Heather went to a level field to fly a kite. She let out all 550 feet of the string and tied it to a stake. Then, she walked out on the field until she was directly under the kite, which was 500 feet from the stake. How high was the kite from the ground? (Round to the nearest foot)

Anyone know? will mark brainliest if correct!

Write the expression 7x^3-28xy^2 as the product of 3 factors

Graph the line that represents a proportional relationship between d and t with the property that an increase of 33 units in t corresponds to an increase of 44 units in d. what is the unit rate of change of dd with respect to t? (that is, a change of 11 unit in t will correspond to a change of how many units in d? )