Answer:
The answer for the missing side length is 16
Step-by-step explanation:
You have to use Pythagorean's Theorem 
is the hypotenuse, which is 20 in this case
is the bottom, which is 12
and you have to solve for 
So




This cancels out the exponent

That's the missing side length
Answer:
9.424777960769
Step-by-step explanation:
Answer: £ 214
Step-by-step explanation:
Pay for first 15 hours = 8 * 15 = £ 120
Pay for remaining extra hours is the remaining days of Friday which is 3 hours. So,
Pay = 10 * 3
Pay = £ 30.
Finally, find pay for Saturday
Pay = 4 * ( 2 * normal rate )
Pay = 4 * ( 2 * 8 )
Pay = £ 64
Total pay = 120 + 30 + 64
Total pay = £ 214.