Answer:
Step-by-step explanation:
x-30% 0f x=70
x-30/100*x=70
100x-30x/100=70
70x=70*100
x=7000/70
x=100
Answer:
t = 5(2) + 3
Step-by-step explanation:
You want the t on the outside because that is what you are trying to figure out.
You take the five, multiply it by 2, and then add 3 to what you get. Then thats the answer.
Answer:
3^2
Step-by-step explanation:
=3^3+3/3^4
=3^6/3^4
=3^6-4
=<u>3^2</u>
Answer:
The probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is P=0.412.
Step-by-step explanation:
We know the population proportion π=0.8, according to the 2011 National Survey of Fishing, Hunting, and Wildlife-Associated Recreation.
If we take a sample from this population, and assuming the proportion is correct, it is expected that the sample's proportion to be equal to the population's proportion.
The standard deviation of the sample is equal to:

With the mean and the standard deviaion of the sample, we can calculate the z-value for 0.79 and 0.81:

Then, the probability that between 79% and 81%of the 500 sampled wildlife watchers actively observed mammals in 2011 is:

_____
7.75 | 125
we want to get rid of that decimal....so we move it 2 spaces to the right....by doing that, we also have to move the decimal under the division sign by 2 spaces to the right....turning ur problem into :
16.1 R 225 <== ur answer
______
775 |12500.0
775
------- subtract
4750
4650
---------subtract
1000
775
-----------subtract
225