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3 years ago

What kind of quadrilaterals is this?

Mathematics

2 answers:

DanielleElmas [232]3 years ago

6 0

Answer:

Trapezoid

Step-by-step explanation:

AfilCa [17]3 years ago

6 0

Answer:

This quadrilateral is a trapezoid.

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A new medical test provides a false positive result for hepatitis 2% of the time that is a perfectly healthy subject being teste

Oxana [17]

Given that X be the number of subjects who test positive for the disease out of the 30 healthy subjects used for the test.

The probability of success, i.e. the probability that a healthy subject tests positive is given as 2% = 0.02

Part A:

The probability that all 30 subjects will appropriately test as not being infected, that is the probability that none of the healthy subjects will test positive is given by:

 $P(X)={ ^nC_xp^x(1-p)^{n-x}} \\ \\ P(0)={ ^{30}C_0(0.02)^0(1-0.02)^{30-0}} \\ \\ =1(1)(0.98)^{30}=0.5455$


Part B:

The mean of a binomial distribution is given by

 $\mu=np \\ \\ =30(0.02) \\ \\ =0.6$

The standard deviation is given by:

 $\sigma=\sqrt{np(1-p)} \\ \\ =\sqrt{30(0.02)(1-0.02)} \\ \\ =\sqrt{30(0.02)(0.98)}=\sqrt{0.588} \\ \\ =0.7668$


Part C:

This test will not be a trusted test in the field of medicine as it has a standard deviation higher than the mean. The testing method will not be consistent in determining the infection of hepatitis.

5 0

3 years ago

What is 59.36 Repeated as a fraction

Bas_tet [7]

Answer:

1484/25 is 59.36 as a fraction

3 0

3 years ago

Cameron bought a packet of 45 bars of chocolate.He ate one fifth of them on Tuesday.He ate a twelfth of the remaining bars on We

Vlad1618 [11]

He bought 45 bars of chocolate.

1/5 x 45 = 9
He ate 9 bars on Tuesday.

45 - 9 = 36
He had 36 bars left.

1/12 x 36 = 3
He ate 3 bars on Wednesday

36 - 3 = 33
He had 33 bars left.

------------------------------------------------
Answer: He had 33 bars left.
------------------------------------------------

6 0

3 years ago

Read 2 more answers

A car rental agency advertised renting a car for $28.95 per day and $0.33 per mile. If Trevor rents this car for 4 days, how ma

Gnom [1K]

Answer:

406.67 miles

Step-by-step explanation:

250=28.95(4)+0.33m

250=115.8+.33m

134.2=.33m

134.2/.33=.33/.33m

m=406.666666667

rounded: m=406.67

4 0

2 years ago

If the discriminant of a quadratic equation is equal to -8, which statement describes the roots?

sp2606 [1]

Answer:

Step-by-step explanation:

A discriminate of -8 is never going to give you a real root. D is wrong

You cannot have just 1 complex root, nor can you have just 1 real root unless the discriminate is 0. A and C are both wrong for the same reason. 1 complex root is impossible. They come in pairs.

So the answer is B. You have 2 complex roots.

7 0

3 years ago