Final answer:
The value of x²⁴ for x=28 is calculated by raising 28 to the 24th power, which means multiplying 28 by itself 24 times.
Step-by-step explanation:
The student has asked for the value of x²⁴ where x is a positive real number and x = 28. To find the value of x²⁴, we simply need to raise x to the 24th power. Since x is given as 28, we calculate as follows:
28⁴ = 28 x 28 x 28 x ... (24 times) ... x 28.
This is a arithmetic operation involving the exponentiation of a real number.