A building in the shape of a square pyramid is covered with solar panels. This building has a slant height of 12 feet into base with side lengths of 15 feet. The solar panels cost $70 per square foot to install. How much does it cost to install enough solar panels to cover the entire surface of the building?

yes. we do proportions in probabilities.

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for