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3 years ago

86400 in scientific notation

2 answers:

8 0

8.64 x 10^4
You have to change it to be a number between 1 and 10. When you move the decimal to the left its a positive exponent and when you move it to the right it's a negative exponent.

KIM [24]3 years ago

5 0

It would be 8.64 x 10⁴
You have to get the number in units place and adjust the decimals accordingly.

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3 years ago

A parallelogram has one angle that measures 120 degrees. What are the measures of other three angles in the parallelogram?

leonid [27]

Answer:

60 degrees

Step-by-step explanation:

First we need to know how many degrees are in a parallelogram. We can use the formula 180(n-2) (n is the number of sides)

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Now we can set up the following equation as:

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Therefore we know 2 angles are each 120 degrees and the other 2 are 60 degrees.

Makes sense?

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4 years ago

The population density of Themville is 17.5 Thems per acre. Exactly 840 Thems live in Themville. How many acres is Themville?

Usimov [2.4K]

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4 years ago

2a. According to a Pew Research survey, about 25% of American adults are pessimistic about the future of marriage and the family

drek231 [11]

Answer: 0.4181807

Step-by-step explanation:

Probability that American adults are pessimistic about the future of marriage and the family: p= 0.25

Sample size n= 20

Let $\hat{p}$ be the sample proportion of American adults that are pessimistic about the future of marriage and the family.

$P(\hat{p}\leq0.23)=P(\dfrac{\hat{p}-p}{\sqrt{\dfrac{p(1-p)}{n}}}$

Hence, the required probability = 0.4181807

8 0

3 years ago