The standard form of 3×1+2×1/1000 is

Can someone me with this problem . show your work .

Present age of man is 45 years, 5 years back his age was 4 times age of his son what is present age of his son?

The oates family went out for dinner the price of the meal was $33.95 the sales tax was 7.25% of the price of the meal . the tip was 15% of the meal and the sales tax . how much money did the oates family pay for the meal, including tax and tip