Simplify the expression: (3 + 8i) − (4 + 2i).
−1 + 6i
−1 + 10i
1 + 6i
1 + 10i

Imagine a new pasture with grass growing on it. every day after the seeds have germinated, the number of blades of grass in the pasture triples. after 18 days, the entire pasture is completely covered in grass. how many days did it take for the pasture to be one-third covered in grass?

What is the circumference of a circle with an area of 50.24 cm²?

Calculate the average rate of change over the interval [1, 3] for the following function. f(x)=4(5)^x a. -260 b. 260 c. 240 d. -240