Three brothers adam, paul, and jake are standing on a large carnival scale. the total weight for all three boys reads 180 pounds on the scale. the ratio of the weights between adam and jake is 2: 3. if jake weighs 60 pounds, how much does paul weigh?

Scott harris can invest $7,000 in a 1-year cd that earns interest at an annual rate of 4 percent compounded monthly. the amount per $1.00 is 1.040742. he can also invest $7,000 in a 1-year cd at annual rate of 4 percent compounded quarterly. the amount per $1.00 is 1.040604. what is the difference in the amount of interest earned for each investment? a) $0.96 b) $0.81 c) $0.87 d) $0.88

Suppose that sahil knows that 45 people with ages of 18 to 29 voted. without using a calculator, he quickly says then 135 people with ages of 30to 49 voted. is he correct? how might sohil have come up with his answer so quickly?

8litres of paint can cover 129.6 m². how much paint is required to paint an area of 243m²?