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MatroZZZ [7]
3 years ago
10

PLEASE SOVEL THIS I WILL GIVE OUT 20 POINT

Mathematics
1 answer:
Anettt [7]3 years ago
5 0

9514 1404 393

Answer:

  21.25 seconds

Step-by-step explanation:

In miles per second, the speed of the jet is ...

  (720 mi/h)/(3600 s/h) = 1/5 mi/s

The speed of the sound is the same:

  (1 mi)/(5 s) = 1/5 mi/s

Then the rate of closure between the airplane and the sound is ...

  (1/5 mi/s) +(1/5 mi/s) = 2/5 mi/s

To find the time required to close a gap of 8 1/2 miles, we can use the relation ...

  time = distance/speed

  time = (8.5 mi)/(0.4 mi/s) = 21.25 s

The pilot will hear the thunder 21.25 seconds after the flash.

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30 Points! please help!
SVEN [57.7K]

Answer:

18) 4 * 10 ^ -10

19) t ^ 9

Step-by-step explanation:

18. When multiplying in scientific notation, just multiply the regular numbers together and add the exponents for the tens.

So it'll be 40 * 10^-11

However, the beginning number should have the decimal right after the 4, not any place after (for example, it's 3.056, not 30.56 or 3056.)

To fix this, move the decimal place forward one space from 40. to 4.0, and add 1 to the -11 power.

So the answer is now 4 * 10^-10

19. When dividing exponents, if the base number is the same, you can divide. (Basically, you can not divide x^2 and y^3 because x and y aren't the same)

Since in this case it's t, you can divide.

Dividing exponents is simple: just subtract them.

14 - 5 = 9

so the answer is t ^ 9

3 0
3 years ago
G(x) = 2x^2 and h(x) = .What is (g h)-1 and is it a function?
Andrews [41]
H(x) equals what? I think you've missed that detail. :)
3 0
3 years ago
Read 2 more answers
2 For each figure, are 21 and 22 adjacent angles or vertical angles? Explain.<br> b.<br> a.<br> 2
kupik [55]

Answer:

a is vertical and b is adjacent angles

3 0
2 years ago
One leg of a triangle has a measure of 24 units if the hypotenuse measures 25 units what is the lengh of the other leg
marusya05 [52]
If we assume this is a right triangle

 for a right triangle
if it has legs length a and b and hyptonouse c then
a²+b²=c²

given
a leg is 24
hyptonuse =25
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576+b²=625
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the other leg is 7 units
5 0
3 years ago
A bicycle has a listed price of 
Yakvenalex [24]

Answer: 57.9 dollar

891.95 x 6.5%

4 0
3 years ago
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