Monday
May 2, 2016

# Posts by Francisco

Total # Posts: 18

Statistics
The mean grade in this class last semester was 78.3, and the variance was 49 . The distribution of grades was unimodal and symmetrical. Using this information determine the probability that “Joe”, a random student you know nothing about, other than the fact that they...
February 25, 2016

calculus
The radius of a right circular cylinder is given by sqr( t + 6) and its height is 1/6 sqr(t) , where t is time in seconds and the dimensions are in inches. Find the rate of change of the volume with respect to time.
February 23, 2016

CHEMISTRY
^H FOR CS2+3O>CO2+2SO2
December 17, 2015

fibers and fabrics
To remove a coffee stain from a cotton shirt, you should
October 15, 2015

Algebra
how to find th equation that passes though (1,3) and (8,5) is there a formula to find the answer>
January 20, 2015

physics
A car traveling in a straight line has a velocity of 3.19 m/s at some instant. After 5.4 s, its velocity is 12 m/s. What is its average acceleration in this time interval?
September 29, 2014

math
Thank you
February 11, 2014

math
648 = 9x ÷9 ÷9 72 = X
February 11, 2014

math
A pole 12 feet tall casts a shadow 9 feet long. How tall is a tree that casts a shadow 54 feet long?
February 11, 2014

8×6×2×1 I think
February 11, 2014

Physics
The modern Boeing 747 passenger jet airplane cruises at a speed up to 900 km/hr, at an altitude of 11,000 m. The cabin pressure is maintained equivalent to the atmospheric pressure at an altitude of 2,000 m. This is called the "cabin altitude". The pressure as a ...
January 27, 2013

Physics
On a particular airplane wing, air flows over the upper surface with a speed of 115 m/s and along the bottom surface with a speed of 90 m/s during flight. If the area of the wing is 140 m^2, what is the lift force on the wing? Air density is 1.29 kg/m3.
January 27, 2013

science/physics
A 230kg ball moving at velocity of 25m/s collides with a 420 kg ball that is not moving. What is the final velocity after contact
February 5, 2012

math
9+8log9 (9X)=81
December 6, 2010

Economics
it will increase, and then decrease
November 11, 2009