The first one i need with that one

The 5% sales tax on $87.50 is $4.35, and the total amount is $91.85.

Step-by-step explanation:

To find the 5% sales tax on $87.50, multiply $87.50 by 0.05, obtaining

$4.35.  The total amount due, including this tax, is then $87.50 + $4.35, or $91.85.

The other problems are done in precisely the same way.

so a parallelogram is just like a square base times height. multiply 40 and 39 to get 1560 inches.

a triangle is base times height divided by two. so multiply 7.9 and 5 and then divide it by 2 to get 19.75inches.

the kite can be split into two separate triangles and added together to get the total area. 30 x 4 /2 which equals 60. make sure to double it for the two triangles making 120.

a triangular prism is a 3 dimensional shape composed of triangles and rectangles. it is made from two triangular bases and three rectangular sides.