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kvv77 [185]
3 years ago
10

On discovering that her family had a 70% risk of heart attack, Erin took a treadmill test to check her own potential of having a

heart attack. The doctors told her that the reliability of the stress test is 67%. What is the probability that Erin will have a heart attack and the test predicts it?
A. 0.099



B. 0.201



C. 0.231



D. 0.469

Thanks to anyone helping.

Mathematics
2 answers:
astra-53 [7]3 years ago
8 0
The answer is .469  its just simply both percentages as percents multiplied together so .7*.67= .469
Nostrana [21]3 years ago
8 0
The answer is 0.469,
You just multiply the percentages. But before you do, make them a simple number. (not percentage).
0.7 × 0.67 = 0.469.

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A train traveled 325 miles in 5hrs. What was the trains average rate of speed in miles per hr ?
Leya [2.2K]

Hi there!

To find the average speed of a moving object all you need to do is divide the distance traveled by the object by amount of time it took the object to reach its final destination. So for this problem it would go like this:

325 ÷ 5 = 65

So for this problem in particular the answer is 65 MPH was the average speed of the train.

Your friend, ASIAX

5 0
3 years ago
The size of the angle of a triangle are are in the ratio 2:4:9 calculate the size of the three angles in degree
solmaris [256]
Total Unit of Triangle = 2+4+9 = 15
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So, Angles = 2(12) : 4(12) : 9(12) = 24 : 48 : 108

In short, Your Angles would be: 24, 48 & 108

Hope this helps!
3 0
3 years ago
Solve (get the variable by itself): m / (-4) = -2.95
kenny6666 [7]
M / -4 = -2.95
As you can see, the variable m is currently in a fraction with a denominator of -4. So to get ride of the fraction and find m and its value, you should multiply both sides by the denominator of the fraction, which is in our case -4.
So m / -4 = -2.95
(m/-4) * -4 = -2.95 * -4
m = 11.8

You can recheck your answer (very important):
m / -4 = 11.8 / -4 = -2.95
The answer has been approved.

Hope this Helps! :)
7 0
3 years ago
What is the value of x in the product of powers below? 6*9 × 6x = 6² (all exponents)
anyanavicka [17]
The answer is -7 i think
4 0
3 years ago
Is 9/16 less than 8/12
Triss [41]
To solve this convert both values to fractions with a common denominator (48):
27/48 32/12
The answer to this problem is False/No because 8/12 is more than 9/16
3 0
3 years ago
Read 2 more answers
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