Context does not dictate when to overestimate and when to underestimate always round down true or false

False

Step-by-step explanation:

If a situation calls for something to be "at least" a number we would typically round up.  For example, if we have a problem that states we need to buy at least $50 worth of items, and solving the problem we get an answer of

x ≥ 6.8,

we would need to round up to 7 items.  6 items is less than 6.8, so it would not work.  However, 7 items is greater than 6.8, so it would work.

If a situation calls for something to be "at most" a number, we would typically round down.  For example, if we had a problem where we could buy at most $100 worth of items, and solving it we get

x ≤ 4.8,

we would round to 4.  We would not have enough money to buy 5 items, so we cannot round up.  However, we can buy 4 items, so we round down to 4.

$450 is the answer.

step-by-step explanation:

30% of 450 = 135

450-135=315

35-60 students are taking math.