Geometry and stuff
Help cause I’m dumb :)

What is the value of the missing angle

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

Tom drove 206 miles in 3.9 hours. estimate his average speed.

The half-life of a certain material is 0.002 second. approximately how much of a 14-gram sample will be left after 0.004 second? a. 12 grams b. 3.5 grams c. 0.06 gram d. 7 grams