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Akimi4 [234]
3 years ago
7

Jenny peddled her bike 11 miles in 45 minutes. If she traveled at the same speed,how far would she travel in 225 minutes?

Mathematics
1 answer:
Korolek [52]3 years ago
4 0

Answer:

55 miles

Step-by-step explanation:

11 miles = 45 min

speed = distance/time

speed = 11/45

speed = 0.2444 miles/min

for 225 min, speed is same

distance = speed * time

= 11/45 * 225

=55 miles

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A girl is on a train that is headed East at 100 miles per hour. The girl is walking at 5 miles per hour
nata0808 [166]

Answer: The speed is 105 miles/ hr and  the direction of the train would be East if the girl is the frame of reference.

Step-by-step explanation:

Since we have given that

Speed of train = 100 miles per hour

Speed of girl = 5 miles per hour

Since the girl is moving towards the back of train.

So,it means train and girl are moving in opposite direction.

So, Relative speed would be

100+5=105\ miles/hr

Hence, the speed is 105 miles/ hr and  the direction of the train would be East if the girl is the frame of reference.

7 0
2 years ago
A new test has been developed to detect a particular type of cancer. The test must be evaluated before it is put into use. A med
Troyanec [42]
The tree diagram of the problem above is attached
There are four outcomes of the two events,

First test - Cancer, Second Test - Cancer, the probability is 0.0396
First test - Cancer, Second Test - No Cancer, the probability is 0.0004
First test -  No Cancer, Second Test - There is cancer, the probability is 0.0096
First test - No cancer, Second Test - No cancer, the probability is 0.9054

The probability of someone picked at random has cancer given that test result indicates cancer is  \frac{0.0396}{0.0396+0.0096}= \frac{33}{41}

The probability of someone picked at random has cancer given that test result indicates no cancer is \frac{0.0396}{0.0004+0.9504} = \frac{99}{2377}

7 0
3 years ago
A retailer buys a radio from the wholesaler for $75.00. He then marks up the price by 1/3 and sells it at a discount of 20 %. Wh
Vikki [24]
He sells it at $80 which gives him a profit of $5!
8 0
3 years ago
What is a number between 7.833 and 7.834
dalvyx [7]

7.8335 is a number between 7.833 and 8.834

3 0
3 years ago
Read 2 more answers
I need help with help on the one with the pink circle
podryga [215]

Answer:

15°

Step-by-step explanation:

The line in the middle of the triangle divides it into two triangles.  These two triangles are equal.  You can see this because the given angle (90°) is equal for both sides, and the bottom sides (23) are also equal to each other.  

Since the triangles are equal, this means that the given angle of 75° also applies to the other side.  The total degrees a triangle can have is 180°.  Use the given angles to solve for the unknown angle.

75° + 90° + x = 180°

165° + x = 180°

x = 15°

The angle measure will be 15°.

4 0
3 years ago
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