A welder has four pieces of scrap steel angle of lengths 
ft, 
ft, 
style="vertical-align:-9px;" varid="variable_id_field" variablename="impvar_959d086398da4420b710dc333" class="wirisformula" /> ft and 
ft. If they are welded together, how long is the welded piece?
A. 
ft
B. 
ft
C. 
ft
D. 
ft
E. 
ft
Answer: C
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If a skydiver jumps from an airplane, his velocity v, in feet per second, starts at 0 and increases toward a terminal velocity of 
feet per second. The difference 
is an exponential function of time.
? A: What is the initial value of D? ? B: For each second that passes, D decreases by 17%. What is the one-second decay factor for D? Round your answer to two decimal places if necessary. ? C: Find an exponential formula for D. Use t for the number of seconds since the skydiver jumped. ? D: Find a formula for v. ? What will be an ideal response?
Write the decimal as a fraction or mixed number in lowest terms.0.62
A. 
B. 
C. 
D. 
Write the equation of the ellipse that has its center at the origin, focus at 
, and major axis equal to 18.
?
A. 
B. 
C. 
D. 
E. 
Find the perimeter of the figure.
A. 100 m B. 95 m C. 113 m D. 84 m