The planet Mars is approximately 6800km in diameter. Through a reflecting telescope its image appears as circle 1.7m in diameter. What is the scale factor of this reduction? Select one:

a.
0.000 000 25
b.
0.4
c.
0.000 4
d.
0.000 25
e.
0.000 000 4

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Find a third-degree polynomial equation with rational coefficients that has roots -2 and 6+i

Andy wants to find the distance d across a river. he located points as shown in the figure, then use similar triangles to find that d = 223.5 feet. how can you tell without calculating that he must be wrong? tell what you think he did wrong and correct his error. round your answer to the nearest tenth if necessary. andy must have used the wrong . the distance d is actually feet.