Solve the problem.A person at the top of a 600 foot tall building drops a yellow ball. The height of the yellow ball is given by the equation  where h is measured in feet and t is the number of seconds since the yellow ball was dropped. A second person, in the same building but on a lower floor that is  from the ground, drops a white ball  after the yellow ball was dropped. The height of the white ball is given by the equation 

src="https://sciemce.com/media/4/ppg__tttt0518191235__f1q101g4.jpg" alt="" style="vertical-align: -4.0px;" /> where h is measured in feet and t is the number of seconds since the yellow ball was dropped. Find the time that the balls are the same distance above the ground and find this distance.

A. 3 seconds; 456 feet
B. 3.5 seconds; 404 feet
C. 4 seconds; 344 feet
D. 2.5 seconds; 500 feet

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Answer: B

Mathematics

Solve.The sum of a number and its reciprocal is -2. Find the number.

A. -1 B. 1 or -1 C. 2 D. 1

Solve the problem.A summer camp wants to hire counselors and aides to fill its staffing needs at minimum cost. The average monthly salary of a counselor is $2400 and the average monthly salary of an aide is $1100. The camp can accommodate up to 35 staff members and needs at least 20 to run properly. They must have at least 10 aides, and may have up to 3 aides for every 2 counselors. How many counselors and how many aides should the camp hire to minimize cost?

A. 19 counselors and 23 aides B. 13 counselors and 16 aides C. 8 counselors and 12 aides D. 13 counselors and 17 aides

Sketch the graph of the equation. ? ?

A.
B.
C.
D.

Solve the system.4x2 - 2y2 = 285x2 + 5y2 = 65

A. {(3, 2), (-3, 2), (3, -2), (-3, -2)} B. {(3, -2), (3, 2)} C. {(3, 2), (2, 3), (-3, -2), (-2, -3)} D. {(-3, -2), (-2, -3)}