Math SAT question emergency

  1. What is the average (to the nearest tenth) of the following numbers: 91.4, 91.5, 91.6, 91.7, 91.7, 92.0, 92.1, 92.3, 92.3, 92.4?

(A) 91.9
(B) 92.0
© 92.1
(D) 92.2
(E) 92.3

Please explain how you choose to round off the nearest tenth when you have decimal numbers.
Like, for instance, 596.9789 - how do you round this number to its nearest 10th? or nearest 100th? do you choose the decimal 10th or the other 10th place?

@rahuilmars231 I’m confused. Your other threads state you have a 2300 on the SAT and published a paper on photonics, yet you’re asking how to round numbers?

Anyway, 596.9789 rounded to the nearest tenth is 597.0. 596.9789 rounded to the nearest hundredth is 596.98. You should be able to figure if out.

Hi @MITer94. I did not score 2300 on the sat. I hope to do so. I mentioned that in the other threads (referring to it as a hopeful score). And my iPhone autocorrected bioinformatics to photonics. I interned at a pharmaceutical company and worked with a professor.I discovered the compound NRC-19 through computer-aided drug design programme, which We believe can cure imatinib mesylate-resistant chronic myeloid leukemia.
By the way, I screw up on the most minor questions in Math out of recklessness or maybe I’m just dumb. and I spent so much time expanding my LGBT ngo the past year that I didn’t even care to study for the sat. I’m afraid im gonna suffer the consequences now.
Anyway, thanks for the response sir/Ma’am. I appreciate it.

@rahuilmars231 okay. I’m assuming you applied for admission for the fall of 2016 and are taking the Jan. SAT?

Anyway, being able to deal with numbers and data is crucial if you are doing anything related to bioinformatics, so knowing how to round and use significant digits correctly is a must-have.

@MITer94, Indeed. However, like I said, I just flip out over basic Math problems and am trying to wean myself off that recklessness. I haven’t grappled with Math in my research as protocol demands staunch verification and consistent analysis, which don’t leave room for flaws as tiny as rounding numbers.

@rahuilmars it’s perfectly fine to review basic math concepts that you may have forgotten or don’t often use (I do this every now and then as well). I was just a little surprised at the rounding part, since you typically have to be mindful of significant figures when reporting data, for example.

So, what is the correct answer to your original math question?

My question is what the “emergency” was.

Here’s info on rounding numbers: http://www.calculatorsoup.com/calculators/math/roundingnumbers.php

@MITer94, The answer is 91.9
For starters, 91.9 is the average and in order to round the 10th place, we should look for the digits placed on the right hand side of the 10th place digit. However, there’s none here after 9. So 91.9 is correct. If it was 91.93, answer would still be 91.9. However, if the number was 91.97, it would be 92.
Thank you SOO MUCH for your help :slight_smile:

@bjkmom, I just have 4 more days to finish studying for the SAT, so those irritating words are attempts to get people’s attention so that i can get my queries clarified soon thats all. But the links you provided are proving to be extremely helpful. SO THANK YOU SOOO MUCH! :slight_smile:

@rahui12lmars231 Google is your friend.
This animation shows how easy it is to find answers on your own, especially when you are in a mad rush: click on this link http://bfy.tw/3mjG.

OK, I just gave you my sage advice on the other thread, so I won’t repeat it.

Another great site for all things math is http://www.regentsprep.org/

It’s run by the city of Oswego NY to prepare kids for NY’s Regents exams-- not specifically the SAT. But they do a great job of explaining how to approach most of high school math, ( and lots of other high school classes) if you can just figure out what to call the problem you’re stuck on.

With that, no matter how busy I am, I’ll try to help you.