Solve the problem.To find the height of this tree, Luis marked the tree at eye level, 1.8 meters above the ground. He measured  from the base of the tree and then held a  ruler vertically in front of his eye until the ruler just obscured the tree above the mark. Using a string tied through a hole in one end of the ruler, Luis found that the distance from his eye to the ruler was 5.1 centimeters. What was the height of the tree? Round to the nearest meter.0.0px;" height="126" width="288" />

A. 30 m
B. 40 m
C. 34 m
D. 36 m

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Answer: D

Mathematics

Express the number in scientific notation.0.0000000307015

A. 3.07015 × 10-8 B. 3.07015 × 10-9 C. 3.07015 × 10-7 D. 3.07015 × 108

Solve the problem.A musician plans to perform 8 selections. In how many ways can she arrange the musical selections?

A. 64 B. 40,320 C. 362,880 D. 8

Determine the domain and range of the relation. State whether the relation is a function or not a function. 

A. domain: {6, 2, 7} range: {5, 14, 4, 13} not a function B. domain: {6, 2, 7} range: {5, 14, 4, 13} function C. domain: {5, 14, 4, 13} range: {6, 2, 7} function D. domain: {5, 14, 4, 13} range: {6, 2, 7} not a function

Find the real solutions of the equation. = 5

A.
B.
C.
D.