Question

A Galapagos cactus finch population increases by half every decade. The number of finches is modeled by the expression 45 • 1.5d, where d is the number of decades after the population was measured. Evaluate the expression to find the number of finches for d = –2. (1 point) Responses 20 20 68 68 900 900 4,556

Answer 1

Are you sure

Answer 2

To find the number of finches for d = -2, we substitute -2 into the expression 45 • 1.5d.

45 • 1.5(-2) = 45 • 1.5(-2) = 45 • 1/1.5 = 45 • -1/(1.5/1.5) = 45 • -2/1.5 = -90/1.5 = -60.

The number of finches for d = -2 is -60.

None of the given responses (20, 68, 900, 4,556) matches the correct answer of -60.

Answer 3

Apologies for the confusion.

To evaluate the expression 45 • 1.5d for d = -2:

45 • 1.5(-2) = 45 • 1.5(-2) = 45 • 1/1.5 = 45 • -2/1.5 = -90/1.5 = -60.

The number of finches for d = -2 is -60.