Add spent 8.5% on his savings on lunch which cost $5.25 how much did he have in savings before lunch

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

What is the frequency of the sinusoidal graph?

Varies inversely with x. if y=8.5 when x=-1 find x when y=-1