Ky buys three tshirts originally priced at 49.96the stores discount applys 7.1 tax

Idon’t understand this.. will someone ? will mark brainliest along with 20 points.

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

Adele is five years older than timothy. in three years, timothy will be 2/3 of adele’s age. what is adele‘s current age?