The expression 64(1−0.1)ᵗ represents the number of hammers in a store t weeks after the hammers are delivered to the store. what does (1−0.1) represent?
a. the factor by which the number of hammers decreases 10 times each week
b. the factor by which the number of hammers decreases each week
c. the factor by which the number of hammers increases 10 times each week
d. the factor by which the number of hammers increases each week