3 years ago

0.0000000006 in scientific notation???

2 answers:

4 0

When the number is smaller than 1, the decimal point has to move to the right, so the power of 10 is negative.
Answer: 6 x 10^-10

givi [52]3 years ago

3 0

6 × 10^-10

Hope this helps

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Eight less than the product of a number n and<br> is no more than 94.

vladimir2022 [97]

First, let's call "a number": n

Then. "eight less than a number" can be written as: n-8

This expression "is no more than 14" can be written as: n−8≤14

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3 years ago

All numbers less than or equal to 22

alekssr [168]

Answer:

x ≤ 22

Step-by-step explanation:

≤ means less than or equal to

≥ means greater than or equal to

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Jacob’s class had 8 boys and 10 girls. Olivia’s class has 9 boys and 15 girls. Which class has the smaller ratio of boy/girls?

bonufazy [111]

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Step-by-step explanation:

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Justin recently drove to visit his parents who live 96 miles away. On his way there his average speed was 20 miles per hour fast

never [62]

Answer:

Justin's average speed to his parents' house: x= 40mph

Justin's average speed from his parents' house: x+20=60 mph

Step-by-step explanation:

Let the average speed be x +20

Then average speed from his parents' x

And the distance is S=96

Then we know :

$\displaystyle \frac{S}{x+20} +\frac{S}{x} =4 \\\\\\ \frac{96}{x+20} +\frac{96}{x}=4 \ |\div 4 \\\\\\ 24\bigg(\frac{1}{x+20} +\frac{1}{x} \bigg) =1 \\\\\\ 24\cdot \frac{x+x+20}{(x+20)x} =1 \ |\cdot (x+20)x \ \ \\\\\\48x+480=x^2+20x \\\\ x^2-28x-480=0 \\\\ \rm D=28^2+4\cdot 480=2704 =52^2 \\\\ \boxed{x_1=\frac{28+52}{2} =40} \\\\x_2=\frac{28-52}{2} =-12 \ \ \varnothing$

Justin's average speed to his parents' house: x= 40mph

Justin's average speed from his parents' house: x+20=60 mph

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3 years ago

A circle has a diameter of 8 m. What is the approximate area of the circle? 200.96 m2 12.56 m2 25.12 m2 50.24 m2

Nataly_w [17]

Answer:

50.24

Step-by-step explanation:

area of a circle =pi r^2

diameter = 2 * radius

radius=8/2=4

area=pi 4^2

=pi 16

=50.26

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3 years ago

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