Use a proportion to solve the problem. Round to the nearest tenth as needed.Find the height of the building. Assume that the height of the person is 
A. 36.4 ft
B. 473.2 ft
C. 98 ft
D. 70 ft
Answer: D
Mathematics
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Find d2y/dx2 without eliminating the parameter.x = ln(9t), y = e9t, t > 0
A. 9e9t + 81te9t B. -81t2e9t C. 9te9t + 81t2e9t D. te9t + 9t2e9t
Mathematics
Divide and simplify.
÷ 
A. 
B. x + 3
C. 
D. 
Mathematics
Provide an appropriate response.Determine the measure of the acute angle ? for which cos ? = 
.
A. 45° 
B. 60° 
C. 30° 
D. 90° 
Mathematics
Simplify the expression. Leave answers with exponents.(7t)2
A. 72t2 B. 7t2 C. 14t2 D. 72t
Mathematics