Find an equation of the ellipse.An ellipse with center at origin, length of major axis 10 and y-intercepts 
A. 
+ 
= 1
B. 
+ 
= 1
C. 
+ 
= 1
D. 
+ 
= 1
Answer: D
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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__7eca80cb-8127-4e00-b31e-161c7e376f1e.PNG" class="wirisformula" align="middle" style="vertical-align: middle;" data-wiris-created="true" varid="variable_id_field" variablename="impvar_d2b47a8f0436403b87fbec914" /> ft.
?
ft and 
?
__________ ft
Fill in the blank(s) with the appropriate word(s).
Use dimensional analysis to answer the question. If you are driving 46 mph in a 70-kph speed zone, are you driving over the speed limit, exactly at the speed limit, or below the speed limit?
A. Under the speed limit B. Over the speed limit C. Exactly at the speed limit
Use the indicated property to provide a new expression equal to the given expression. 3 + x; commutative law for addition
A. -x - 3 B. x - 3 C. 3 - x D. x + 3
Write the decimal as a percent.0.15
A. 0.015% B. 15% C. 1.5% D. 150%