3 5 of a number is 21. Find the number.

Tina wants to save money for school. Tina invests $400 in an account that pays an interest rate of 7.5%.

Over [174]

Here's the given:
P=$400
i=7.5%
A=$8500

The formula used for this problem is:
A = P(1+i)^t

Manipulating the equation to arrive at t, we have:
t = ln(A/P) / ln(1+i)

Plugging in values:
t = ln($8500/$400) / ln(1+0.075)
t = 42.26 years

7 0

3 years ago

I need help with number 10

Licemer1 [7]

The answer to the question is 2b+3

3 0

4 years ago

How do find the median and range..? give examples!

swat32

Answer:

Count how many numbers you have. If you have an odd number, divide by 2 and round up to get the position of the median number. If you have an even number, divide by 2. Go to the number in that position and average it with the number in the next higher position to get the median.

The range is calculated by subtracting the lowest value from the highest value.
Step-by-step explanation:

hope this helped!

7 0

3 years ago

Read 2 more answers

Please explain how to get the answer

meriva

Q must be positive in F.

F. r squared will be positive, because any number times itself is positive, and to get a positive number for the answer, the two numbers you multiply need to be the same sign. If r squared is positive, q must be too.

G. q does not have to be positive. If r is a negative number, then q can be negative. Say q=-2 and r=-3. -2-(-3) changes to -2+3, which equals 1.

H. Again, q can be negative if r is negative (two negative numbers multiplied together equals a positive answer.

J. q can be negative because even a negative number turns positive when squared.

Hope this helped you. :)

8 0

4 years ago

PLEASE HELP!!! Equations Sort and Equivalent Expressions

Alex73 [517]

Answer:

Step-by-step explanation:

Math Matching games:

5(5x + 2)

5(5x) + 5(2)

25x + 10 <== answer

2(x + 4)

2(x) + 2(4)

2x + 8 <== answer

3(4x - 9)

3(4x) - 3(9)

12x - 27 <== answer

7(2x + 3)

7(2x) + 7(3)

14x + 21 <== answer

4(3x - 5)

4(3x) - 4(5)

12x - 20 <== answer

6(5x + 1)

6(5x) + 6(1)

30x + 6 <== answer

8(x - 5)

8(x) - 8(5)

8x - 40 <== answer

5(4x - 3)

5(4x) - 5(3)

20x - 15 <== answer

2(2x + 7)

2(2x) + 2(7)

4x + 14 <== answer

3(3x + 3)

3(3x) + 3(3)

9x + 9 <== answer

7(5x - 2)

7(5x) - 7(2)

35x - 14 <== answer

4(x - 8)

4(x) - 4(8)

4x - 32 <== answer

True or false Part 1:

A. 3x + 3 = 3(x + 1) <== true

B. 2x + 2x + 4 = 8x <== false

C. 3x + 3 = 2x + x + 3 <== true

D. 2x + 2x + 4 = 2(x + 1) <== false

E. 5x + 6 = 3x + 3x <== false

F. 3x + 3 = 3(x + 3) <== false

G. 2x + 2x + 4 = 4(x + 1) <== true

H. 4x + 3 = 3x + 4 <== false

I. 8 + 2x + 4x = 14 <== false

J. 4x + 4 = 3x + x + 2 + 2 <== true

K. 3x + 2x + 4 = 3x + 2(x + 2) <== true

L. 6x + 2x = 3x + 5x <== true

M. 8x = 8 + x <== false

N. 8x = x + x + x + 5x <== true

True or false Part 2:

I. 8 + 2x + 4x = 14 <== false

J. 4x + 4 = 3x + x + 2 + 2 <== true

K. 3x + 2x + 4 = 3x + 2(x + 2) <== true

L. 6x + 2x = 3x + 5x <== true

M. 8x = 8 + x <== false

N. 8x = x + x + x + 5x <== true

O. $x^2+3x=3x+x^2\ < ==\ true$

P. $2x^2+3=2+x^2+x^2+1\ < ==\ true$

Hope this helps!

4 0

2 years ago

35of a number is 21.Find the number.​

35of a number is 21.Find the number.