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pickupchik [31]
3 years ago
15

What times what gives you 1800

Mathematics
1 answer:
kiruha [24]3 years ago
7 0

Answer:

900 x 2

Step-by-step explanation:

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Problem: According www.textrequest, an American between 18-24 sends and receives about 128 text messages per day. Assume that th
borishaifa [10]

Answer:

(130.08, 139.92)

Step-by-step explanation:

Given that:

Mean (m) = 135

Standard deviation (σ) = 30

Sample size (n) = 100

α = 90%

The confidence interval value is obtained using the relation:

Mean ± Zcritical * (standard deviation / sqrt(n))

Zcritical at 90% = 1.64

standard deviation / sqrt(n) = 30 / sqrt(100)

= 30 / 10 = 3

Hence,

135 ± 1.64 * (3)

Lower limit : 135 - (1.64 * 3) = 130.08

Upper limit : 135 + (1.64 * 3) = 139.92

Hence,

Confidence interval = (130.08, 139.92)

8 0
3 years ago
Lucas and William are playing a video game and they have scored a total of 20,000 points. Lucas scored 1000 more than Williams.
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Answer:

Hey there!

The system can be written as

l+w=20000

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Let me know if this helps :)

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3 years ago
Select the perfect square trinomial from among the options below.
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