Determine whether the given value is a statistic or a parameter.
a homeowner measured the voltage supplied to his home on all 7 days of a given week, and the average (mean) value is 120.7 volts.
choose the correct answer below.
a. the given value is a parameter for the week because the data collected represent a population
b. the given value is a statistic for the week because the data collected represent a population
c. the given value is a statistic for the week because the data collected represent a sample
d. the given value is a parameter for the week because the data collected represent a sample

Ahigh-altitude spherical weather balloon expands as it rises, due to the drop in atmospheric pressure. suppose that the radius r increases at the rate of 0.02 inches per second, and that r = 36 inches at time t = 0. determine the equation that models the volume v of the balloon at time t, and find the volume when t = 360 seconds. v(t) = 4π(0.02t)2; 651.44 in3 v(t) = 4π(36 + 0.02t)2; 1,694,397.14 in3 v(t) = four pi times the product of zero point zero two and t to the third power divided by three.; 4,690.37 in3 v(t) = four pi times the quantity of thirty six plus zero point zero two t to the third power divided by three.; 337,706.83 in3