Answer:
Step-by-step explanation:
Let
j ------> the number
we know that
The square of a number is equal to multiply the number by itself
so
The square of j is
so
Two-fifths of the square of a number j is the same that multiply the fraction 2/5 by the square of j
The surface area of the rectangular prism is of 144 m².
<h3>What is a rectangular prism?</h3>A rectangular prism is a solid that has three dimensions:
It's surface area is given by:
In this problem, the dimensions are: .
Hence:
The surface area of the rectangular prism is of 144 m².
You can learn more about surface area of a rectangular prism at brainly.com/question/17223528
Answer:
The average score is equal to 88.5
Step-by-step explanation:
we know that
An average test score is the sum of all the scores on an assessment divided by the number of test-takers.
so
The sum is equal to
The number of test-takers is n=12
The average score is equal to
substitute