Julie decided to grow a plant from a seed. she measured the height of her plant each day for 30 days. after julie watched and measured her plant for 30 days, she determined the height of the plant, in centimeters, is equal to the function f(t), where f(t)=0.4t, and t is the number of days that have passed since the seed was planted. enter the value of f(t) at f(10).