Answer:
D. 15x10^20
Step-by-step explanation:
The rule for scientific notation is that the coefficient has to be between 1 and less than 10. This means there is only one digit in front of the decimal. 15x10^20 should be written as 1.5x10^21 to follow the rule.
Answer:
not sure
Step-by-step explanation:
Wrong person I pay someone to do my math for me :)
The side of the square is 4 cm since 4x4= 16