Find the number that belongs in the green box. round your answer to the nearest tenth.

16.7°

Step-by-step explanation:

We solve this using the Cosine rule formula

From the question we have

Side a = 14

Side b = 15

Side c = ?

We are given Angle C = 70°

Hence,

c² = a² + b²− 2ab cos(C)

Hence,

c² = 14² + 15² - 2(14 × 15) × cos (70°)

c =√[ 14² + 15² - 420 × cos (120°)]

c = 16.65387 °

Approximately to the nearest tenth

c = 16.7°

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step-by-step explanation:

f(x) has value 150 at x= 0

and 0 at x= 3

so d(f(x))/dt = slope = -150/3 = -50