The measure of b is _.

Step-by-step explanation:

Pythagorean Theorem:

where a and b = legs and c = hypotenuse

we are given a leg and the hypotenuse so we plug in what we have into the formula

now we solve for b

step 1 subtract 20^2 from each side

finally we want to get rid of the exponent on the b

to do so we take the square root of each side

we're left with b = 21

Note: They Pythagorean theorem only works with right triangles

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.