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Alika [10]
2 years ago
7

The amounts of food waste generated in a region during two years were 37,500,000 tons and 30,400,000 tons. What was the total fo

od waste generated over these two years in the region, expressed in scientific notation?
A. 67.9 ⋅ 1014 tons
B. 6.79 ⋅ 107 tons
C. 67.9 ⋅ 107 tons
D. 6.79 ⋅ 1014 tons
Mathematics
1 answer:
alex41 [277]2 years ago
3 0

Answer:

6.79 ⋅ 107

Step-by-step explanation:

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Can someone explain HOW to simplify this algebraic fraction, as in tell me why and what I need to do for each step : 1-n/n^2-1
Andreyy89

- I’m assuming the expression implies the following:

(1-n)/(n^2 - 1)

The steps goes as follows:

= -(n-1)/(n^2-1) (factored a negative out)
= -(n-1)/[(n+1)(n-1)] (Factored denominator into a difference of squares, but don’t just blindly accept the fact, expand it and you should get the original denominator)

At this point, the (n-1) terms cancel, as you should know: a real number, besides 0, over itself is 1.

= -1/(n+1) , which is the answer

Note: You could also see it as 1/-(n+1) or 1/(-n-1)
8 0
2 years ago
A video game company is designing a game based on professional race cars. Professional race cars have a length of 570 cm and a w
siniylev [52]

Answer:

  A) 1/45

  B) 1/60

Step-by-step explanation:

<u>Part A</u>

The actual car has a length to width ratio of ...

  length/width = (570 cm)/(180 cm) = 57/18 = 3 1/6

The rectangle on the screen has a length to width ratio of ...

  length/width = (13 cm)/(4 cm) = 3 1/4

Relative to its width, the screen rectangle is longer than necessary for a model of the car. So, the scale factor will be determined by the width of the car relative to the width of the screen model.

For a model width of 4 cm, the scale factor is ...

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__

<u>Part B</u>

For a model width of 3 cm, the scale factor is ...

  model/life-size = (3 cm)/(180 cm) = 1/60

7 0
2 years ago
1. What are the opposite and absolute value of: a) 7.2 ____,____ b) -3.5 ____, ____ c) 5 ½ ____,____
NARA [144]

Opposite value would be either changing from a positive to a negative or from a negative to a positive.

Absolute value is always a positive value

A) 7.2, -7.2, 7.2

B) -3.5, 3.5, 3.5

C) 5 1/2, -5 1/2, 5 1/2

7 0
3 years ago
Read 2 more answers
PLEASE HELP ME IM HONESTY SO CONFUSED WITH THE ANSWERS GIVEN
Drupady [299]

Answer:

C. The sum of 18 and half the product of 9 and 4.

8 0
1 year ago
Max has just won some money on a game show! He has the option to take a lump sum payment of $500,000 now or get paid an annuity
Fofino [41]

Answer:

The second option annually

Step-by-step explanation:

(4,900×12)×10 the multiply by 2.9%. Take that number and add on every 10 years

3 0
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