The rate of change 
of the total number, in thousand of articles, of research articles in the prominent journal Physics Review written by researchers in Europe is shown in the graph, where t is time in years 
represents the start of 1983). Use both left and right Riemann sums with 8 subdivisions
to estimate the total number of articles in Physics Review written by researchers in Europe in the 16-year period beginning 1983. (Estimate each value of 
to the nearest 0.5). Use the sums to obtain an estimate of 
.
? 
?
A. 9,000 articles
B. 50,500 articles
C. 46,000 articles
D. 4,500 articles
E. 55,000 articles
Answer: B
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Use the rational zeros theorem to determine the potential rational zeros of the polynomial function. Do not find the zeros.f(x) = x5 - 2x2 + 3x + 10
A. ± 1, ± 5, ± 2, ± 10
B. ± 1, ± 5, ± 2
C. ± 1, ± 
, ± 
, ± 
, ± 5, ± 2, ± 10
D. ± 1, ± 
, ± 
, ± 
The line graph shows the recorded hourly temperatures in degrees Fahrenheit at an airport. 
What temperature was recorded at 10 a.m.?
A. 73 ° F B. 75 ° F C. 74 ° F D. 71 ° F
Find the perimeter or area of the figure as indicated. Express your answer in simplified radical form.Find the area of the trapezoid given that its height is 2
m and the lengths of its bases are 
m and 
m.
A. 30 sq m
B. (15 + 5
) sq m
C. (225 + 5
) sq m
D. (15 + 25
) sq m
Solve the problem.Use determinants to find the area of the triangle with vertices (3, 6), (5, 1), and (1, 0).
A. 10.0 B. 10.5 C. 11.0 D. 9.5