Princess poly thinks that the product of (5+3i)(6−4i) gives a real number, which is written as 12+0i using the form a+bi. is she correct? yes, she is correct. the product is the real number 12+0i. no, she is not correct. the product is an imaginary number, 0+40i. no, she is not correct. the product is a real number, but it is 48+0i. no, she is not correct. the product is a complex number, 42−2i.

Ariana starts with 100 milligrams of a radioactive substance. the amount of the substance decreases by 20% each week for a number of weeks, w. the expression 100(1−0.2)w finds the amount of radioactive substance remaining after w weeks. which statement about this expression is true? a) it is the difference between the initial amount and the percent decrease. b) it is the difference between the initial amount and the decay factor after w weeks. c) it is the initial amount raised to the decay factor after w weeks. d) it is the product of the initial amount and the decay factor after w weeks.