Final answer:
Makayla's total number of questions on her science final exam was 20, given that she correctly answered 14 questions and earned a grade of 70%.
Step-by-step explanation:
To solve the problem of determining the total number of questions on Makayla's science final exam, given that she answered 14 questions correctly and earned a grade of 70%, we can set up a proportion. The percentage she earned represents 70% of the total questions, where 14 is her correct answer count and we want to find the total number of questions, which we'll call 'x'.
So, the equation to solve is (14 / x) * 100 = 70. To find 'x', we'll divide both sides by 100 and then solve for x by dividing 70 by the percentage equivalent of 70%, which is 0.7. So, x = 14 / 0.7, which equals 20. Therefore, there were a total of 20 questions on the science final exam.