Use a calculator to give the real number value. Round the answer to 7 decimal places.y = cos-1(0.8910)
A. 0.4712533
B. 0.5063492
C. 1.1000010
D. 0.4365083
Answer: A
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Find the vertices and foci of the ellipse.
+ 
= 1
A. Vertices: (0, ±15); Foci: (0, ±9) B. Vertices: (±15, 0); Foci: ( ±9, 0) C. Vertices: (0, ±15); Foci: (0, ±12) D. Vertices: (±9, 0); Foci: ( ±12, 0)
Solve the problem.Hye-Ran, who is 1.98 m tall, wishes to find the height of a tree. She walks 23.98 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 7.38 m from the end of the shadows. How tall is the tree? Round to the nearest hundredth.
A. 2.86 m B. 8.41 m C. 0.61 m D. 6.43 m
For the given polynomial P(x) and the given c, use the remainder theorem to find P(c).P(x) = x2 + 14x + 41; -9
A. 4 B. 5 C. 0 D. -4
Solve the problem.A surveyor standing 53 meters from the base of a building measures the angle to the top of the building and finds it to be 37°. The surveyor then measures the angle to the top of the radio tower on the building and finds that it is 47°. How tall is the radio tower?
A. 16.9 m B. 6.18 m C. 6.87 m D. 9.35 m