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Bad White [126]
3 years ago
11

A circle has a radius of 4.2 cm.

Mathematics
1 answer:
patriot [66]3 years ago
8 0

Step-by-step explanation:

r=4.2

cicumference of circle =2Πr=2×3.14×4.2=26.3

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Explain why a square must be a rectangle but a rectangle does not have to be a square
Sergio [31]

Answer:

A rectangle is any four sided shape that has four right angles; Therefore, since a square is a four sided shape that has four right angles and congruent (equal) sides, it always has to be a rectangle. However a rectangle does not always have congruent sides, so it is not necessarily a square.

7 0
3 years ago
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Find the sum of the finite geometric sequence
lions [1.4K]

Answer:

45

Step-by-step explanation:

Use the geometric sum formula for in infinite sum. 20 terms of this basic formula is close enough The 20th term is 8.6 * 10^-10 which means this goes out to a number with 9 zeros after the decimal and before the 8.

Put another way, the tenth number of this series is the only one affected.

When you use a spreadsheet, it seems to know that the answer is 3/2 as the solution to the sum.

Solution.

Sum = a / (1 - r)

a = 1

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sum =  3/2

Now you can worry about the 30.

30 * sum(1/3)^n = 30* 3/2 = 45

If there is something you want more information on, leave a note.

6 0
4 years ago
What is the range of the function y = 2e x-1
shtirl [24]
The range of y = ex is all numbers greater than 0, so since the function has been shifted up 1, the new range of the function is all numbers greater than 1. Since the argument of any log must be greater than 0, (x-1)/2 > 0. Thus x - 1 > 0, so x > 1
6 0
3 years ago
8.2x-3.5×=75.2 how do you work this problem
VARVARA [1.3K]
Heyo!

Solve the equation

8.2x - 3.5x = 75.2

Collect the terms

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x = 16
7 0
4 years ago
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Answer:9283022

Step-by-step explanation:

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4 0
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