2 years ago

PLEASE HELP THIS IS SCIENTIFIC NOTATION AND MY TEACHER DOESNT TELL US HOW TO DO IT

Mathematics

1 answer:

kramer2 years ago

6 0

Answer:

1) 6041921252.76

2) 3783786034.9

Step-by-step explanation:

You move the decimal point 9 spaces to the right

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For a sequence an=3/n(n+1) what is the value of a 10

FrozenT [24]

Answer:

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Step-by-step explanation:

Put <em>n = 10</em> to the equation $a_n=\dfrac{3}{n(n+1)}$

$a_{10}=\dfrac{3}{10(10+1)}=\dfrac{3}{10(11)}=\dfrac{3}{110}$

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You and a friend went to the movies. You decide to get some snacks. You got 2 boxes of candy that cost $3.49 for each box. You a

Dima020 [189]

Answer:

You and your friend spent $17.30 together

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3.49 x 2 = 6.98

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2 years ago

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In a flight of 600 km, the speed of the aircraft was slowed down due to bad weather. The average speed of the trip was decreased

UkoKoshka [18]

The average speed would be 600 km/hr.

Step-by-step explanation:

Let the original speed be 'x'

Let the decreased speed be 'x-200'

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Time increased by 30 minutes

According to question, it becomes,

$\dfrac{600}{x-200}-\dfrac{600}{x}=\dfrac{30}{60}\\\\\dfrac{x-(x-200)}{x^2-200x}=\dfrac{1}{2\times 600}\\\\\dfrac{200}{x^2-200x}=\dfrac{1}{1200}\\\\240000=x^2-200x\\\\x^2-200x-240000=0\\\\x=600,-400$

So, The average speed would be 600 km/hr.

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