Solve the problem.A twenty-five foot ladder just reaches the top of a house and forms an angle of 41.5° with the wall of the house. How tall is the house? Round your answer to the nearest 0.1 foot.
A. 18.8 ft
B. 19 ft
C. 18.6 ft
D. 18.7 ft
Answer: D
Mathematics
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Evaluate the derivative at the given value of x.y = 
; x = 100
A. 10
B. 
C. 100
D. 
Mathematics
Evaluate 
Round your result to three decimal places.
a. –1.407 b. 1.407 c. 0.711 d. –0.711
Mathematics
Solve the problem.For the table below, compute the mass of 768 grams of radioactive element D left each day if element D loses 80% of its mass every day. What type of decay is this? 
A. 
; exponential
B. 
; linear
C. 
; linear
D. 
; exponential
Mathematics
To solve this system using a matrix equation, which of the following matrices would be multiplied by the column matrix of the constants to solve for the variables?
?
? ?
A. 
B. 
C. 
D. 
E. 
Mathematics