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2 years ago

14

A nutritionist is interested in estimating the proportion of consumers who look to purchase organic produce. How large of a samp

le would be necessary in order to be 99% confident that the estimate is within 3% of the actual proportion

1 answer:

olga2289 [7]2 years ago

7 0

It 27 because if u do 90% x 3% that will give u 27

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Pls help if your good at math marking brainliest

LenaWriter [7]

Answer:

Step-by-step explanation:

6x-1=2x+5+4x-6

separate the variables in one side, numbers on the other side

6x-2x-4x=1+5-6

0=0

one solution

8 0

3 years ago

A scientist has 100 milligrams of a radioactive element. The amount of radioactive element remaining after t days can be determi

grandymaker [24]

The mass of the first shipment at time t is
$m_{1}=100( \frac{1}{2} )^{ \frac{t}{10}}$

The mass of the second shipment at time t is
$m_{2}=100( \frac{1}{2} )^{ \frac{t-3}{10} }$

At time t, the ratio of m₁ to m₂ is
$\frac{m_{1}}{m_{2}} = \frac{100}{100}. \frac{(1/2)^{t/10}}{(1/2)^{(t-3)/10}} \\ = \frac{(1/2)^{t/10}}{(1/2)^{t/10}}. \frac{1}{(1/2)^{-3/10}} \\ = (1/2)^{3/10} \\ = 0.8123$

Therefore as a percentage,
$\frac{m_{1}}{m_{2}} =100*0.8123 = 81.23 \%$

Answer: B. 81.2%

4 0

3 years ago

4/5 divided by 5 1/2

irina1246 [14]

Answer:

8/55

Step-by-step explanation:

4/5 DIVIDED 5 1/2 = 8/55

6 0

3 years ago

Read 2 more answers

X-3y=7 and 2x-6y=12 solving by elimination

Ber [7]

x-3y=7 2x-6y=12

You can multiply -2 in the first equation like this.

x+6y=7

2x-6y=12

Now you can eliminate 6y and -6y so cross them out and do x-2 which is -1 and 7-12 which is -5 -1/-5 would be .2

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7 0

3 years ago

Jon ran 4 miles in 35<br> minutes. How long did it<br> take him to run a mile

sesenic [268]

Answer:

35/4 minutes per mile

Step-by-step explanation:

rate = time/distance, therefore the answer is 35/4

4 0

3 years ago