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4 years ago

How do scientists know about the ordovician period

Mathematics

2 answers:

REY [17]4 years ago

5 0

Answer:

they do know true the callender

Bond [772]4 years ago

4 0

Answer:

The Ordovician was named by the British geologist Charles Lapworth in 1879. He took the name from an ancient Celtic tribe, the Ordovices, renowned for its resistance to Roman domination. For decades, the epochs and series of the Ordovician each had a type location in Britain, where their characteristic faunas could be found, but in recent years, the stratigraphy of the Ordovician has been completely reworked. Graptolites, extinct planktonic organisms, have been and still are used to correlate Ordovician strata.

Step-by-step explanation:

Hope I Helped! :D

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borishaifa [10]

Answer:

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3 years ago

Which description is correct for the polynomial 2x² + 2?

Blizzard [7]

Answer:

The polynomial is a quadratic binomial

Step-by-step explanation:

we have

$2x^{2}+2$

Classify the polynomial

By the number of terms

we know that

A polynomial with two terms is a binomial

By the Degree of a Polynomial

we know that

The degree of a polynomial is calculated by finding the largest exponent in the polynomial

In the given problem the largest exponent is $2$

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therefore

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6 0

3 years ago

Read 2 more answers

How many cubic blocks of side length of 173 inch would it take to fill a rectangular prism with a length width and height of 3/7

bulgar [2K]

Complete question :

How many cubic blocks of side length of 17 inch would it take to fill a rectangular prism with a length width and height of 3/7 inch 1/7 inch and 3/7 inch

Answer:

9 cubic blocks

Step-by-step explanation:

The volume of a rectangular prism is given as :

V = Length * width * height

V = 3/7 * 1/7 * 3/7 = 9 / 343 in³

The volume of block clube:

Take the cube of the side length :

(1/7)^3 = 1 / 343 in³

Number of cubic blocks required :

Volume of prism / volume of cube

9 / 343 ÷ 1 / 343

9 / 343 * 343 /1 = 9

Hence, 9 cubic cubes are needed to fill the rectangular prism

4 0

3 years ago

Over the entire six years that students attend an Ohio elementary school, they are absent, on average, 28 days due to influenza.

Rina8888 [55]

Answer:

By the Central Limit Theorem, the expected value for the sampling distribution of the number of school days missed due to influenza is 28 days.

Step-by-step explanation:

The Central Limit Theorem estabilishes that, for a normally distributed random variable X, with mean $\mu$ and standard deviation $\sigma$ , the sampling distribution of the sample means with size n can be approximated to a normal distribution with mean $\mu$ and standard deviation $s = \frac{\sigma}{\sqrt{n}}$ .