The radioactive substance uranium-240 has a half-life of 14 hours. the amount a(t) of a sample of uranium-240 remaining (in grams) after t hours is given by the following exponential function. at = 3900(1/2) t/14 find the initial amount in the sample and the amount remaining after 40 hours. round your answers to the nearest gram as necessary. asap

If m_b=mzd= 43, find mzc so that quadrilateral abcd is a parallelogram o 86 137 o 129 43 description

Pleasseee important quick note: enter your answer and show all the steps that you use to solve this problem in the space provided. use the circle graph shown below to answer the question. a pie chart labeled favorite sports to watch is divided into three portions. football represents 42 percent, baseball represents 33 percent, and soccer represents 25 percent. if 210 people said football was their favorite sport to watch, how many people were surveyed?

Amap has a scale of 3.5 inches = 20 kilometers. if the distance between two cities on the map is 4.9 inches, what is the actual distance between the two cities?