Heidi says Christopher should not be so worried about a lower score on his onsite performance since it only counts for 20 percent of his overall evaluation. Is she right?

Find the value of the cosine for angle a

What is the total surface area of this square pyramid?

Si la base de un triángulo isósceles mide 70 m y el ángulo opuesto a ésta mide 58°; entonces ¿cuánto mide la altura de dicho triángulo? a) 21.87 m. b) 40.01 m. c) 43.74 m. d) 63.14 m.