Bluebook SAT Test SAT Exponents and Radicals Practice 4

Question 1

Which expression is equivalent to (x^4)^(1/2) × x^(−2)?

Accepted Answer

1

Answer

x⁴

Answer

x²

Answer

x^(−4)

Question 2

The half-life of a radioactive element is 10 years. Starting with 640 grams, how many grams remain after 40 years?

Accepted Answer

40

Answer

20

Answer

80

Answer

160

Question 3

Which of the following equals 2^50 × 4^25?

Accepted Answer

2^100

Answer

2^75

Answer

8^75

Answer

16^25

Question 4

Solve: √(3x + 1) = 4

Accepted Answer

x = 5

Answer

x = 3

Answer

x = 7

Answer

x = 9

Question 5

What is the product (2√6)(3√10)?

Accepted Answer

12√15

Answer

6√60

Answer

6√16

Answer

12√5

Question 6

If x^(1/4) = 3, what is x?

Accepted Answer

81

Answer

9

Answer

27

Answer

243

Question 7

Simplify: (x³y⁻²)^(−2)

Accepted Answer

y⁴/x⁶

Answer

x⁶/y⁴

Answer

x⁻⁶y⁴

Answer

x⁶y⁴