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Lerok [7]
2 years ago
12

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 not have a heart attack and the test predicts that she will?
A.
0.099

B.
0.201

C.
0.231

D.
0.469
Mathematics
1 answer:
Wittaler [7]2 years ago
7 0
The answer i think is D
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Please could someone help me ?
Juliette [100K]

Answer:

50% of 1/3: 1/2 x 1/3 = 1/6

75% of 1/2: 3/4 x 1/2 = 3/8

Step-by-step explanation:

50% = 1/2

50% of 1/3: 1/2 x 1/3 = 1/6

75% of 1/2: 3/4 x 1/2 = 3/8

6 0
3 years ago
What is the smallest of 3 consecutive positive integers if the product of the smaller two integers is 5 less than 5 times the la
olga55 [171]
Let's say the first number is "a"
the next consecutive can just be "a+1" and  the next, you guessed it, "a+2"
the two smaller ones are a and a+1, the larger one is a+2

now, the product of "a" and "a+1" equals 5 times "a+2" but less by 5

thus   a(a + 1) = 5(a + 2) - 5   <----- solve for "a"
7 0
3 years ago
Rashan says that –6 ÷ 2 = -3. Which multiplication expression can he use to check his answer?
dusya [7]

-3(2)

HOPE THIS WILL HELP YOU

3 0
3 years ago
Adjacent, right angles are complementary.<br> always<br> sometimes<br> never
Harrizon [31]
B. <span>sometimes
is the right answer
</span> <span>Any two angles which add up to 90 degrees are complementary.</span>
8 0
4 years ago
Read 2 more answers
Bobby will buy coffe and hot chocolate for his co-workers each cup of coffe costs $2.25 and each cup of hot chocolate costs $1.5
snow_lady [41]
He buys three cups of hot choclate cause 1.50*3= 4.50
and he buys 5 cups of coffe cause 2.25*5=11.25
and 11.25 + 4.50=15.75

3 0
3 years ago
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