Need help asap please

Astudent was asked to find the square of 7x+3. the student quickly wrote (7x+3)^3= 49x^2+9. identify the student's error and provide the correct answer.

Daniel buys one bond each with a par value of $1,000 from grath oil, ombor medical supplies, and dwyn horticulture. grath oil bonds are selling at 120.514, ombor medical supplies bonds are selling at 90.773, and dwyn horticulture bonds are selling at 101.180. what is the total face value of daniel's bonds?

Ahummingbird lives in a nest that is 15 feet high in a tree.the hummingbird flies 17 feet to get from its nest to a flower on the ground.how far is the flower from the base of the tree?