Anewborn child receives a $9,000 gift toward a college education from her grandparents. how much will the $9,000 be worth in 18 years if it is invested at 7.6% compounded quarterly? round to the nearest cent.

If f(x)=3 over x+2 - square root x-3 then f(7)=

The perimeter of ? cde is 55 cm. a rhombus dmfn is inscribed in this triangle so that vertices m, f, and n lie on the sides cd , ce , and de respectively. find cd and de if cf=8 cm and ef=12 cm. the answer is not cd=20 and de=15. i have tried that one, it does not work.

Can someone plz me with 11,12,13 plz show work