The nth term of a sequence is given. Calculate the fifth partial sum.an = 
A. 
B. 
C. 
D. 
Answer: C
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Solve.The sides of a triangle are 870 ft, 455 ft, and 855 ft. Find its perimeter.
A. 2,650 ft B. 4,360 ft C. 2,180 ft D. 1,725 ft
Answer the question(s) based on the following situation: Over the last 80 years records have been kept of the annual rainfall in the Tasmanian desert. The distribution of annual rainfall is approximately normal and has no outliers. The minimum of 2.5 inches of rain occurred in 1959; the maximum of 9.7 inches of rain occurred in 1938.What is the approximate average annual rainfall over the last 80 years?
A. 4.3 inches B. 5.2 inches C. 3.2 inches D. 6.1 inches E. none of these
Find an equation for the hyperbola described. Graph the equation.Center at (0, 0); vertex at (0, 3); focus at (0, -
)
A. 
- 
= 1
B. 
- 
= 1
C. 
- 
= 1
D. 
- 
= 1
Write the complex number in polar form. Express the argument ? in degrees, with 0 ? ? ? 360°.-
- i
A. 
(cos 225° + i sin 225°)
B. 
(cos 45° + i sin 45°)
C. 
(cos 135° + i sin 135°)
D. 
(cos 315° + i sin 315°)