Calculate the area of the surface S.S is the portion of the cylinder x2 + y2 = 16 that lies between z = 4 and z = 5.
A. 8?
B. 4?
C. 36?
D. 72?
Answer: A
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Multiply in the indicated base.14five × 21five
A. 323five B. 444five C. 343five D. 344five
Solve using Cramer's rule, if possible. If it is not possible, state whether the system is inconsistent or has infinitely many solutions.
A. (6, 1, 6) B. (5, -6, -1) C. (6, 4, 1) D. (5, 6, 1)
Multiply. 
? 
A. 
B. 
C. 
D. 
Suppose a 6-ft person wishes to determine the height of a bridge above the bottom of a canyon, as shown in the figure below. To do this, this person stands at one end of the bridge (point A) and looks down to a point directly below the other end (point B). With the help of a companion, point P is determined to form two triangles. Find the distance to the bottom of the canyon, if src="https://sciemce.com/media/3/ppg__cognero__7.4_Similar_Triangles__media__85d99f41-c3ea-40e6-8644-705ece164be5.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_8b5f27d438c3497ea9c20704d" /> ft.
?
ft and 
?
A. 30 ft
B. 8 ft
C. 5 ft
D. 6 ft
E. 40 ft