ILL GIVE BRAINLIEST* Manuel incorrectly claimed that the surface area of the cylinder shown is about 693.9 in^2. Use a formula to find the surface area of the cylinder. Use 3.14 for π. What was his likely​ error? The surface area of the cylinder is about ___^2
​(Round to the nearest tenth as​ needed.)

What is the perimeter of an equilateral triangle if each side is (x+3)?

Ellie spent $88.79 at the computer stote. she had $44.50 left to buy a cool hat. how much money did she originally have? write and solve an equation to answer the question.

The students at jefferson middle school are raising money for a charity by selling t-shirts and hats. the number of t-shirts sold was 3 times the number of hats. the profit was $5 for each t-shirt sold and $2.50 for each hat sold. the students raised $840 for the charity. they used the system below to analyze their success and found the solution to be (144, 48). 5x+2.50y=840 x=3y how much did they earn from t-shirt sales?