22
practice testMultiple Choice

Practice Test

Question 22 • Mathematics III

Consider the expression 0 point 8 raised to the x minus 3 power Which of the following is an equivalent expression?

Answer
A
0 point 8 raised to the x over 3 power
B
the fraction with numerator 0 point 8 to the x th power and denominator 0 point 8 cubed
C
0 point 8 raised to the 3 over x power
D
the fraction with numerator 0 point 8 cubed and denominator 0 point 8 to the x th power

Explanation

Use the exponent rule a^(m−n) = a^m ÷ a^n. Thus, 0.8^(x−3) = 0.8^x ÷ 0.8^3, which is the fraction with 0.8 to the x power in the numerator and 0.8 cubed in the denominator.

AI-written and checked against the verified answer.

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