Further Math Exam 1: Answers + Discussion!

[I am simba]

Tentative solutions for Business related maths:
1.D
2.C
3.C
4.E
5.C
6.D
7.B
8.D
9.D

[jamespala]

All but 9 is correct. For question 9 you didn't calculate the interest that would also have to be payed on the $802.39. The answer should be E.

Damn well thank you for the correction

[IntelxD]

Damn well thank you for the correction

No problem. Keep your head up though, you still have exam 2 in which you can redeem yourself.

[NamasteLjubo]

34/40 and a fantastic 5/9 in Graphs 

[Dan1995]

(I may be wrong here...)
two heights = 6 and 9
9/6 = 1.5 = k
k^2 (because area) = 2.25
2.25x = 180
x = 80

The height of the second cone is 15, you need to add the two together.

[brenden]

Can someone with a CAS confirm the Business question 9 is D? Someone on Facebook reckons it's E, there's a really minimal difference between the answers (CAS is at my Dad's house )

[NamasteLjubo]

Question 9 for Business is E not D.

[jamespala]

Damn well thank you for the correction

Thank you still i've lost 4 stupid marks hahaha hopefully study score of atleast 40 is still in reach

[brenden]

Thank you still i've lost 4 stupid marks hahaha hopefully study score of atleast 40 is still in reach

Definitely still within reach.

[spectroscopy]

is the OP being edited to keep up with errors?(if there are any)

[vcestudent123]

I also don't understand how question 6 is A. The third quartile (37th dot) is clearly located above ~46-47 ish, and E is the only answer that reflects this.

I graphed it on my calc and it displayed Box plot similar to E.

[aejays]

I got all the same for Core, Geo & Trig, Graphs and Matrices.

BUT. When I checked with a friend, he got all the same as me except question 5 in graphs about the average speed of the train.
So what he did was find the average of the two periods of time the train was actually moving, and excluded the time it stopped, so he got D (65) as the answer. I took "the average speed of the train...for the journey" to mean for the whole journey and ended up with A (45). What about you guys?

[cambo6torres]

pretty sure question 9 in bus math is E because you forgot to add interest the last payment. I wrote D but im pretty sure that's wrong.

[Dan1995]

is the OP being edited to keep up with errors?(if there are any)

I've updated the core, trig, networks and matrices module as the answers are confirmed and discussed, the moderators have been changing the other modules as necessary.

[aejays]

I also don't understand how question 6 is A. The third quartile (37th dot) is clearly located above ~46-47 ish, and E is the only answer that reflects this.

You have to find the IQR of the data (20) and find the upper fence = 50 + 1.5 x 20 = 80. So there were actually only 2 outliers.