Round your answer to four decimal places if necessary.
Approximate the area under the curve on the given interval using \( n \) rectangles and the evaluation rules for the left endpoint.
\( y = 7 \cos ( x ) \) on \( [ 0 , \pi / 2 ] , n = 64 \)
Area under the curve
7
Jason places a mirror on the ground \( 40 \) feet from the base of a tree. He walks backward until he can see the top of the tree in the middle of the mirror. At that point, Jason's eyes are \( 6 \) feet above the ground and he is \( 8 \) feet from the image in the mirror. Wha] is the height of the tree? A. \( 30 \) feet B. \( 32 \) feet C. \( 53 \) feet D. \( 46 \) feet
A. \( 30 \) feet
B. \( 32 \) feet
C. \( 53 \) feet
D. \( 46 \) feet
A \( 10 \) foot ladder is leaning against a building. The ladder makes a \( 45 \) degree angle with the building. How far up the building does the ladder reach?
A. \( 5 \sqrt { 2 } \) feet
B. \( 20 \sqrt { 2 } \) feet
C. \( 10 \sqrt { 2 } \) feet
D. \( 5 \) feet
