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Posted in Mathematics

A small business owner made $40,000 the first year he owned his store and made an additional 7% over the previous year in each subsequent year. Find how much he made during his fourth year of business. Find his total earnings during the first four years.

1st year= 40,000
2nd year= 40,000 + 2,800=42,800 (2,996)
3rd year= 42,800 + 2,996=45, 796 (3205.72)
4th year= 45,796 + 3205.72=49001.72

40,000 + 42,800 + 45,796 + 49,001.72= 177,597.73

I think this is what they are asking for??

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Question Help Find the LCD​ (least common​ denominator) of the set of fractions. Do not combine the​ fractions; only find the LCD. Lcd 9/25 and 28/45

9/25 and 28/45 are both rather large numbers as denominators, so you can expect your LCD to be a bit large as well. the way i find the LCD is by trial and error. i take the biggest of the denominators and multiply it by low numbers (1, 2, 3, etc.) until i find one that works for both.

45*1 = 45, which 25 doesn’t go into evenly
45*2 = 90, which when divided by 25, results in 3.6, aka not a whole number
45*3 = 135, which divided by 25 results in 5.4
45*4 = 180, which divided by 25 results in 7.2
45*5 = 225, which is promising because it ends with “25”, and results in 9

so your LCD, which is divisible by both 45 and 25, is 225.

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