What would be a real world example or use of a surface area?

Tanya has $42 to spend at the dolphin island store. tshirts sell for $7 each and a pair of sunglases sells for $6.tanya buys 3 tshirts. how many pairs of sunglases can she buys with the amount of money she has left

The equation x2 – 1x – 90 = 0 has solutions {a, b}. what is a + b?

Maria walks a round trip of 0.75 mile to school every day.how many miles will she walk in 4.5 days