Is 51.6213 rational or irational

Find |−5|. a. −5 b. 5 c. one-fifth d. –one-fifth !

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

Valentina is subtracting from . she finds the lcd to be 15y2. what is valentina's next step?