3 years ago

Out of 1,100 discs tested, 13 are defective. Estimate the number of defective discs in a batch of 41,000.

1 answer:

8 0

13/1,100 = x/ 41,000 (in English, this reads 13 out of 1,100 equals x out of 41,000) * by 41,000 and you get 41,000 x 13/1,100 = x
which is about 485

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Find the 4th term if the sequend in which a1 = 2 and a n+1 = -4a n + 2.

Gre4nikov [31]

The given sequence is
$a_{1}=2 \\
a_{n+1}=-4a_{n}+2$

Write the first 4 terms.
When n=1, obtain
a₁ = 2
When n=2, obtain
a₂ = -4a₁ + 2
= -4(2) + 2 = -8 + 2
= -6
When n=3, obtain
a₃ = -4a₂ + 2
= -4(-6) + 2 = 24 + 2
= 26
When n=4, obtain
a₄ = -4a₃ + 2
= -4(26) + 2 = -104 + 2
= -102

Answer: a₄ = -102

3 0

4 years ago

Koda is solving 13 × 16. He used an area model to help work through each step. Which calculation did Koda make to get the highli

Anastasy [175]

Step-by-step explanation:

Since we have given that

Koda is solving

$13\times 16$