Answer:
9
Step-by-step explanation:
it will take approximately (72 / 8) = 9 years to double the invested money.
Convert 1450 feet to inches = 1740 inches
Tower = 24 inches
24/1740 = 2/145 .....This is the ratio of the model to the tower in inches.
Step-by-step explanation:
8(5g+3)=0
40g+24=0
40g=0-24
40g=-24
divide both sides by 40
therefore, the answer is -0.6

Sample 3: 6 boys; 7 girls