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BARSIC [14]
2 years ago
12

Simplify the expression and write your answer in scientific notation: (2.6 X 105)2

Mathematics
1 answer:
Marizza181 [45]2 years ago
7 0

Step-by-step explanation:

(2.6 X 10⁵)²

=6.76×10¹⁰

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In a certain city of several million people, 7.7% of the adults are unemployed. If a random sample of 300 adults in this city is
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Answer: 0.2643

Step-by-step explanation:

Given : The proportion of  adults are unemployed : p=0.077

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By suing normal approximation to the binomial , we have

\mu=np=300\times0.077=23.1

\sigma=\sqrt{np(1-p)}=\sqrt{300\times0.077(1-0.077)}\\\\=4.61749932323\approx4.62

Now, using formula z=\dfrac{x-\mu}{\sigma}, the z-value corresponding to 26 will be :-

z=\dfrac{26-23.1}{4.62}\approx0.63

Using standard distribution table for z , we have

P-value=P(z\geq0.63)=1-P(z

=1-0.7356527=0.2643473\approx0.2643

Hence, the probability that at least 26 in the sample are unemployed  =0.2643

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2 years ago
Which of the triangles shown are scalene triangles?
sergij07 [2.7K]

The triangle that shows a scalene triangle is: D. a triangle where all the sides on it are different lengths.

<h3>What is a Scalene Triangle?</h3>

A scalene triangle is a triangle whose three angles are unequal and also has three unequal sides.

This means that any two sides or two angles of a scalene triangle must not be equal.

Thus, the triangle that shows a scalene triangle is: D. a triangle where all the sides on it are different lengths.

Learn more about scalene triangle on:

brainly.com/question/16589630

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1 year ago
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