The probe dropped 11 feet per minute, therefore, it dropped 11 feet in the first minute
Answer:
First evening, 21 calls. Second evening, 26 calls. Third evening, 84 calls.
Steps:
T = 4F
S = F + 5
131 = F + S + T
Substitute in the S and T equations;
131 = F + F + 5 + 4F
126 = 6F
F = 21
Then substitute F into both T and S equations;
T = 4 * 21
T = 84
S = 21 + 5
S = 26
