~~i raised the points and will give brainliest its also multiple choice~~
which describes the type of sequence in 99, 89.9, 78.8, 68.7, . . . ?
a) neither geometric nor arithmetic
b) geometric
c) arithmetic
d) both arithmetic and geometric
( tell me why you picked your answer)

Option 'a' is correct.

Step-by-step explanation:

Since we have given that

99, 89.9, 78.8, 68.7, . . . . .

Here,

But we can see that there is minor difference between the consecutive terms:

So, we will go for common difference whether it is same or not.

Their difference are not common.

So, It is neither geometric nor arithmetic.

Hence, Option 'a' is correct.

3rd box is the answer

step-by-step explanation:

square pyramid

step-by-step explanation:

square prism looks like nothing like that

triangular prism has a rectangular base instead of a square base

tetrahedron has a triangular base