4. a) How many digits are there to the right of the decimal point if you
write this number in standard form?
How do you know?
5 x 10 power 4 + 6 x 10power-7 + 5 x 10power-9 +
9×10power-11 + 4 x 10power-13
b) Could you write the number using
20 digits after the decimal point?
Explain your thinking
c) Is the number greater than or less
than 5 x 10power4? How do you know?​