Is there a way to remember that a closed circle on a graph is less than or equal to/ greater than or equal to and an open circle on a graph is just less than or equal to?

Complete the truth table a. t, f, f, t b. t f f f c. f t f t d f t f t

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

Solve: 3x+y=6 4x-2y=18 show all work !