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den301095 [7]
3 years ago
6

A drone travels 180 kilometers in the same time a bird travels 120 kilometers. If the drone's speed is 20 km/hr faster than the

bird, find the speed of each.
​
Mathematics
1 answer:
allochka39001 [22]3 years ago
3 0

Answer:

drone is 60km/h bird 40km/h

Step-by-step explanation:

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Pig 1 worked on his house 3 hours for a day for 10 days.How long did he work
WITCHER [35]
He worked 30 hours in total
3 0
3 years ago
13. Suppose a car dealer sells 2 sport-utility vehicles. How many mid-sized cars must be sold to earn at least S3500?
Alekssandra [29.7K]

Answer:

incomplete information.What is the price of 1 car ?

Step-by-step explanation:

6 0
3 years ago
Read 2 more answers
Thirty percent of the students at a local high school face a disciplinary action of some kind before they graduate. Of those "fe
inna [77]

Answer:

Not independent

Step-by-step explanation:

For two events to be independent, they must not effect each other. For two independent events, changes in one of the event do not cause any change on the other event.

To explain it in terms of probability, let's first define and calculate the probabilities:

P(F) : Probability of facing felony

P(C) : Probability of going to college

P(F ∩ C) : Probability of facing felony and going to college

P(F° ∩ C): Probability of not facing a felony and going to college

Assume we have 100 students:

Faced felony = 0.3 * 100 = 30

Faced felony and go college = 30 * 0.4 = 12

Not faced felony = 0.7 * 100 = 70

Not faced felony and go college = 0.6 * 70 = 42

Total of going to college = 12 + 42 = 54

So P(C) = 54 / 100 = 0.54

If P(F)*P(C) = P(F ∩ C), then these two events are independent. If not, they are not independent.

Let's calculate the probabilities:

As given in the question, 30% of students face felony so P(F) = 0.3

P(C) = P(C ∩ F) + P(C ∩ F°) = 0.12 + 0.42 = 0.54

P(F) = 0.3

P(F ∩ C) = 0.12

P(F)*P(C) = 0.3 * 0.54 = 0.162 which ic not equal to P(F ∩ C). Therefore, these events are not independent.

5 0
3 years ago
A landscaper is making a garden bed in the shape of a rectangle. The length of the garden bed is 2.5 feet longer than twice the
Step2247 [10]

Answer:

I'll setup the problem, then you can do the calculations

Step-by-step explanation:

Perimeter = 2width(W) + 2length (L)

Area = LW

L = 2.5 + 2W

LW = 62.5

substitute L in equation for area

2.5W +  {2W}^{2}  = 62.5 \\  \\  {2W}^{2}  + 2.5 - 62.5 \\  \\  use \:  quadratic \:  solution \\\frac{ - b ±  \sqrt{ {b}^{2}  - 4ac}}{2a}

a = 2; b = 2.5; c = 62.5

send a comment if you have a question

7 0
3 years ago
an airplane is at an altitude of 1,200 feet. It begins to ascend at a rate of 925 feet per minute. How many minutes will it take
Oksanka [162]
You start by subtracting: 16000-1200= 14800
Then you divide 14800 by how many feet the plane rises per minute 
14800/945=16 minutes
The answer is 16 minutes
3 0
3 years ago
Read 2 more answers
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