How many terms are there in the sequence 1, 8, 28, 56, ..., 1 ?

9 terms

Step-by-step explanation:

Given:  

1, 8, 28, 56, ..., 1

Required

Determine the number of sequence

To determine the number of sequence, we need to understand how the sequence are generated

The sequence are generated using

Where n = 8 and r = 0,1....8

When r = 0

When r = 1

When r = 2

When r = 3

When r = 4

When r = 5

When r = 6

When r = 7

When r = 8

The full sequence is: 1,8,28,56,70,56,28,8,1

And the number of terms is 9

where's the diagrams?

let x be the money she spent so that she can earn the free t-shirt.

since, she already spent $112.49

⇒

also, as per the statement: jennifer must spend $250 or more in order to qualify for a free t-shirt at the store.

then,

we have an inequality i.,e

subtract 112.49 from both sides we get;

therefore, $137. 51 more money does jennifer need to spend so that she can earn the free t-shirt