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Oliga [24]
3 years ago
12

The radius of a circle is 4 inches. What is the circle's area? p=4 in Use 3.14 for T.

Mathematics
2 answers:
aivan3 [116]3 years ago
6 0

Answer:

50.27

Step-by-step explanation:

matrenka [14]3 years ago
5 0

Answer:

50.24

Step-by-step explanation:

r = 4 \\ \pi = 3.14 \\ area = \pi {r}^{2}

Input the values into the equation

3.14 \times  {4}^{2}  \\  = 3.14 \times 16  \\ = 50.24

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Find the sumofthe geometrical progression of five terms, of which the first term is 7 and the multiplier is 7.Verify that the su
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Answer:

The sum of first five term of GP is 19607.

Step-by-step explanation:

We are given the following in the question:

A geometric progression with 7 as the first term and 7 as the common ration.

a, ar, ar^2,...\\a  = 7\\r = 7

7, 7^2, 7^3, 7^4...

Sum of n terms in a geometric progression:

S_n = \displaystyle\frac{a(r^n - 1)}{(r-1)}

For sum of five terms, we put n= 5, a = 7, r = 7

S_5 = \displaystyle\frac{7(7^5 - 1)}{(7-1)}\\\\S_5 = 19607

The sum of first five term of GP is 19607.

Verification:

2801\times 7 = 19607

Thus, the sum is equal to product of 2801 and 7.

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