Question

Lesson:Exponential Growth and Decay

I got a 30% on my review . I want to know the correct answers and where i went wrong

These are the questions

1. http://prntscr.com/b641xj I got A. for this one

2.http://prntscr.com/b6430l I originally chose B. Im thinking its D now.

3.http://prntscr.com/b643dm

4.http://prntscr.com/b643v5 I originally chose B. for this too. I dont know .


5.http://prntscr.com/b644bd I originally picked C. for this .

Can someone please help me?

Answer 1

@zepdrix can you help me? (:

Answer 2

1. Correct

Answer 3

Hmm both answers you're leaning toward in number 2 declare that
One half is `larger than` one.

See a problem here?

Answer 4

Yes

Answer 5

1/2 < 1, ya? :)
So clearly it's either A or C.

Answer 6

When you take a number less than 1,
and multiply it by itself, it keeps getting smaller.
Example: \(\large\rm .5\times.5=.25\)
Which in fraction form would be: \(\large\rm \frac12\times\frac12=\frac14\)

So we have decay, ya?
The base is less than 1, so it keeps getting smaller.

Answer 7

Can you use that information to figure out number 3?

Answer 8

Oh I see

Answer 9

I think so

Answer 10

I know that it's 2>1

Answer 11

Using your Example, It's growth right? @zepdrix

Answer 12

good good good, larger than 1, so it gets bigger when we take powers of it.

Answer 13

Okay, Im going to try the number 4

Answer 14

Okay so for number 4 Im thinking A since Less than 1 @zepdrix

Answer 15

yay good job

Answer 16

Thankyou so much for helping me understand that !

Answer 17

ok with with the last one?
It's mostly just plug and chug :)

Answer 18

Okay

Answer 19

Im thinking A @zepdrix

Answer 20

P=50,
n=5,

\(\large\rm B=50(1.08)^5\)

Answer 21

So whatever that gives us,
use a calculator.

Answer 22

Okay Thankyou!!

Answer 23

I aced my test (: Thanks @zepdrix