Final answer:
There were 20 questions on the quiz.
Explanation:
Let's denote the total number of questions on the science quiz as "x." Since Molly got 0.85 of the problems correct and received a score of 17, we can set up the equation:
0.85 * x = 17
To find the total number of questions (x), we can solve for x by dividing both sides of the equation by 0.85:
x = 17 / 0.85
Calculating this, we find that x equals 20.
Therefore, there were 20 questions on the science quiz.