Adding context - a 30 is at the 95th percentile of all math takers.
OP will get into many business schools - and since they want marketing, they should go for marketing.
Florida doesn’t admit by major - it’s a tough admit overall, but they can study marketing if get in.
UMD, UGA (pre business), Penn State marketing, and Miami are all difficult admits - could go either way but could get in all. FSU will be an in. U of SC and Clemson will be an in.
They can direct admit to IU - safer than any school on the list and higher ranked than any school on the list - especially in marketing.
If they want south, they can toss in a Bama Culverhouse or Auburn Harbert for a safety.
But honestly, since they want “marketing” - which often intersects advertising - the math score is really not a concern.
Is the list appropriate - I’d say so - OSU Fisher, FSU are near assured, UGA, UF, Clemson, UMD, PSU - at least two will happen in my opinion but likely more.
But if OP is that concerned, add an IU (safety at a top school), Pitt, Bama, Auburn, Ole Miss…whichever - just do provide a level of internal security.
Given the major, the where isn’t going to matter much anyway.
But wanted to note a 30 nationally is OUSTANDING.
But when you read the CC, you’d think it’s cause for community college 