i am in the middle of a test! will give brainliest and 30

it’s a circle has a circumference of a 28 π centimeters (cm) then what is it’s area in centimeters squared?

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

Add the two expressions 3.8b - 7 and 2.9b + 9 enter your answer in simplified form

Use the quadratic formula to solve the equation. if necessary, round to the nearest hundredth. x^2 - 8 = -6x a. –7.12, 1.12 b. 7.12, –1.12 c. 7.12, 1.12 d. –7.12, –1.12