Which of the following can be used to compute `( 34 xx 4 1/2)`?

Which of the following can be used to compute (34xx4(1)/(2))?(30xx4)+(4xx4(1)/(2))(b)(34xx40)+(34xx(1)/(2))(c)(30xx4(1)/(2))+(4xx4)(d)(34xx(1)/(2))+(30xx4)+(4xx4)

Compute: (3 xx 2)!

Compute: 3! xx 2!

Compute the 3!xx4!

Compute: (5 xx 2)!

Which of the following was used in first generation computers?

Compute: 5! xx 2!

Which of the following devices is NOT used to enter data into a computer?