Approximation, number base and algebra

What is the approximated value of 2796 to 2 significant figures?

• 2900

• 800

• 2800

• 2700

25.979 to 3 significant figures

• 25.97

• 25.9

• 26.9

• 26.0

Convert 1011₂ to base 10

• 8

• 11

• 12

• 7

110₂

+11₂

• 1001₂

• 111₂

• 1010₂

• 1110₂

An acute angle is

• Less than 90⁰

• Greater than 90⁰ and less than 180⁰

• Greater than 180

• 360⁰

1111₂ +101₂

• 1010₂

• 10100₂

• 1110₂

• 11000₂

1010₂ + 110₂

• 11011₂

• 10100₂

• 1110₂

• 10000₂

11010₂ - 101₂

• 10101₂

• 11011₂

• 10001₂

• 11110₂

What is the range of the following numbers: 18, 22, 16, 35, 29, 43, 41, 52

• 30

• 26

• 36

• 12

15x+2y-3x+6y=

• 12x+8y

• 9x-3y

• 12x+9y

• 10x+4y