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3 years ago

15

Tim is a car salesman and earns a 5% of the price of the cars he sells. last month he sold 8 cars for a total of $152,558.75. Es

timate the amount Tim earned last month.

1 answer:

s344n2d4d5 [400]3 years ago

8 0

Step-by-step explanation:

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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 <span>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:

</span><span>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:

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

Part B:

The mean of a binomial distribution is given by

</span> $\mu=np \\ \\ =30(0.02) \\ \\ =0.6$
<span>
The standard deviation is given by:

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

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.</span>

5 0

3 years ago

Cooper is a salesperson who sells computers at an electronics store. He makes a base pay amount of $60 per day regardless of sal

VikaD [51]

Answer: p= 1.25x + 70

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3 years ago

BRAINILEST IF ANSWEED QUICKLY AND CORRECT

r-ruslan [8.4K]

Answer:

The answer is B.It is one-half the area of a square of side length 4 units.

Step-by-step explanation:

Given a coordinate grid shown with triangle of measurements with base 4 units and height also 4 units.

We have to find the area of triangle which can be calculated as

⇒

=

we have to choose the statement describes the area of the triangle evaluate above.

Option A: Not matched ∵equals to [area of rectangle of length 4 units width 2 units]=

Option B: matched : given one-half the area of a square of side length 4 units.

⇒

Option C : Not matched : It is twice the area of a rectangle of length 4 units and width 2 units

⇒

Option 4 : Not matched : It is twice the area of a square of side length 4 units.

⇒

So, the correct option is B. It is one-half the area of a square of side length 4 units.

4 0

3 years ago

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Identify the zeros of the function f(x) = 2x2 − 2x + 13 using the quadratic formula.

Pavel [41]

Answer:

x= 1±5i/2

Step-by-step explanation:

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3 years ago

The length and width of a rectangle are 7 cm and (x-8) cm respectively. Find the value of x if the area of the rectangle is 42 c

soldi70 [24.7K]

Given length l=7
width w=x-8
area=42
area=wl
42=7(x-8)
42=7x-56
7x=98
x=98/7
x=14

6 0

3 years ago

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