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snow_lady [41]
3 years ago
13

Jason inherited a piece of land from his great-uncle. Owners in the area claim that there is a 45% chance that the land has oil.

Jason decides to test the land for oil. He buys a kit that claims to have an 80% accuracy rate of indicating oil in the soil. What is the probability that the land has no oil and the test predicts it has oil?
Mathematics
2 answers:
klasskru [66]3 years ago
7 0

Answer:

Don't take my word for it but I think it would be 55% chance. I'm Probably wrong.

Step-by-step explanation:

Jet001 [13]3 years ago
5 0

Answer:

9% or 0.09

Step-by-step explanation:

Given, chance of land having oil is 45%. Which is 0.45

So, chance of land NOT having oil is  percent. Which is 0.55

Given, kit's accuracy rate of finding oil as 80%. Which is 0.80

So, kit's accuracy rate of NOT finding oil is   percent. Which is 0.20

These 2 events are INDEPENDENT, which means that the probability of one event occurring does not affect the probability of another event occuring.

The formula, if we let the two evens be A and B, is:

P(A and B)=P(A) * P(B)

Now, "the probability that the land has oil (event A)AND the test predicts that there is no oil (event B)" will be:

P(A and B) = P(A) * P(B)

Hence, the probability is 0.09 or 9%

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Taya2010 [7]

Answer:

start witg parentecees, then multiplication then addind and substracting

Step-by-step explanation:

2(x+10)+10-4+5 = 2x + 20 +10 -4 +5

2x+31 is the final answer

5 0
3 years ago
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Zepler [3.9K]
All of Arkansas is between 33 degrees and 36.5 degrees lol
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3 years ago
- 3x + y = 6<br> what is the slope-intercept
tatiyna

Answer:

Slope: 3 Y-intercept: 6

Step-by-step explanation:

You want to put this equation into y=mx+b form so it's easier to tell.

Add 3x on both sides.

y = 3x + 6

The slope is always the coefficient (number) in front of the x in the y = mx + b form. 6 is the y-intercept (reason: the y-intercept is when x=0, and when you substitute 0 for x in this, you get y=6).

5 0
3 years ago
Find the simple interest accrued on a $500 investment made for 2 years at an interest rate of 8% per year.
Artemon [7]

Answer:

3,125 i think sorry if this is incorrect....

Step-by-step explanation:

Answer:

P = $ 3,125.00

Equation:

P = I / rt

Calculation:

First, converting R percent to r a decimal

r = R/100 = 8%/100 = 0.08 per year,

then, solving our equation

P = 500 / ( 0.08 × 2 ) = 3125

P = $ 3,125.00

The principal required to

accumulate interest of $ 500.00

on a rate of 8% per year for 2 years is $ 3,125.00.

3 0
2 years ago
Jimmy is building a rectangular fence for his back yard. If the perimeter of the fence is 300 feet and the width 20 feet longer
IRISSAK [1]

Answer:

Length-65 ft   Width: 85

Step-by-step explanation:

Let's set the length as x, and the width as x+20 (because it is 20 ft longer than length)

We know that 2L+2W=Perimeter

We can substitute x and x+20 in for 2L and 2W, and 300 for Perimeter

New Equation: 2(x) +2(x+20)=300

After Distribution: 2x+2x+40=300

Combine like terms: 4x+40=300

Subtract 40 from both sides: 4x=260

Divide 4 on both sides and you get x=65 (Length)

Add 20 to get width : x+20= 85

I hope it helped! :)

7 0
3 years ago
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