evaluate lim x→−∞ (−7x/√x^2+14)+8

*March 8, 2013*

**physics**

Gymnasts can do all sorts of ridiculous tricks on various equipment. In the rings event, the gymnast is supported by two rings attached by cords to the ceiling (see a picture here). If a gymnast weighs 75 kg and is motionless on the rings, what is the tension in each cord?

*March 5, 2013*

**physics**

Tiger Woods can hit a golf ball quite hard. A golf ball just after being hit by Mr. Woods has a kinetic energy of 100 J and a momentum of 3 kg m/s. What is the mass of the golf ball in grams?

*March 5, 2013*

**physics**

A mouse runs 3 m east and 4 m north in 5 seconds. What is the magnitude of the mouse's average velocity during its run in m/s?

*March 5, 2013*

**math**

Out on my street, there are a certain number of pigeons sitting on telephone poles. If there were exactly 2 pigeons sitting on each telephone pole, then 1 pigeon would have no space to sit on. If there were exactly 3 pigeons sitting on each telephone pole, then there would be ...

*March 5, 2013*

**math 6**

Jordan has 4/5 as many DVDs as Joseph means joseph has more DVDs than Jordan. number of joseph's DVDs * 4/5 = 56 so number of joseph's DVDs= 56 * 5/4 = 70

*January 22, 2013*

**Chemistry**

how did you get that???

*January 11, 2013*

**math**

To pass her English Test, Lucille must get 75% of the items correct. Out of 80 questions, how many must she correctly answer?

*September 15, 2011*

**social studies**

Idk

*April 14, 2011*

**General mathematics**

A population starts with 1000 individuals and triples every 80 years. a. give an exponential model for this situation b. what is the size of the population after 100 years?

*November 3, 2009*

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