The exponential function f(x)=100(0.7)^x models Exponential (Growth/Decay) and the rate of (Growth/Decay) is (7%/30%/70%/130%).

Exponential Functions, eh?

Step-by-step explanation:

First we have to know if it is growth or decay!

(HINT: look inside the parentheses, there's that value I am talking about)

If that value(forgot the variable that was supposed to represent it) is below 1 and above 0, it is decay. If it's greater than 1, it's growth, as the value increases with each larger x-value.

So, It's 0.7, so it's Decay.

The rate of decay depends on the value again. The rate of decay is:

So, using substitution:

And because percents, we have to multiply it by 100 to get our percentage.

(The percentage sign would not come up)

The Rate of Decay is 30%

Hope this Helps!

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

17.08

correct me if i am wrong.