7.1-7.4 Review

What is the simplified for of 3a⁴b^-2c^3?

• (81a⁴c³⁾/(b²)
• (81a⁴)/(b²c³)
• (3a⁴)/(b²c³)
• (3a⁴c³)/(b²)

What is -a^-2 if a =-5?

• -25
• 25
• -1/25
• 1/25

Which of the following simplifies to a negative number?

• -4^-4
• (-4)^-4
• 4^-4
• 1/(4^-4)

Which of the following expressions is written in scientific notation?

• 73.4 X 10⁵
• 0.09 X 10⁷
• 80 x 10³
• 4.22 x 10^-5

Which of the following is .0000000708 written is scientific notation?

• 7.08 x 10^-8
• 7.8 x 10^-8
• 708 x 10^-10
• 70.8 x 10^-9

Which expression represents the largest number?

• 40.1 x 10^-6
• 4.1 x 10^-7
• 0.411 x 10^-6
• 0.04001 x 10^-5

What is the simplified form of (-3x³y²)(5xy^-1)?

• (-15x³)/(y²)
• -15x³y²
• -15x⁴y¹
• 15x⁴y¹

What is the simplified form of -9m^-2n⁵ ⋅ 2m^-3n^-6?

• -18m⁵n
• (-18)/(m⁵n)
• (-18m⁶)/(n³⁰⁾
• -18m⁶n³⁰

What is the simplified form of (3.25 x 10³)(7.8 x 10⁶) written in scientific notation?

• 2.535 x 10¹⁰
• 2.535 x 10¹⁸
• 2.535 x 10¹⁹
• 25.35 x 10⁹

What is the simplified form of (2 x 10²)² in standard notation?

• 4.0 x 10⁴
• 2.0 x 10⁴
• 40000
• 20000