30 POINTS! Find an explicit formula for the geometric sequence −1,−7,−49,−343
d(n)=

Step-by-step explanation:

Since the sequence above is a geometric sequence

For an nth term in a geometric sequence

where

a is the first term

r is the common ratio

n is the nth term

To find the common ratio divide the previous term by the next term

That's

So the common ratio / r = 7

the first term is - 1

Substitute the values into the above formula

We have the final answer as

Hope this helps you

80π/3 or about 83.775

step-by-step explanation:

since a cone is 1/3 of a cylinder, we need to find the base's area. since area = πr^2, we get 16π. then, multiplying this by 5, we get 80π. dividing by 3, since the cone's volume is 1/3 of that of a cylinder's, we get 80π/3.

hope this !