Question

HELP ME PLZ

Answer 1

why dont u use mathway.com it helps?!

Answer 2

i know how to do this but i don't know why i keep getting a wrong answer?

Answer 3

okay what did u get....go step by step.?

Answer 4

i got this 1.5159=(4+r)^(44)

Answer 5

hold on lemme see...

Answer 6

i think its 3.8

Answer 7

can you show me what you did ?

Answer 8

i was guessing lmao i hate math!

Answer 9

sorry:/

Answer 10

wait i think i got it....wait

Answer 11

what you get?

Answer 12

anyone can show me how to solve this?

2976.45=1963.45(1+r/4)^4(11)

Answer 13

You have an equation of the form:

a = b(x^n)

That will equal:

a/b = x^n -> ln(a/b) = ln(x^n) -> ln(a/b) = n times ln(x)

[ln(a/b)] / n = ln (x)

e^( [ln(a/b)] / n ) = e^[ln(x)] = x

"x" is your expression in parentheses, the 1 + a quarter of the rate.

Answer 14

what is that?? the formula i wrote is correct

Answer 15

Yes, your formula is correct and it matches mine. I am just using a general symbol method. For you to do some work here, you only have to make the substitutions and solve.

Answer 16

i dont understand that can you please just show me how to solve that formula i did it several times and got a wrong answer PLEASEE i beg you im so tired

Answer 17

You can do this!

2976.45=1963.45(1+r/4)^4(11)

a = 2976.45, b = 1963.45, n = 44

Just make those substitutions and follow my solution method. Just plug in and follow the steps.

Just try it. If you are that tired, I can give you a little more, but we tutors can't just give answers, we are required to show students how to solve and and top of it the students are supposed to do the work. I'll help as much as I can, but I can't just give ans answer.

Answer 18

Start by dividing both sides by what "b" is. It will start to isolate that exponential expression on the right-hand side.

Answer 19

i didd this many timessss im telling youu i just want to see where i went wrong i end up with 1.5159=5+r

Answer 20

^44

Answer 21

1.5159=(1+r/4)^4*11

Answer 22

then- 1.5159=5+r^44 im not sure about 5 than what do i doo

Answer 23

Good so far, keep going.

Answer 24

Wait, hold on.

Answer 25

This is where you went wrong. And before I show you, I just quickly want to say that doing it this way, you will learn. If I just did the steps, no way is anyone going to learn. This is learning by mistakes. Don't be afraid of mistakes.

Now,

The (1 + r/4) has to stay in parentheses for quite a while. Always respect the parentheses. They take precedence over the exponentiation. If you don't like that long expression in parentheses, call it "x" for now.

Answer 26

So, I'll take over from here for a little while and give you a little break. Hold on while I type.

Answer 27

1.5159286 = (1 + r/4)^44

ln 1.5159286 = ln [(1 + r/4)^44] = 44 times ln [(1 + r/4)]

(ln 1.5159286) / 44 = ln [(1 + r/4)]

e^[(ln 1.5159286) / 44] = e^(ln [(1 + r/4)]) = (1 + r/4)

Answer 28

Are you still getting this or did you get lost anywhere along the way? Should I stop or go on?

Answer 29

i dont understand the way you type i have all the steps in my paper can you just give me the second to last line of this problem so i can see if its the same i get 1.0094=4+r

Answer 30

then i have to take away 4 from each side

Answer 31

i keep getting an negative number

Answer 32

ok, we'll do it that way. Hold on.

Answer 33

1.5159^1/44=4+r^1/44

this is where i can stuck putting it to the power of ^1/44 i get 1.0094 which idk is right or not please help me fast its late

Answer 34

e^[(ln 1.5159286) / 44] = e^(ln [(1 + r/4)]) = (1 + r/4)

e^[(ln 1.5159286) / 44] - 1 = r/4

4(e^[(ln 1.5159286) / 44] - 1) = r

The right side is the rate. The left side is:

0.03800011

That's 3.8%

Answer 35

That's the annual rate. It's 4 times the quarterly rate of:

0.9500028 percent.

Answer 36

so where did i go wrong

Answer 37

I know it's late and you're tired, so tomorrow, you might want to go over all of this. I strongly recommend this.

Good working with you and thx for the recognition.

More importantly, just hang in there!

You went wrong by taking that 1 + r/4 out of the parentheses. That stays in there until the very end.

Answer 38

Fast? It's going to take me a while just to read it!

Answer 39

thats fine

Answer 40

Well, I got problem #11, it's "b", not "c" like you have it, but you were not far off.

Answer 41

thanks

Answer 42

#12 is quarterly, not monthly. I don't think you are getting this just yet. You need to practice this a lot more.

Answer 43

these are practice problem i did like 50 and these are the ones i wasnt sure about

Answer 44

i just want to know which ones i need to practice more

Answer 45

how are 13 and 14 last two?

Answer 46

im sure about the rest just not these 4

Answer 47

You had #11 and #12 wrong and I got you right answers. I figured out #13 (didn't look at #14 yet). I need to see your work since you are not getting these right. Show me your work on #13.

Answer 48

my work is on paper its going to take me a while to type but i think 13 is okay

Answer 49

Yes, #13 is definitely 88.

Answer 50

for 14 i think its wrong

Answer 51

What is "n" and "an"?

I don't get what those expressions mean. To do this problem, I need to know what "n" and "an" stand for.

Answer 52

thats what im trying to figure out

Answer 53

Not the values, what is the meaning of "n" and "an"? They stand for something even before we figure out the values.

Answer 54

i think n is number of cells and an is days or vise versa thats what im trying to figure out

Answer 55

i'll just go with A

Answer 56

Hold, on I figured it out algebraically.

Answer 57

I'm just trying to relate my answer back to the crazy notation in the problem.

Answer 58

You're going to have to help with relating the answer back to the problem's notation, but here it is in how I look at it:

For any day, starting with the 3rd day, that day's number of cells is:

[2 x (# cells in previous day)] - (# cells in previous to previous day) + 3

"previous day" is "day - 1"

"previous to previous day" is "day - 2"

Making sense?

Answer 59

yeah

Answer 60

I checked this answer out up to 88, which is day 7. Can you get this back into that crazy notation?

Answer 61

not really other than -1

Answer 62

Well, I know my formula works like a charm. We could try together to get that into the notation from the problem, but I still don't know about that "an" and "n". Are you sure that that problem was written down right?

Answer 63

While you're answering that, I'm working on that notation.

Answer 64

its A for sure thanks for your help

Answer 65

Yes, I just confirmed A. I figured out the notation, but you might want a bit of explanation on it.

Answer 66

I don't know where that post of yours went, I don't see it anymore, but A was correct, for sure.

Answer 67

Well! It looks like we're done! Nice working with you and good luck in everything!

Answer 68

Your so nice thank you so much please keep in touch please

Answer 69

And you're nice, too! You made my day! :-)

Answer 70

btw, "an - 1" is the # of cells in the previous day, but I think you know that by now.

Answer 71

And this was exhausting!