Are the fish in danger (show why or why not)?
A soft drink bottling plant discharges a wastewater with a dissolved solids concentration of 10,000 mg/l NaCl, at a rate of 100 gal/min to a stream. The stream above the discharge has a volumetric flowrate of 1.0 MGD and a dissolved solids concentration of 25 mg/l. Below the discharge point is a prime fishing spot, and the fish are intolerant of salt concentrations above 200 ppm.
What will be an ideal response?
1,280 ppm of NaCl ? 200 ppm, so the fish are in danger.
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A box contains three cards, labeled 1, 2, and 3. Two cards are chosen at random, with the first card being replaced before the second card is drawn. Let X represent the number on the first card, and let Y represent the number on the second card.
a. Find the joint probability mass function of X and Y.
b. Find the marginal probability mass functions 
(x) and 
(y).
c. Find 
and 
.
d. Find 
.
e. Find Cov(X, Y).
What did the Land Grant Act (Morrill Act) establish?
What will be an ideal response?
When load testing a battery, which battery rating is usually used to determine how much load to apply to the battery?
A) CCA B) RC C) CA D) MCA
What use is NM cable suitable for?
A) Underground burial B) Wet or oily locations C) Dry locations only D) Wet or dry locations