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JulijaS [17]
3 years ago
7

Can someone actually help me w this ?

Mathematics
1 answer:
Kay [80]3 years ago
8 0

Answer:

the first 1

Step-by-step explanation:

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A rectangle prism has edge lengths of 3.5 inches 2.5 inches and 1.5 inches how many cubes with side lengths of 0.5 inches would
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A company manufactures 2,000 units of its flagship product in a day. The quality control department takes a random sample of 40
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Answer:

B

Step-by-step explanation:

The recommended sample size n for point estimates is:

n = NX / (N + X - 1)

where N is the population size, and X is defined as:

X = Z² p (1 - p) / E²

where Z is the critical value, p is the sample proportion, and E is the margin of error.

Assume a confidence level of level of 95% and a margin of error of 5%.

α = 0.05, Z(α/2) = 1.96

E = 0.05

Of the 40 units tested, 2 had lifespans less than 26 days.  So the proportion is:

p = 2/40 = 0.05

Therefore:

X = (1.96)² (0.05) (1 - 0.05) / (0.05)²

X = 73

Given N = 2000:

n = (2000) (73) / (2000 + 73 - 1)

n = 70.45

Rounding, the recommended sample size is 70.

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3 years ago
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Find the common ratio and an explicit form in each of the following geometric sequences.
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Answer:

The explicit form is a_{n}=162(2/3)^{n-1}

Step-by-step explanation:

The explicit form of a geometric sequence is given by:

a_{n}=ar^{n-1}

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72/108=2/3

Therefore:

r=2/3

Replacing a and r in the formula:

a_{n}=162(2/3)^{n-1}

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