There are 13 left-handed and 21 right-handed spirals on the cacti in the photograph. what is special about these numbers?
a. the value of the 21st term of the fibonacci sequence is 13.
b. they are consecutive terms in the pyramidal sequence.
c. they are consecutive terms in the fibonacci sequence.
d. the value of the 21st term of the pyramidal sequence is 13.

C.They are consecutive terms in the Fibonacci sequence.

Step-by-step explanation:

The Fibonacci Sequence is the series of numbers: 0, 1, 1, 2, 3, 5, 8, 13, 21, 34, ...

Each number is the sum of the two numbers that come before it.

The square pyramidal numbers are: 1, 5, 14, 30, 55, 91, 140, 204, 285, 385, 506, 650, 819, ...

Therefore, we can see given numbers of cactus , 13 and 21 respectively are the consecutive terms of Fibonacci sequence.

Thus, Option C is the right answer.

x=17

step-by-step explanation:

solve 3x-24=x+10

then that makes it 2x=34 because you subtract an x from both sides to get rid of the one on the right, and then you add 24 to both sides to get rid of the 24 on the left

divide by both sides by 2 to get your answer so that you can get your answer

answer

false

explanation

these practices describe the manner the land use outcome is attained. land management methods implemented by corporations are a mandatory because they are a driver for better land use results economically, socially and environmentally. corporations are required to understand the connection between land use , and land management practices to support sustainable land use policies