The equation ​yˆ=−0.37x2+6.15x+52.3​ approximates the average temperature in October in degrees Fahrenheit at an agricultural community x hours after 5 a. m. What is the best estimate for the average temperature in October at 9 a. m.?

64°F

67°F

71°F

78°F

55. i don’t no. but zhongshan

The surface area would be 576 because you multiply all the numbers then multiply that number by 6

Period is the time it takes for one “cycle” to complete. in the parent sine function, period is 2*pi since sin(0) = 0, sin(pi/2) = 1, sin(pi) = 0, sin(3pi/2) = -1, and sin(2pi) = 0. at that point, the sequence repeats itself. i’m not sure if your graph is similar to the sine function since you didn’t provide a picture, but you can find the period by looking at a graph.