Question

1. envision° stem a scientist was observing a group of wildebeests over two years. one year the herd consisted of 200 animals. in the next year there were 155 wildebeests. how many more animals were in the herd during the first year?

Explanation:

Step1: Identify values

Let the number in first - year be $a = 200$ and in second - year be $b = 155$.

Step2: Calculate difference

$a - b=200 - 155$

Answer:

45