Answer:
1st answer
Step-by-step explanation:
From pythagorus theorem.
Since hypotenuse

Answer:
So scientific notation would be 5 x 10 ^7, and standard would be 50,000,000
Step-by-step explanation:
The 7 means you move the decimal to the right 7 times, meaning you add 7 zeros.
Answer:
C.) 
Step-by-step explanation:
The area formula:

Insert the values:

Use the distributive property:

:Done