The data set represents a progression of hourly temperature measurements. Use a graphing calculator to determine the
quadratic regression equation for this data set
0 1 2 3 4 5
y 20 16 10 0
-20
X
a
y = 0.795x2 + 3.796x+ 20.180
b. y=-0.7957? - 3.761x + 20.180
C. y = -0.8757° - 3.596x + 20.179
d y = -0.7957? - 3.796x + 20.180

Evaluate the expression for the given value of the variable 2×(c2-5) for c=4

Monitors manufactured by tsi electronics have life spans that have a normal distribution with a standard deviation of 1800 hours and a mean life span of 20,000 hours. if a monitor is selected at random, find the probability that the life span of the monitor will be more than 17,659 hours. round your answer to four decimal places.

Breana is selling tickets to a choral performance. on the first day of ticket sales , she sold 3 senior citizen tickets and 1 child ticket for a total of $38. breana took in $52 on the second day by selling 3 senior citizen tickets and 2 child tickets. what is the price of a senior citizen ticket?