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emmasim [6.3K]
3 years ago
7

A 33 gram sample of a substance that's used to detect explosives has a k-value of 0.1467.

Mathematics
1 answer:
romanna [79]3 years ago
3 0

Answer:From the attached graphic, Half-life = ln (.5) / k

Half-life =.693147 / 0.1142

= 6.0695884413 days

Step-by-step explanation:The value of "k" should be negative and should have units associated with it.

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The meat department of a local supermarket packages ground beef using meat trays of two sizes: 1 designed to hold 1 lb of meet a
r-ruslan [8.4K]

Answer:

c) 0.932

99% confidence interval for average weights of all packages sold in small meat trays.

(0.932 ,1.071)

Step-by-step explanation:

Explanation:-

Given random sample of 35 packages in small meat trays produced weight with an average of 1.01 lbs. and standard deviation  of 0.18 lbs.

size of the sample 'n' = 35

mean of the sample x⁻= 1.01lbs

standard deviation of the sample 'S' = 0.18lbs

<u>The 99% confidence intervals are given by</u>

(x^{-} - t_{\alpha } \frac{S}{\sqrt{n} } , x^{-} +t_{\alpha } \frac{S}{\sqrt{n} } )

The degrees of freedom γ=n-1 =35-1=34

tₐ =  2.0322

99% confidence interval for average weights of all packages sold in small meat trays

(1.01 - 2.0322 \frac{0.18}{\sqrt{35} } , 1.01+2.0322 \frac{0.18}{\sqrt{35} } )

( 1.01 - 0.06183 , 1.01+0.06183)

(0.932 ,1.071)

<u>Final answer</u>:-

<u>99% confidence interval for average weights of all packages sold in small meat trays.</u>

<u>(0.932 ,1.071)</u>

5 0
3 years ago
Please help me on this I need help and nobody is really helping
Nady [450]
I believe the answer is (0,0)
3 0
3 years ago
Read 2 more answers
Ows the length of 3 movies in each of 3 categories. Choose the formula that could be used in cell B2.
Artyom0805 [142]
From the choices above, <span>the formula that could be used in cell  is B2.</span>B. 3 * E2 - (C2 + D2).
8 0
3 years ago
Y=2,y=-1/2 thats the equation but it told me to write more idk why
Darina [25.2K]

More information is needed.

8 0
3 years ago
What is the sum in simplest form for 5/8+2/5
Bogdan [553]
(5/8)+(2/5)= 

so you need a common den so in this case its 40

so we multiply to get 40 like

(5/5)(5/8)+ (2/5)(8/8)=

25/40 + 16/ 40 = 41/40
5 0
3 years ago
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