The half-life of the radioactive element unnobtanium-47 is 20 seconds. If 176 grams of unnobtanium-47 pharmacy present how many grams are present after 20 seconds

Jose predicted that he would sell 48 umbrellas. he actually sold 72 umbrellas. what are the values of a and b in the table below? round to the nearest tenth if necessary

Cot(90° − x) = 1 the value of x that satisfies this equation is °. a. 60 b. 135 c. 225 d. 315

Anna is constructing a line segment that is congruent to another segment ab. for the construction, which tool should be used to mesure segment ab