Solve the problem.Mieko, who is 1.55 m tall, wishes to find the height of a tree. She walks 19.83 m from the base of the tree along the shadow of the tree until her head is in a position where the tip of her shadow exactly overlaps the end of the tree top's shadow. She is now 6.26 m from the end of the shadows. How tall is the tree? Round to the nearest hundredth.
A. 2.27 m
B. 0.49 m
C. 4.91 m
D. 6.46 m
Answer: D
Mathematics
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Solve.
+ 
= -1
A. 5
B. 0
C. - 
D. No solution
Mathematics
Write a description of the shaded region using the symbols A, B, C, ?, ?, -, and ' as needed.
A. C ? B' ? A B. A ? C C. B' ? A ? C D. A ? C - B
Mathematics
Perform the indicated operation. Express the answer in scientific notation.
A. 2.0 × 103 B. -1.5 C. 2.5 × 104 D. 5.0 × 10-9
Mathematics
Let z vary jointly with x and y. Find the constant of variation k. Then, use 
to find z when x = 5 and y = 7.z = 56 when x = 
and y = 7
A. k = 15; z = 490 B. k = 48; z = 1680 C. k = 56; z = 1960 D. k = 14; z = 525
Mathematics