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denis-greek
3 months ago
13

Find the truth set of each predicate. (If your answer is an interval, enter it using interval notation; otherwise enter it as a

comma-separated list.) (a) Predicate: 10 d is an integer, domain: ℤ Correct: Your answer is correct. (b) Predicate: 10 d is an integer, domain: ℤ+ Correct: Your answer is correct. (c) Predicate: 1 ≤ x2 ≤ 4 , domain: ℝ (d) Predicate: 1 ≤ x2 ≤ 4 , domain: ℤ Correct: Your answer is correct.
Mathematics
1 answer:
Zina [12.3K]3 months ago
6 0

(a) Predicate: 10d is an integer

Considering the domain is \mathbb{Z}. Integers are closed under multiplication, and since 10 is an integer, if d is also an integer, then multiplying it by 10 results in an integer as well.

(c) 1\leq x^2\leq 4

With both 1 and 4 being perfect squares, we find:

1\leq x^2 \leq 4 \iff 1^2\leq x^2 \leq 2^2

Thus, x needs to lie between 1 and 2. Additionally, since squaring negative numbers yields positive results, the range including numbers from -2 to -1 is acceptable as well. Hence, the domain is

[-2,-1]\cup [1,2]

Predicates (b) and (d) are equivalent to (a) and (c)

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Response: 100/400

Detailed explanation:

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3 months ago
The line width of a tool used for semiconductor manufacturing is assumed to be normally distributed with a mean of 0.5 micromete
zzz [12365]

Answer:

a. 0.82%

b. 71.11%

c. 0.564 micrometer

Step-by-step explanation:

To find the z value for each measurement, we must calculate and determine the percentage they correspond to, and the difference will give us the percentage between those two statistics.

The equation for z is:

z = (x - m) / (sd)

Here, x is the value being evaluated, m denotes the mean, and sd represents the standard deviation.

a.

For 0.62 copies, we calculate:

z = (0.62 - 0.5) / (0.05)

z = 2.4

This translates to 0.9918.

Therefore, p (x > 0.62) = 1 - 0.9918

p (x > 0.62) =  0.0082 = 0.82%

b.

For 0.47 copies, we have:

z = (0.47 - 0.5) / (0.05)

z = -0.6, which equates to 0.2742.

For 0.63 copies:

z = (0.63 - 0.5) / (0.05)

z = -2.6, which yields 0.9953.

Hence, p (0.47 > x > 0.63) = 0.9953 - 0.2742

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c.

For x copies, we find:

p = 0.9 corresponds to z = 1.28.

Thus, 1.28 = (x - 0.5) / (0.05)

From which we derive:

x = 1.28*0.05 + 0.5

x = 0.564 micrometer

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9. Apply The number of people in the United States who are at least 100
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2 months ago
For each store what is the ratio of the number of cans to the price? Super saver 12 pack 4 for $10, shop smart 24 pack 2 for $9,
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At Super Saver, 4 packs are priced at $10, which gives us 12 × 4 = 48 cans for ratio calculation. The ratio translates to 48 cans for $10, or 4.8 cans per dollar. For Shop Smart, similarly, 24 × 2 results in 48 cans priced at $9, creating a ratio of 48 cans for $9, or 5 1/3 cans per dollar. At Price Busters, 12 × 3 results in 36 cans for $9, translating to a cost of 3 cans per dollar. Overall, Shop Smart offers the best value per can, followed by Super Saver, and lastly Price Busters.

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