Practice Problems $3\mathrm{.}1$

Evaluate $2+3**4.$

Explain the difference between the assignment statement

var$1=$var$2$

and the assignment statement

var$2=$var$1$

Complete the table by filling in the value of each variable after each line is executed.

$\backslash$table$[[2,a,$b$,$c$],[$Private Sub btnBvaluate Click $(...)$ Handles btnBvaluate.click,eqg,$2,],[$Dim a$,$ b$,$ c As Double,$0,0,0],[a=3,3,0,0],[b=4,3,4,0],[c=a+b,,,],[a=c**a,,,],[$lstResults$.$Items. Add $(a-b),,,],[b=b**b,,,],[$End Sub,,,$]]$

Write a statement that increases the value of the numeric variable var by $5\%.$

EXERCISES $3\mathrm{.}1$

In Exercises $1$ through $6,$ evaluate the numeric expression without the computer, and then use Visual Basic to check your answer.

$3**4$

$7^{{?}^{{?}^{?}}}2$

$\frac{1}{2^{{?}^{{?}^{?}}}3}$

$3+(4**5)$

$(5-3)**4$

$3**((-2{)}^{{?}^{{?}^{?}}}5)$

In Exercises $7$ through $10,$ evaluate the expression.

$7.\frac{7}{\frac{?}{?}}3$

$8.14$Mod$4$

$9.7$Mod$3$

$10.\frac{14}{\frac{?}{?}}4$

In Exercises $11$ through $16,$ determine whether the name is a valid variable name.

$11.$ sales. $2008$

$12.$ room&Board

$13.$ fOrM$\_1040$

$14.1040B$

$15.$ expenses?

$16.$ INCOME $2008$

In Exercises $17$ through $22,$ evaluate the numeric expression where $a=2,b=3,$ and $c=4.$

$17.(a**b)+c$

$18.a**(b+c)$

$19.(1+b)**c$

$20.a^{{?}^{?}}c$

$21.b^{{?}^{{?}^{?}}}(c-a)$

$22.(c-a{)}^{{?}^{{?}^{?}}}b$