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TEA [102]
3 years ago
12

Simplify the expression. Write the answer using scientific notation.

Mathematics
1 answer:
Neko [114]3 years ago
8 0
We are given with two distances: 5,880,000,000,000 miles and 15.8 light-years. we convert first the light-years distance through the speed of light : 3 x 108 m/s. v = d/t; d = 3x10 8 m/s * 15.8 light years * 31536000 s = 1.4948 x1017 m = 9.28829 x 1013 miles. The difference thus is 8.70029 x 1013 miles
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Henry has been typing a book report that contains 1250 words. So far he has been typing for 1/4 hour at a rate of 30 words per m
Rasek [7]

He must type the remainder of the report by rate 32 words per minute to finish it in 25 minutes

Step-by-step explanation:

The given is:

  • Henry has been typing a book report that contains 1250 words
  • He has been typing for 1/4 hour at a rate of 30 words per minutes
  • He must type the remainder of the report in 25 more minutes

We need to find his rate to finish the remaining report in 25 minutes

∵ Henry has been typing for 1/4 hour at a rate of 30 words per minute

- We must to change \frac{1}{4} hour to minutes

∵ 1 hour = 60 minutes

∴ \frac{1}{4} hour = \frac{1}{4} hour × 60 = 15 minutes

∴ He has been typing for 15 minutes at a rate of 30 words per minute

∵ The number of words has been typed = his rate × time

∴ The number of words has been typed = 30 × 15 = 450 words

∵ The  book report that contains 1250 words

- Subtract the number of words has been typed from the total

   words to find the remaining word in the book

∴ The remaining words = 1250 - 450 = 800 words

∵ He plans to finish them in 25 minutes

- Substitute the number of the remaining words and the time

   in the rule above to find his rate

∵ 800 = his rate × 25

- Divide both sides by 25

∴ His rate = 32 words per minute

He must type the remainder of the report by rate 32 words per minute to finish it in 25 minutes

Learn more:

You can learn more about the rate in brainly.com/question/10712420

#LearnwithBrainly

6 0
3 years ago
What is the value of |n|=5
nikdorinn [45]

Answer:

n = 5 or -5

Step-by-step explanation:

the absolute value is the count away from 0 so n could be 5 which is 5 units from 0 or -5 which is also 5 units away from 0.

7 0
2 years ago
Read 2 more answers
Which is greater 17% or 4 over 25?
andre [41]
17% is bigger because as a decimal it is 0,17 whereas 4/25 as a decimal is 0.16. Hope this helps
4 0
3 years ago
...............................
prisoha [69]

Answer:

804.2

Step-by-step explanation:

Formula
\pi r^{2}

plug in

\pi *16^{2}

≈ 804.24772

round to nearest tenth

≈ 804.2

7 0
1 year ago
Solve for y: - √(y) = -5
Serggg [28]
-sqrt(y) = -5

Multiply each side by (-) negative sign: sqrt(y) = 5

Square each side: y = 25

Answer: (C) 25

 


3 0
3 years ago
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