Question 1 - Using sign charts to determine where f(x) > 0 or f(x) < 0 Practice

Question 1

00:00Est. 3 min

Marks:+3.000.00

Passage

Ritwik wrote

12

mock tests. His score in each mock test

M(n)

is represented as

M(n)=-\frac{n^2}{1000}(n^3-15n^2+50n)+40

, where

n

represents the mock test number, i.e.,

n\in\{1,2,\ldots,11,12\}

. He should score

40

or above to pass the assignment. Based on this information, answer the given sub-questions.

Question

In total, how many mock tests did Ritwik pass? NOTE: Enter your answer to the nearest integer.

Comprehension

Medium Difficulty

16 October 2022

Your answer