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The function f(x) = 15(1.4)^x represents the area in square inches of a photograph after it has been enlarged x times by a factor of 140%. What is the area of the photograph after it has been enlarged 4 times?
A. 5.6 square inches
B. 57.624 square inches
C. 41.16 square inches
D. 560 square inches

Respuesta :

mathecoach

Answer:

f(4) = 15 * 1.4^4 = 57.624 inches²


zrh2sfo

Answer:

57.624 in²

Step-by-step explanation:

f(4) = 15(1.4)^4

= 15 (14/10)^4

= 15 (7/5)^4

= 15 (2401/625)

= 7203/125 = 57.624 in²

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