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Ksenya-84 [330]
3 years ago
5

two objects are travelling toward each other on a collision course. One object is doing 800 km / hour. The other is doing 1000 k

m / hour. If they were initially 900km apart how many minutes will it take for them to crash​
Mathematics
1 answer:
sammy [17]3 years ago
6 0

Answer:

Step-by-step explanation:

The relative speed of the two trains is the sum of the speeds they are traveling. (If you're on either of the trains, this is the speed you appear to be moving when you see the other train.) In our problem, the relative speed of the two trains is 70 mph + 60 mph = 130 mph. What if the trains were traveling in the same direction? Then we'd need to subtract the speed of the slower train from the speed of the faster train, and their relative speed would be 10 mph.

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Which sphere has a volume of 0.288Pi in.3? A sphere with radius 0.4 inches. A sphere with radius 0.5 inches. A sphere with radiu
worty [1.4K]

<em>C. A sphere with radius 0.6 inches.</em>

<u><em>Here is why:</em></u>

The equation for the volume of a sphere is:

V=\frac{4}{3} \pi r^3

We can plug in and solve.

V=\frac{4}{3}*\pi *0.6*0.6*0.6

We will multiply everything but leave the 3 to divide later.

So...

4*\pi *0.6*0.6*0.6=0.864\pi

Divide by 3.

0.864\pi /3=

0.288π

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3 years ago
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A starter motor used in a space vehicle has a high rate of reliability and was reputed to start on any given occasion with proba
GuDViN [60]

Answer:

0.095163

Step-by-step explanation:

given that a starter motor used in a space vehicle has a high rate of reliability and was reputed to start on any given occasion with probability .99999

Here we find that for any start, there are exactly two outcomes either success or failure.

Also each start is independent of the other since p = 0.99999 for succss is given constant.

Thus X no of successes is binomial with p = 0.99999 and n =10000

If Y is taken as failure then Y is binomial with p' = 0.00001 and n =10000

Required probability

= the probability of at least one failure in the next 10,000 starts

= 1-P(no failure in 10000 starts)

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Brut [27]

Answer:

the correct answer is D

Step-by-step explanation:

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Answer:

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Rani has at most $20 to spend on a canoe rental. To rent a canoe $12.To use the canoe cost $3 an hour. Write an inequality that
Julli [10]

Answer:

Rani can use the rented canoe for  h\leq 2\frac{2}{3}  hours.

Step-by-step explanation:

Given:

Rani has at most $20 to spend on a canoe rental.

To rent a canoe $12.To use the canoe cost $3 an hour.

The number of hours is h.

Now, to find h the number of hours rani can use the rented canoe.

Total money Rani has at most to spend = $20.

The rent of a canoe = $12.

The cost of using canoe per hour = $3.

<em><u>According to question:</u></em>

Now, to find the number of hours rani can use the rented canoe:

3h+12\leq 20

<em>Subtracting both sides by 12 we get:</em>

<em />3h\leq 8<em />

<em>Dividing both sides by 3 we get:</em>

<em />h\leq \frac{8}{3}<em />

<em />h\leq 2\frac{2}{3}<em />

Therefore, Rani can use the rented canoe for  h\leq 2\frac{2}{3} hours.

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3 years ago
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