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Leya [2.2K]
4 years ago
9

A local grocery store tested spinach samples for E coli bacteria using two different tests. The first test has a 94% probability

of giving accurate results, while the second test is accurate 89% of the time. A sample that contains E coli bacteria is tested. The probability that both tests detect the bacteria is -----%
Mathematics
2 answers:
nikdorinn [45]4 years ago
4 0
As a percentage- 83.66%
skad [1K]4 years ago
3 0
If you add the numbers then divide you get 91.5%. Not sure if that is the correct way to do it though. Sorry if it’s not.
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Javier is shopping around for a new cell phone provider. He is considering two different plans. Plan 1 has a monthly fee of $15
siniylev [52]

Answer:

He would have to talk 200 minutes.

Step-by-step explanation:

Since 30 divided by .15= 200. And there is a .15 cent cost per minute meaning Javier would have to talk for 200 minutes for the prices to be equal.

Have a great day!

8 0
3 years ago
What is the value of x?
nalin [4]

Answer:

  x = 42.9 m

Step-by-step explanation:

Corresponding sides of similar triangles MAB and MNP are proportional. This means ...

  x/MP = MA/MN

However, we don't have a number for MA yet, so we need to find it.

  MA +AN = MN

  MA = MN - AN            subtract AN

  MA = 67.2 m - 32 m = 35.2 m

Now, we can use this to find x.

  x = MP · (MA/MN) = (81.9 m) · 35.2/67.2

  x = 42.9 m

4 0
3 years ago
3(x-5)-15=48 how would this be solved?
natita [175]
<span>Problem: 3(x-5)-15=48

1. Multiply what's in the parenthesis
3x-15-15=48

2. Combine like terms
3x-30=48

3. Switch the sides
3x=48+30
3x=78

4. Divide

x=26

Answer: 26

</span><span>
</span>
5 0
3 years ago
Find the area of the trapezoid by decomposing it into other shapes.
omeli [17]

Answer:

(C) 38 cm²

Step-by-step explanation:

Top length = 6 cm

Bottom length = 5 + 8 = 13 cm

Area

= 1/2 ( 6 + 13) (4)

= 1/2(19)(4)

= 38 cm²

6 0
3 years ago
Read 2 more answers
two people were doing yard work for 1 hour and 35 minutes then they stopped for lunch at 1:20pm at what time did they start doin
MrMuchimi

Answer: The answer would be at 11:45.

Step-by-step explanation: First I though, if they stoppedd for lunch at 1:20 and they've been doing yard work for 1 hour and 35 minutes, I would subtract. 1 hour taken away from 1:20 would be 12:20. Then, since it would be hard to subtract 35 minutes from 12:20, 35 minutes - 20 minutes = 15 minutes. 12:20 subtract 20 minutes = 12:00. 12:00 - 15 minutes equal to 11:45. I hope this helps. I know this explanation can be confusing but it's the best I can do at the moment.

<h3 />
4 0
4 years ago
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