rosie umbrella shop is selling umbrella for $4.00 off the usua price of $15.00. What is the cost of buying 3 sale umbrellas?

Cost = 3*(15-4) = $33.

The cost $33 because 15-4=11.Then I multipled 11x3=33dollars

To calculate the cost of buying three sale umbrellas, we need to first find out the discounted price of one sale umbrella.

The discount offered by Rosie's umbrella shop is $4.00 off the usual price of $15.00. To find the discounted price, we subtract the discount from the original price:

Discounted price = Original price - Discount
= $15.00 - $4.00
= $11.00

So, each sale umbrella would cost $11.00.

Now, to calculate the cost of buying three sale umbrellas, we multiply the cost of one sale umbrella by three:

Cost of 3 sale umbrellas = 3 * Cost of one sale umbrella
= 3 * $11.00
= $33.00

Therefore, the cost of buying three sale umbrellas at Rosie's umbrella shop would be $33.00.