Ineed with part a and part b somebody me !

The base of a triangle is 8 1 3 meters and the height of the triangle is the fourth root of 16 meters meters. what is the area of the triangle?

Write the summation to estimate the area under the curve y = 1 + x2 from x = -1 to x = 2 using 3 rectangles and right endpoints

The zoo collects $9.60 for every 24 tickets sold. how much will be collected for 400 tickets?