3 years ago

The answer to number 3

Mathematics

1 answer:

Reptile [31]3 years ago

6 0

Answer:

4.5×10^17 m²

Step-by-step explanation:

The radius is half the diameter, so we can make the substitution r=d/2 into the formula to get ...

A = 4πr² = 4π(d/2)² = πd²

Filling in the given values and doing the arithmetic gives ...

A = 3.14×(3.8×10^8 m)² = 45.3416×10^16 m²

A ≈ 4.5×10^17 m²

We round to 2 significant digits because that is the precision of the given diameter.

You might be interested in

An oil spill spreads 25 square meters every 1/6 hour. How much area does the oil spill cover after 2 hours

Varvara68 [4.7K]

It will 300 in two hours at that rate

4 0

3 years ago

When a researcher asks respondents for the names or identities of others like themselves who might qualify to take part in the s

DanielleElmas [232]

Answer:

Chain referral sampling

Step-by-step explanation:

Chain referral sampling is also known as snowball sampling. In this form of sampling, the samples are collected from the referrals given by the existing samples. The samples are collected and the research is conducted respectively. This method is used in the business marketing also. The places where the people are not known by the company, the method of chain referrals are made and the samples are collected.

5 0

2 years ago

Please help me Simplify 3✔️2 - ✔️2

MAXImum [283]

$\bf \stackrel{like~terms}{3\sqrt{2}-\sqrt{2}}\implies 2\sqrt{2}$