Find the second derivative of r(x)=10x-0.001x^2

-0.002.

Step-by-step explanation:

The first derivative r'(x) = 10 - 2*0.001x^(2-1)

= 10 - 0.002x

The second derivative r"(x)

= -0.002.

15% chance.

step-by-step explanation:

3/10 times, the 5 year old will get a tablet. 5/10 times, the 13 yer old will get a tablet. multiply both fractions to get 15/100 times, both would have a tablet.