Need some help with crucial assignment due tomorrow! Help!

[beautifulconfusion]

Hi! I have an assignment due tomorrow. I need some help with some multiple choice and a few equations. Thank you very much in advance

1. The function y=5(2)^x + 3 has a horizontal asymptote at:
(a) y = -5
(b) y = -3
(c) y = 3
(d) y = 5

2. If a person earns an annual interest rate of 7% compounded annually on an investment of $50, which function shows how much money the investor has at time t, in years?
(a) P(t) = 50(1.07)^t
(b) P(t) = 50(1.7)^t
(c) P(t) = (1.07)^t/50
(d) P(t) = 50(0.07)^t

I think the answer is A but confirmation would be great

3. Three is in the form of a picture because of square root signs and stuff that I can't do on a keyboard, lol. NOTE: I MADE A MISTAKE WITH THE IMAGE. The question should read a^4/5 NOT a^5/4 !!!!
http://img.photobucket.com/albums/v625/ ... 8/math.jpg

4. 3^120/3 is equal to
(a) 3^-120
(b) 3^119
(c) 1^120
(d) 3^117

5. Given 8(2)^x = 32, which of the following is false?
(a) 16^x = 32
(b) 2^x+3 = 32
(c) 2^x = 4
(d) x = log2 4 (2 is subscript)

6. It is in the form of a picture again.
http://img.photobucket.com/albums/v625/ ... /math2.jpg

7. Joey has been collecting antique toy cars as an investment. The value "V," in dollars, of a toy car with respect to it's age "t," in years, can be modelled using the function:

V = 2(3)^t/4

Which of the following is true?

(a) The car's initial value was $2 and it tripled value every 4 years.
(b) The car's initial value was $3 and it doubled value every 4 years.
(c) The car's initial value was $4 and it tripled value every 2 years.
(d) The car's initial value was $2 and it quadrulped value every 3 years.

......And a couple non-multiple choice.

Solve for X:

8. 9^2x-5 = 27^x+6

9. 125^x = 5

10. (2^x-4)^x = 32

11. 8^x+1 = (1/2)^x+5

Thank you so, so much. I know it's a lot!
P.S; I just read the stickied post and it says not to list a series of homework questions... My grandmother died last week and I missed the whole week and this is due tomorrow and I am very lost. I need a 70 in this course to get into the (non-math related) program I am looking to get into. I missed a test for her funeral so my chances of getting a 70% went down a lot so I need to do great on the rest of my assignments. And the assignment has about 50 questions, this isn't the whole thing!

 

[Deleted member 4993]

Thank you so, so much. I know it's a lot!
P.S; I just read the stickied post and it says not to list a series of homework questions... My grandmother died last week and I missed the whole week

But these topics were not done in one week. You have got to show us some work - so that we know where to begin to help you.

 

[beautifulconfusion]

I failed Math 12 and am re-taking it in night class while attending univerisity during the days and working weekdays and weekend. The reason I told you about the time I missed was because of how I missed an important test, thus dropping my mark lower because I can not re-do it since the class got their's back and the teacher will not make me a new, different test. I attended classes where this material was taught but I am not understanding it and the teacher doesn't help very much. (It is adult night class- not high school) I tried working them out and figured out 2, 6 and 7 but am having trouble with the rest.

 

[stapel]

I failed Math 12 and am re-taking it.... I missed an important test.... I can not re-do it.... I attended classes where this material was taught but I am not understanding it....

It is unfortunate that, having studied this material twice now, you still have almost no understanding of it. But there is a reason that these courses take months: they can't be covered in a quickie forum post or e-mail. So obviously we cannot teach you this material here.

Since taking this course two times has left you almost entirely confused, you may need to consider hiring a qualified local tutor, and setting aside a few hours a week for concentrated re-teaching. Mathematics is generally sequential, so start with the tutor right at the beginning of the course (the next time you attempt it). You might even want to spend some time with the tutor before the course begins; by working together through the first chapter of the textbook (which should be some sort of review), the tutor may be able to get you "up to speed" so you're able to understand the first few classroom lectures at least somewhat.

My best wishes to you!

Eliz.

 

[masters]

2. If a person earns an annual interest rate of 7% compounded annually on an investment of $50, which function shows how much money the investor has at time t, in years?
(a) P(t) = 50(1.07)^t
(b) P(t) = 50(1.7)^t
(c) P(t) = (1.07)^t/50
(d) P(t) = 50(0.07)^t

I think the answer is A but confirmation would be great You would be correct!

 

[jonboy]

though we can't teach here, i'll explain some of these to try to help.

5. Given 8(2)^x = 32, which of the following is false?
(a) 16^x = 32
(b) 2^x+3 = 32
(c) 2^x = 4
(d) x = log2 4 (2 is subscript)

We have: 8(2)^x = 32

Well, since 8 times 4 is 32, then 2^x must be 4. And so x must equal 2.

So, fill in 2 for x on answer a, we get 16^(2) = 32. Not true, as 256 does not equal 32.

So A is the answer for 5. I think you can follow that logic.

9. 125^x = 5

125 is the same as 5 x 5 x 5 or \(\displaystyle 5^3\).

So re-write this as: \(\displaystyle 5^{3x} = 5\)

If the bases are the same, then you can set the exponents equal to each other.

So solve \(\displaystyle 3x = 1 \Rightarrow \boxed{x = \frac{1}{3}}\)

One 8, 10, 11, it's not specific as to what's the exponent. Put all that's an exponent in parenthesis with the ^.