Find f(-2)
f(x)=2x^2 - 3x+6

a. 4
b. 8
c. 10
d. 20

Step-by-step explanation:

If (x+2) = 0; therefore, x = -2 .hence

f(-2) = 2x² - 3x + 6; 2(-2)² - 3(-2) +6

2(4) +6 +6; 8 + 12, =20. Therefore D is the correct answer.

54 km / hours

step-by-step explanation:

we need to convert seconds to hours

60 seconds = 1 minutes

60 minutes = 1hour

15 m         60 second   60 minutes

  * *         = 54000 meters/ hour

second     1 minute             1 hour

now we need to convert meters to km

1000 m = 1 km

54000 m       1 km

*   = 54 km / hours

hour               1000m

whole numbers.

step-by-step explanation:

we are given the average monthly rainfall (in millimeters) model r(m) for the years 1900-2009 as a function of the month number m.

as we can see m is taken for the number of months for years 1900-2009.

we know that number of months can't be a negative number or decimal number or a fraction.

so, the number of months could be only positive whole numbers.

therefore, whole numbers is more appropriate for the domain of r.