Evaluate the given integral by making an appropriate change of variables. 3 x − 4y 3x − y dA, R where R is the parallelogram enclosed by the lines x − 4y = 0, x − 4y = 1, 3x − y = 3, and 3x − y = 10

Scale factor of 2 is used to enlarge a figure as shown below the area of is 18 in.²

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

The? half-life of a radioactive substance is 20 years. if you start with some amount of this? substance, what fraction will remain in 120 ? years