Final answer:
The mathematics question asked is about adding two decimal numbers, 8.64 and 2.25. The answer to the addition, reported with two decimal places for significant figures, is 10.89.
Step-by-step explanation:
The student is asking a mathematics question related to basic arithmetic operations and significant figures. To compute 8.64 + 2.25, we simply add the two numbers. Since both numbers are decimals with two digits after the decimal point, the sum should be reported with the same precision.
Let's add the numbers:
8.64
+ 2.25
———
10.89
Therefore, the sum of 8.64 and 2.25 is 10.89, reported with two decimal places.