Do you guys know how to multiply decimals because i can’t i forgot! what’s 87.8 times 66.4

In triangle abc segment de is parallel to the side ac . (the endpoints of segment de lie on the sides ab and bc respectively). find de, if ac=20cm, ab=17cm, and bd=11.9cm;

What is the expression in factored form? 225x^2 - 144 a. 9(5x+4)^2 b. 9(5x-4)^2 c. 9(4x+5)(4x-5) d. 9(5x+4)(5x-4)

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?