In a particular suburb, 30% of the households have installed electronic security systems.  If a household is selected at random, what is the probability that this household has not installed a security system? 

The time-dependent deformation of clayey soil is explained using a classic model of a water filled cylinder with a spring at its center. In this example, the spring represents what element of the three-phase model?

The blows per six inches for an SPT test results are reported by your drillers as follows: (A) 50/3″, WOH (B) WOH, 50/3″ (C) 49, 48, WOH (D) 36, WOH You immediately note that one of the SPT N values reported is incorrect. That incorrect SPT N value is A, B, C or D?

Is the reaction represented by the energy diagram below exothermic or endothermic?  

Two data sets yield the following standard deviations.  Which data set is more consistent?   Data set 1:  standard deviation = 5.2                       Data set 2:  standard deviation = 6.1

Adult Americans (18 and older) were asked whether they use social media regularly. The following table is based on the results of the survey. What is the probability the person does not use social media given that they were between the ages 18 and 34?  Round your answer to three decimal places.   18-34 35-44 45-54 55+ Use social media 117 89 83 49 Do not use social media 33 36 57 66  

What is the oxidation state of II?

A footing has an ultimate bearing capacity of 9,000 psf. Assuming the footing is embedded 3 feet deep in a soil with a moist unit weight of 100 pcf. The gross allowable and net allowable bearing pressures will be? Ensure you utilize the standard bearing capacity for a shallow foundation.

You oversee the marketing department for a US based company.  The company has decided to expand into Canada and you have been tasked with marketing the product in Canada.  You receive the chart below to help decide if you need to make changes to the marketing strategies you currently use in the United States.  Suppose you decide to change the marketing strategy in Canada if the percent of access method in Canada differs by less than 10% from the United States.  Which digital access method strategies would be the same for the United States and Canada?  Choose all answers that apply. digital media access picture-1.jpg

The images shown below refer to a type of testing to determine the shear strength parameter of sand. What is the name of this test?