2 years ago

Find the exact circumference of a circle with a diameter of 5 inches

1 answer:

6 0

The answer is 7.85
First, you divide the diameter by two to get the radius (2.5) and then you multiply by pi(3.14) to get 7.85

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the population of the town is decreasing by 12% each year if the current population of the town is 13500, what will be the popul

Anit [1.1K]

Do 13,500 times .012. Take that answer and multiply it by 10. From that answer, subtract it from 13,500. That would be your final answer.

6 0

2 years ago

Show that the sum of the reciprocals of three different positive integers is greater than 6 times the reciprocal of their produc

Montano1993 [528]

If a,b,c are the 3 positive integers
1/a +1/b +1/c > 6/abc
(bc+ac+ab)/abc >6/abc so
(bc+ac+ab)>6
The lowest positive integers that are different are 1,2,3 so the lowest value that (bc+ac+ab) could have is 1•2+2•3+1•3=2+6+3= 11 therefore
1/a +1/b +1/c > 6/abc is true

8 0

2 years ago

Number sentences for these 4?

Murrr4er [49]

A. 15-35=-20
b. -2+7=5
c. -10+14=4
d. 60-100=-40

6 0

3 years ago

Solve for f.<br><br> 8 = 2f + 2

tiny-mole [99]

Answer:

f = 3

Step-by-step explanation:

8 = 2f + 2

-2 -2

6 = 2f

/2 /2

3 = f

5 0

3 years ago

Steven wants to increase the number of books he reads per year. He currently reads 2 books a year. He wants to triple the number

Sladkaya [172]

Answer:

$B=2\times 3^n$

Step-by-step explanation:

<u>Exponential Growing </u>

Steven currently reads 2 books a year. He wants to triple the number of books read per year. The first year he should read

$2*3 = 6\ books$

By the second year, he should read

$2*3^2 = 18\ books$

By the third year, he should read

$2*3^3 = 54\ books$

We can clearly see there is a geometric progression of the number of books he should read for the year n. The general formula is, being B the number of books read at the year n

$\boxed{B=2\times 3^n}$

8 0

2 years ago