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frez [133]
3 years ago
6

Two trains leave stations 338 miles apart at the same and travel toward each other. One train travels at 75 miles per hour while

the other travels at 55 miles per hour. How long will it take for the two trains to meet
Mathematics
1 answer:
AleksandrR [38]3 years ago
5 0

If they're travelling towards each other;
Effective speed = 75+55 = 130

Distance = 338m

Time= distance/ speed
T= 338/130
T= 2.6 hrs
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Find the area of the regular polygon. Round to the nearest tenth.
JulsSmile [24]

Answer:

110.9\ ft^{2}

Step-by-step explanation:

we know that

If the triangle of the figure is a regular polygon

then

Is an equilateral triangle

Remember that

The equilateral triangle has three equal sides and three equal interior angles

The measure of each interior angle is 60 degrees

To find the area of the equilateral triangle apply the law of sines

A=\frac{1}{2} b^{2}sin(60\°)

we have that

b=16\ ft

substitute

A=\frac{1}{2} (16^{2})sin(60\°)=110.9\ ft^{2}

8 0
3 years ago
The lifetime for a certain type of tre has been shown to be five years the mean) with a standard deviation of 6 months. In a nor
olga_2 [115]

Answer:

2.28%

Step-by-step explanation:

mean = 5 years = 60 months

standard deviation = 6 months

X = number of years the tires will last

P = probability of ...

z = z-score

6 years = 72 months

z = (# of months - mean) / standard deviation

z = (72 - 60)/6

z = 12/6

z = 2

P(X > 72) = 1 - P(X < 72)

= 1 - P(z < 2)    

(using a Standard Normal Probabilities Table we can see that P(z < 2) = .9772)

So:

= 1 - .9772

= 0.0228 OR 2.28%

6 0
3 years ago
Dan buys a car for £2200.
pashok25 [27]

Answer:

£1134

Step-by-step explanation:

0.5%×6 = 3.0% ≈ 3%

\frac{3}{100} × 2200 = 3 × 22 = 66 (we shorten the zeros ⇒ ∅∅)

2200 - 66 = £1134

3 0
3 years ago
How many times bigger is 1.8x10^27 than 1x10^25
victus00 [196]
To find the number of times it is bigger

= \dfrac{1.8 \times 10^{27} }{1 \times 10^{25}}

= 1.8 \times 10^{27-25}

= 1.8 \times 10^{2}

= 180 \text { times}
3 0
3 years ago
Read 2 more answers
the formula d= rt gives the distance traveled in time t at rate r. if a bicyclist rides for 2.3 hours and travels 41 miles, what
jenyasd209 [6]
(41 miles)/(2.3 hours) = 17.83 miles per hour.
5 0
3 years ago
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