Use the law of cosines to solve the triangle.
a=45,b=30,c=72

Find the height of a square pyramid that has the volume of 32 ft.³ and a base lengthof 4 feet

The perimeter of a triangle is 69 cm. the first is 5 cm shorter than the second side. the third side is twice as long the first side. find the length of each side

45% of the trees in a park are apple trees. there are 27 apple trees in the park. how many trees are in the park in all?