An ice cream cone measures 2 in. across the opening of the cone. Two hemisphere-shaped scoops of ice cream, which have diameters
of 2 in., are placed on top of the cone. As the ice cream melts, it
begins to fill the ice cream cone. How deep must the ice cream
cone be so that the melted ice cream will fill the cone exactly to the
top without overflowing?

Arianna is buying plants for her garden. she buys 15 flowering plants for $96. pink flowering plants sell for $8, and purple flowering plants sell for $5. how many pink flowering plants did arianna buy? i figured out the answer! the answer is 7. 8x +5y = 96 plug in 7 for x 8 (7) + 5y = 96 56 + 5y = 96 subtract 56 from both sides 5y/y = 40/5 y = 8 she bought 7 pink and 8 purple plants

Aman is 6 feet 3 inches tall. the top of his shadow touches a fire hydrant that is 13 feet 6 inches away. what is the angle of elevation from the base of the fire hydrant to the top of the man's head?

Given the expression (7 ? 4i) ? (2 + 6i), perform the indicated operation and write the answer in the form a + bi.