I personally think it's C I hope it's right if not I'm Sorry
Answer:
6
Step-by-step explanation:
There 6 digits in this number so its of magnitude 6.
Answer:

Step-by-step explanation:
a reciprocal is a number that when multiplied by a given number gives 1 as product.
16 * x = 1
x = 1/16
9/10 * x = 1
x = 10/9
An irrational number is one with a fraction.
Okay well 7%, changes into 7/100=0.07 and there are 5 years and you have the beginning amount of 400. So 400×0.07=28. 28×5= 140. So add 140 to the be amount, 400+140=$540.
Answer is $540.