**Answer:**

**40.5**

**Step-by-step explanation:**

what i do is I divided first by 10. because 100 is 10x10.

so 4050 divided by 10 is 405.

405 divided by 10 is 40.5

**Answer:**

Simplifies to 4k - 32

**Step-by-step explanation:**

To solve, translate the word problem into an equation:

"A number K" - k

"decreased by eight" - subtract 8 or k - 8

"the result is multiplied by eight" - multiply 8(k - 8)

"this product is then divided by two" - divide by 2 or 8(k - 8)/2.

8(k - 8) / 2 = 4(k - 8) = 4k - 32.

The simplified form is 4k - 32. To find a final numerical result, substitute any number for k and apply the equation.

**Answer:**

-2/3

**Step-by-step explanation:**

-1.5 - 0.5 / 2.5 - (-0.5)

= -2/3

**Answer:**

972 is the population of rabbits in the year 5

**Step-by-step explanation:**

is an increasing exponential function of base 3. The fact that its base is 3 means that the function triples when x increases one unit.

It is said that the population triples every year. Therefore x represents the number of years elapsed and f(x) represents the number of rabbits in year x

If f(x) represents the population of rabbits for the year x, then, f(5) represents the population of rabbits for x = 5, that is to say, after having passed 5 years.

So, 972 is the population of rabbits in the year x = 5

So he started at

**9:30 a.m.**

three hours and ten minutes later

9+3 is 12

30 + 10 is 40

**12:40 p.m. **

it took him 47 minutes to replace

so 12:40 plus 47 minutes is

**1:27 p.m. **

He then rode for another 56 minutes to finish the race

so 1:27 plus 56 minutes

**2:23 p.m.**

Hope this helps :)