The area of a telescope lens is 6.676 x 10 mm. (a) what is the area in square feet (ft)? enter your answer in scientific notation. x 10ft (b) if it takes a technician 51.7 s to polish 1.46 x 10mm', how long does it take her to polish the entire lens?

a) A = 7.186 E-4 ft²

b) t = 236.403 s

Explanation:

A = 6.676 E1 mm²

a) A = 6.676 E1 mm² * ( ft / 304.8 mm )²

⇒ A = 7.186 E-4 ft²

b) t = 51.7 s → A = 1.46 E1 mm²

⇒ relation (r) = 6.676 E1 mm² / 1.46 E1 mm² = 4.573

⇒ t = 51.7 s * 4.573 = 236.403 s

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