What is the best approximation for the perimeter of a semicircle with a diameter of 12 cm? use 3. 14 to approximate pi. 18. 84 cm 30. 84 cm 61. 68 cm 75. 36 cm.

If i got an 1040 on my psat, what are the chances of being able to get a 1400 on the sat. and are there any recommended ways to study.

How do you work out 21.3-8= show your working. plz

Adult wasps sting caterpillars and inject their eggs into the caterpillars. the larvae feed on the caterpillars, leading to the death of the caterpillars. what kind of a relationship exists between the wasps and the caterpillars? a. the adult wasps are parasites to the caterpillars. b. the caterpillars are parasites to the wasps. c. the adult wasps are commensals, and the caterpillars are hosts. d. the caterpillars are commensals, and the adult wasps are hosts.