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Yuki888 [10]
3 years ago
5

What is the perimeter of the track in meters use TT= 3.14 and round to the nearest hundredth of a meter

Mathematics
1 answer:
Sonja [21]3 years ago
5 0

Answer:

P = 321.3m

Step-by-step explanation:

To help simplify the process of solving this problem, first break it up into different shapes. Here, you have two shapes: a rectangle and a circle (1 semi-circle + 1 semi-circle = 1 circle).

Next, use the equation for circumference of a circle to find the first part of the perimeter (C = πd). In this case, the diameter would be 45m.

  1. C = πd
  2. C = 3.14 × 45
  1. C = 141.3 m

This is the first part of the circumference. Now, you must consider the rectangle. (Because the two shorter sides of the rectangle are not part of the perimeter, do not include these in your final answer.) The length of the rectangle is 90 meters, and since both sides that measure to 90m are part of what makes up the perimeter, lastly add these to the circumference you calculated earlier.

  1. (90 + 90) or (90 × 2) = 180
  2. P = 141.3 + 180
  3. P = 321.3m

Hope this helps! : )

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N = 2424 is the sample size (amount of cars being sampled)
df = degrees of freedom
df = n-1
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Side Note: if there is a typo and the sample size should be n = 24 (instead of 2424), then the df would be df = n-1=24-1 = 23
5 0
3 years ago
TechWiz Electronics makes a profit of $35 for each MP3 player sold and $18 for each DVD player sold. Last week, TechWiz sold a c
Svetllana [295]

Let x be the number of MP3 players TechWiz sold last week.

If TechWiz sold in total 130 MP3 and DVD players, then it sold (130-x) DVD players.

1. TechWiz Electronics makes a profit of $35 for each MP3 player sold, then it makes a profit $35x for x MP3 players sold.

2. TechWiz Electronics makes a profit of  $18 for each DVD player sold , then it makes a profit $18(130-x) for (130-x) DVD players sold.

3. An expression for the combined total profit (in dollars) TechWiz made from MP3 and DVD players last week is

35x+18(130-x).

You can simplify it:

35x+2,340-18x=17x+2,340

Answer: 35x+18(130-x) or 17x+2,340

8 0
3 years ago
Ty has 230 pages of text to read in the next three days. if he averages 25 pages every 1 1/4 hours, how many hours is he going t
sineoko [7]

Answer:

11.5 hours

Step-by-step explanation:

25 pages every 75 minutes (1 1/4)

Thats means 1 page every 3 minutes (divide 25 and 75 by 25 to get this)

230 pages would mean 690 minutes (times the 3 by 230)

690/6 = 11.5

7 0
3 years ago
The angle 0 lies in quadrant 1. sin 0=2/5 what is cos 0?
BaLLatris [955]

Answer:

√21/5

Step-by-step explanation:

Took the quiz:D (that’s a fraction btw)

7 0
3 years ago
How to solve number 5.
BabaBlast [244]
Larger?...... I dunno
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