Hi can someone help me solve this problem. I’m seriously stuck.(thank you for your time)

3.3 feet

Step-by-step explanation:

Since this is a 90 degree triangle, we can use trigonometry to solve the missing length. The cosine of an angle is equal to the adjacent length over the hypotenuse.

Solving,

Rounding to the nearest tenth of a foot, 3.3 feet.

stethere all not eveanp-by-step explanation:

, 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