Help ASAP answer all 4 questions for 15 points and a . ( show your work)

1)

There are 68,100 (1000’s- Thousands ) in 68,100,000 having moved the decimal left 3 points

2)

68,100,000÷15=4,540,000

3)

68,100,000÷9= 7,566,666

4)

7,566,666+ 4,540,000+68,100= 3.435 so the population was 3.4 million or 34 million

hope this helps

38.5

step-by-step explanation:

lets say, first number = r

second number = 3r+7

total = 49

(r)+(3r+7)= 49

4r+7 = 49

4r = 42

r = 42/4

r= 10.5

3r+7 = 3(10.5)+7 = 38.5

hope this