This quarter circle has a radius of 7 centimeters what is the area of this shape?

153.94

Step-by-step explanation:

I literally just typed in "how to find area of a circle with given radius" to refresh my memory lol. But then all I had to do was type in the radius and it gave me the 153.94

However, if you need the actual steps:

Use the formula: A = πr^2

A = π7^2

A = 49π

A = 153.938 which rounds to 153.94 :)

, 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

answer: 0

step-by-step explanation: the positive, like 5, + its opposite, like -5 would be 0

5+(-5)=0, or 5-5=0