Graham’s monthly bank statement showed the following deposits and withdrawals: $
25.20
,

$
52.75
,

−
$
22.04
,

−
$
8.50
,

$
94.11
$25.20, $52.75, −$22.04, −$8.50, $94.11



If Graham’s balance in the account was
$
47.86
$47.86 at the beginning of the month, what was the account balance at the end of the month?

If n stands for number sold and c stands for cost per item, in which column would you use the formula: ? a. column d c. column f b. column e d. column g

What could explain what happened when the time was equal to 120 minutes

1- is the product of two rational numbers irrational or rational? first, make a hypothesis by multiplying two rational numbers. then, use variables such as x=a/b and y=c/d and the closure property of integers to prove your hypothesis. 2- what do you think the product of a nonzero rational number and an irrational number is? is it rational or irrational? make use of variables, the closure property of integers, and possibly a proof by contradiction to prove your hypothesis. 3- why do we have to specify that the rational number must be nonzero when we determine what the product of a nonzero rational number and an irrational number is? if the rational number were 0, would it give us the same result we found in part b?