How to do Z.11 8th grade IXL
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There are four mutually exclusive groups, therefore, the probability of one item being classified into any of the four groups is 1/4 or 0.25.
The expected number of items is calculated as the product of the probability and the total number of observations. For this problem, the probability of an item being classified to group 1 is 0.25 and the total number of observations is 400. Therefore, the expected number of items is
The expected number is 100.
The expected number of items is calculated as the product of the probability and the total number of observations. For this problem, the probability of an item being classified to group 1 is 0.25 and the total number of observations is 400. Therefore, the expected number of items is
The expected number is 100.
The investment growth is an illustration of an exponential function.
It will take 78.3 years for the investment to reach £29437.2
The given parameters are:
- Initial worth: 645.3
- Rate: 0.05
An exponential function is represented as:
Where:
- a represents the initial value
- r represents the rate.
So, we have:
When the investment becomes 29437.2, the equation becomes
Divide both sides by 645.3
Take the logarithm of both sides
This gives
Make t the subject
Hence, it will take 78.3 years for the investment to reach £29437.2
Read more about exponential functions at: