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arlik [135]
3 years ago
11

It's generally known that it takes 8 minutes for light to get from the Sun to the Earth. If the speed of light is 3.0 X 10^8 m/s

and the distance from the Sun to the Earth is 9.3 X 10^7 miles, is this a true statement?
Mathematics
1 answer:
harina [27]3 years ago
6 0

Answer:

  yes

Step-by-step explanation:

The time required at the given speed and distance is ...

  time = distance/speed

  time = (9.3×10^7 mi)(1.6×10^3 m/mi)/(3.0×10^8 m/s) ≈ 4.96×10^2 s

This time corresponds to 8 minutes and 16 seconds. To an accuracy of 1 significant digit, the statement is true.

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What is the value of y<br><br> 4y squared-7y=15
zvonat [6]

Answer:

y= 3, (-5/4)

Step-by-step explanation:

4y^2-7y=15

4y^2 - 7y -15

(y-3)(4y+5)

8 0
3 years ago
exercise alone. Two methods of collecting data have been proposed. Method I: Recruit volunteers who are willing to participate.
aniked [119]

Answer:

I) If method I is used, population of generalization will include all those people who may have varying exercising habits or routines.  They may or may not have a regular excersing habit.  In his case sample is taken from a more diverse population

II) Population of generalization will include people who will have similar excersing routines and habits if method II is used since sample is choosen from a specific population

Step-by-step explanation:

past excercising habits may affect the change in intensity to a targeted excersise in different manner. So in method I a greater diversity is included and result of excersing with or without a trainer will account for greater number of variables than method II.

5 0
3 years ago
Jayden measured a community college and made a scale drawing. He used the scale 22 millimeters : 9 meters. The actual length of
juin [17]

Hey there! :)

Answer:

x = 242 mm.

Step-by-step explanation:

Begin by setting up a proportion between the actual college building and the drawing.

\frac{22mm}{9m} = \frac{x}{99m}

Cross multiply:

99 × 22 = 9 × x

2178 = 9x

Divide both sides by 9:

2178/9 = 9x/9

x = 242 mm.

5 0
4 years ago
Adam sleeps for nine hours each night, five nights a week, and 11 hours for two nights a week.
melisa1 [442]

Answer:

E

Step-by-step explanation:

3 0
3 years ago
What is the product? 2x+8 x2 + 3x-4 x(x-4)(x-1) 20x+4) 2 (x+4)(x-4) 2x(x-1) 2x(x+4)​
guajiro [1.7K]

=−640x10+1280x9+19904x8−40728x7−144488x6+323904x5−162304x4+1024x3+2048x2

step by step

(2x+8x2+3x−4x(x−4)(x−1)(20)x+4)(2)(x+4)(x−4)(2)x(x−1)(2)x(x+4)

=((2x+8x2+3x−4x(x−4)(x−1)(20)x+4)(2)(x+4)(x−4)(2)x(x−1)(2)x)(x+4)

=((2x+8x2+3x−4x(x−4)(x−1)(20)x+4)(2)(x+4)(x−4)(2)x(x−1)(2)x)(x)+((2x+8x2+3x−4x(x−4)(x−1)(20)x+4)(2)(x+4)(x−4)(2)x(x−1)(2)x)(4)

=−640x10+3840x9+4544x8−58904x7+91128x6−40608x5+128x4+512x3−2560x9+15360x8+18176x7−235616x6+364512x5−162432x4+512x3+2048x2

=−640x10+1280x9+19904x8−40728x7−144488x6+323904x5−162304x4+1024x3+2048x2

7 0
3 years ago
Read 2 more answers
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