Answer:
C
Step-by-step explanation:
tan45° = 
= 
= 1
X + 2 < -4
x < -4 -2
•x < -6
The product will have 9 digits after decimals . This is because the number of decimal points are added in multiplication.
For eg. 2.5×2.5=6.25 , 0.5×0.5=0.25 .
The answer to your question is 'The Changs paid the correct amount for their purchases'. I apologize for being late, but this answer may help others later.
For this question, there could be several answers. One example is 21. The second digit, 1, doubled is the ones digit, 2. And if you double the whole number, 21, it is less than 50.
