Friday
April 18, 2014

Posts by Trev


Total # Posts: 5

statistics
The Intelligence Quotient (IQ) test scores for adults are normally distributed with a mean of 100 and a standard deviation of 15. What is the probability we could select a sample of 50 adults and find the mean of this sample is between 95 and 105?

Math
A children's game has a spinner that is equally likely to land on any 1 of 4 colors: red, blue, yellow, or green. Determine the probability of spinning a red both times on 2 spins. Explain your reasoning.

pre alg
(-4)cubed divided by (-2)cubed -3(-5)squared I got -67 am i correct?

Physics
A string has a mass per unit length of 7.00x10-3 kg/m and a length of 0.230 m. What must be the tension in the string if its second harmonic has the same frequency as the second resonance mode of a 2.05 m long pipe open at one end?

physics
if the volume of a penny is 0.423cm cubed , how deep would a 30ft diameter swimming pool have to be to hold one billion pennies? One billion * volume penny=volumeswimming pool but volumeswimming pool is equal to height*area so calculate height

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