3 years ago

Round your answer to the nearest hundredth.

1 answer:

5 0

Answer:

$cos(a) = \frac{ac}{ab} \\ cos \: 40° = \frac{x}{4} \\ x = 4 \cos40° \\ x = 3.0641 \\ \\ approimatly \\ x = 3.06$

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timama [110]

Answer:

480

Step-by-step explanation:

Sn = n÷2 × (2a + (n-1)d)

n = 20 a = -14 d = 4

S20 = 10 × (-28 + 19 × 4) = 480

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olga_2 [115]

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