8.For a total magnification of 20X, what eyepiece and objective should be used? - a) 10X eyepiece with a 20X objective

b) 5X eyepiece with a 4X objective

c) 10X eyepiece with a 10X objective

d) 5X eyepiece with a 25X objective

Please help I got it wrong it’s not A

Which of the following are causes of coastal erosion? check all that apply. beach grasses and other plants trap windblown sand. wave action carves away the coastline. groundwater under pressure is forced to earth’s surface. artificial structures stop the natural flow of sand along the coast. underground caves collapse as bedrock is dissolved.

Chicken pox and hepatitis are bacterial diseases. true or false?

Which of the following is the earliest era of earth's geologic time scale? cenozoic mesozoic precambrian paleozoic