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kolbaska11 [484]
3 years ago
14

You invest $2000 in an account at 4.5% per year simple interest. How much will you have in the account at the beginning of the 8

th year? Round your answer to the nearest whole dollar. A. $2560 B. $2640 C. $2720 D. $2630
Mathematics
2 answers:
sashaice [31]3 years ago
8 0

Answer:

D. $2630

Step-by-step explanation:

Given,

The principal amount, P = $ 2000,

Annual rate of interest, r = 4.5 % ,

Thus, the interest for 7 years,

I=\frac{P\times r\times 7}{100}

=\frac{2000\times 4.5\times 7}{100}

=\frac{63000}{100}

=630

Hence, the amount after 7 years or at the beginning of the 8th year is,

A=P+I=2000+630=\$ 2630

Option 'D' is correct.

sergejj [24]3 years ago
5 0

Problem

You deposit $2000 into a bank account paying 4.5% simple interest per year. You left the money in for 8 years. How much interest do you get at the end of those 8 years?

Result

The interest is $720.

Then you add the money you invested to your interest so your answer would be  ' C ',

I think I'm not that great with math but I really hope I helped you .

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For the funtion f(x)= (x+7)^5, Find f^-1 (x)
quester [9]

Answer:

The inverse of function f(x)= (x+7)^5 is \mathbf{f^{-1} (x)=\sqrt[5]{x}+7}

Option A is correct option.

Step-by-step explanation:

For the function f(x)= (x+7)^5, Find f^{-1} (x)

For finding inverse of x,

First let:

y=(x+7)^5

Now replace x with y and y with x

x=(y+7)^5

Now, solve for y

Taking 5th square root on both sides

\sqrt[5]{x}=\sqrt[5]{(y+7)^5}\\\sqrt[5]{x}=y+7\\=> y+7=\sqrt[5]{x}\\y=\sqrt[5]{x}-7

Now, replace y with f^{-1} (x)

f^{-1} (x)=\sqrt[5]{x}+7

So, the inverse of function f(x)= (x+7)^5 is \mathbf{f^{-1} (x)=\sqrt[5]{x}+7}

Option A is correct option.

6 0
3 years ago
1.Solve the inequality (x-2)(x+1) ≥ 0 .
scoray [572]

Answer:

#1: inequality form: x ≤ –1 or x ≥ 2

interval notion: ( -∞,-1] U [2,∞)

#2: false/no solution

#3: A) point form: (3,9)(-1,1)

equation form: x= 3,y=9 and x= -1,y=1

B)point form: (1,7)(7,1)

equation form: x=1,y=7 and x=7,y=1

Step-by-step explanation:

#1: solve for x by simplifying both sides of the inequality, then isolating the variable.

#2: N/A

#3: solve for the first variable in one of the equations, then substitute the results into the other question.

5 0
3 years ago
Which expression gives the distance between the points (5, 1) and (9,-6)?
8_murik_8 [283]

9514 1404 393

Answer:

  C.  √((5-9)² +(1+6)²)

Step-by-step explanation:

The distance formula can be written ...

  d = √((x1 -x2)² +(y1 -y2)²)

Filling in the given point coordinates, this becomes ...

  d = √((5 -9)² +(1 -(-6))²)

Simplifying the signs, this becomes ...

  d = √((5 -9)² +(1 +6)²) . . . . . matches choice C

8 0
2 years ago
Margo borrows $800 agreeing to pay it back with 5% annual interest after 16 months. How much interest will she pay?
Andru [333]
She will pay $640 because....

800(.05)= 40

40x16= 640

4 0
3 years ago
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