Solve the problem.Jeff studied math for 
history for 
and physics for 
How long did he study?
A. 3 hr
B. 
hr
C. 
hr
D. 9
hr
Answer: D
Mathematics
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Find the perimeter of the figure.
A. 
yd
B. 
yd
C. 
yd
D. 
yd
Mathematics
Determine whether the relations represent functions. Identify the domain and range of each relation.
A. function domain: [3, ?) range: (-?, ?) B. not a function C. function domain: [0, ?) range: (-?, ?) D. function domain: (-?, ?) range: [3, ?)
Mathematics
Decide what number must be added to the binomial to make a perfect square trinomial.x2 - 
x
A. 
B. - 
C. - 
D. 
Mathematics
Solve the problem.How long will it take for the population of a certain country to double if its annual growth rate is 
? Round to the nearest year.
A. 28 yr B. 80 yr C. 1 yr D. 12 yr
Mathematics