A school of engineering requires all students to purchase a personal computer. Forty percent of the computers purchased are brand X and 60% brand Y. Of brand X 35% have hard disks and 60% brand Y have hard disks. An engineering student is selected at random.(a) Find the probability it is a student who owns a brand X computer with a hard disk.(b) Find the probability it is a student who owns a brand Y computer with a hard disk.(c) Find the probability it is a student who owns a computer with a hard disk.
What will be an ideal response?
(a) 0.14
(b) 0.36
(c) 0.50
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The growth rate G, in hundreds of cases per day, in the spread of an epidemic depends on the number S, in hundreds, of currently sick individuals. The relationship is given by
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.
A: Make a graph of G versus S. Include up to 4,000 currently sick people (corresponding to 
).B: There are two numbers of currently sick individuals that give a growth rate of 500 new cases per day (corresponding to 
). Find both of them.C: When there are no sick individuals, the growth rate is 0. There is a second level where the growth rate is 0. Find that number of currently sick people.
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Round your answer to two decimal places if necessary.
What will be an ideal response?
Evaluate the expression.(-7)2
A. -14 B. -49 C. 14 D. 49
Determine whether the number is prime, composite, or neither.2
A. Neither B. Composite C. Prime
Find the volume of the solid generated by revolving the region bounded by the given lines and curves about the 
. y = 
, y = 0, x = 1, x = 9
A. ?ln 9
B. 
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C. 
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D. 
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