A telephone call arrived at a switchboard at random within a one-minute interval. The switch board was fully busy for 40 seconds into this one-minute period. What is the probability that the call arrived when the switchboard was not fully busy

Solve the following: 12(x^2–x–1)+13(x^2–x–1)=25(x^2–x–1) 364x–64x=300x

Why is partitioning a directed line segment into a ratio of 1: 3 not the same as finding the length of the directed line segment?

An architect builds a model of a park in the shape of a rectangle. the model is 40.64 centimeters long and 66.04 centimeters wide. one inch equals 2.54 centimeters. use the ratio table to find the ratio of the length to the sum of the length and width in inches and in simplest form. length 40.64 width 66.04 a. 8: 21 b. 13: 21 c. 21: 13 d. 21: 8