1. At the grocery store checkout, you watch at the register as it rings up your purchases and coupons. The prices were as follows:

$2.95
$1.19
$4.61
$1.74
$3.04
$8.83
$1.16
– $0.75 (coupon)
– $1.00 (coupon)

The register gives your total bill as $21.77. Estimate the total amount of the bill and use your answer to determine whether the total on the register is reasonable.

I think that the total number of the bill is reasonable.

Justify your answer please.

To estimate the total amount of the bill, we can add up the prices of the items at the grocery store checkout. Let's break down the process step by step:

Step 1: Add up the prices of the items:
$2.95
$1.19
$4.61
$1.74
$3.04
$8.83
$1.16

To find the sum, you can add up these numbers:
$2.95 + $1.19 + $4.61 + $1.74 + $3.04 + $8.83 + $1.16

Step 2: Calculate the total:

$2.95 + $1.19 + $4.61 + $1.74 + $3.04 + $8.83 + $1.16 = $23.52

So, the estimated total amount of the bill is $23.52.

Step 3: Determine if the total on the register is reasonable:

The register gives a total bill of $21.77. Since the calculated estimated total is $23.52, we can compare the two amounts.

$23.52 - $21.77 = $1.75

The difference between the estimated total and the register's total is $1.75. This means that the register's total is $1.75 less than the estimated total.

Therefore, the total on the register is less than the estimated total. It seems reasonable that the register's total could be slightly lower due to the two coupons that were applied, which accounted for a total of $1.75 discount.

Overall, the register's total of $21.77 is within a reasonable range when considering the estimated total and the coupons applied.

What do you think?

I agree.

(b) Using your estimate, determine whether the total on the register is reasonable. Justify your answer.