Answer:
Step-by-step explanation:
Pythagorean theorum: 5^2 +s^2 = 15^2 so 25 + s^2 =225
s^2 =200 so s = square root of 200 which is 10 times the square root of 2. So the first answer is right
Answer:
7am
Step-by-step explanation:
ANSWER
65
EXPLANATION
This will form a sequence with first term:

with constant difference d=6 and last term

The last term is a term in the sequence, therefore;



Simplify the LHS

Divide both sides by 6.


Therefore

Hence there are 65 multiples of 6.