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Nonamiya [84]
2 years ago
14

What is the speed of a bike that travels 360 meters in 80 seconds

Mathematics
1 answer:
alukav5142 [94]2 years ago
3 0

Answer:

4.5 meters per second, or 270 meters per minute.

Step-by-step explanation:

If you divide 360 by 80, you get 4.5 and if you divide 360 by 1 1/3 (which is how many minutes 80 seconds is), you get 270.

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Person A can paint the neighbors house 2 times as fast as Person B. The year A and B worked together, it took them 2 days. How l
seraphim [82]

Answer:

A can paint in 3days and B in 6 days

Step-by-step explanation:

From the question we were told

Person A can paint the neighbors house 2 times as fast as Person B

Let A only paint the neighbors house in X days

Let B only paint the neighbors house in 2X days

If we express the given information from the question in terms of fraction we have,

1/X + 1/2X = 1/2

3/2X = 1/2

if we cross multiply we have

6= 2X

X= 6/2

X= 3

Then A can paint the house in 3 days and B in 2(3)= 6days.

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3 years ago
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kow [346]
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3 years ago
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Suppose that only 65% of all drivers in a certain state wear a seat belt. a random sample of 80 drivers is selected. what is the
jonny [76]

Answer:

Pr(X >42) = Pr( Z > -2.344)

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Step-by-step explanation:

The scenario presented can be modeled by a binomial model;

The probability of success is, p = 0.65

There are n = 80 independent trials

Let X denote the number of drivers that wear a seat belt, then we are to find the probability that X is greater than 42;

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In this case we can use the normal approximation to the binomial model;

mu = n*p = 80(0.65) = 52

sigma^2 = n*p*(1-p) = 18.2

Pr(X >42) = Pr( Z > -2.344)

                = Pr( Z< 2.344) = 0.9905

7 0
3 years ago
Solve for x in the equation x^2+11x
suter [353]

Answer:

Pretty sure it would be the last one.

Not sure if you want me to do the work. All I can say is that it would be<em> very long.</em>

6 0
3 years ago
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How do you write 2/10 as a percentage
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It’s 20% because 10/10 would be 100% and 1/10 would be 10%
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