100 - 83.5 = 16.5 [three significant figure]
2.45 + 18.3 = 20.75 [four significant figures]
Option b is correct.
Answer:
16x square -9
Step-by-step explanation:
4x^2-9=
4x*4x-9
16x square -9
If 40% or .4 of her savings is $85 then we can write the equation .4s=$85 (s being the original amount in savings)
Divide both sides by .4 to get s= $212.50 as the original amount that she had
