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3 years ago

Find the circumference of a circle with a radius of 2.4 m

Mathematics

1 answer:

Hatshy [7]3 years ago

8 0

Answer:

here,

circumference of circle (c)=2πr

=2×22÷7×2.4

15.0857143.

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What is 59 x3 please I need help

GREYUIT [131]

59*3 = 177 (Hope this helps!)

3 0

3 years ago

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Consider the following sequence of numbers 3, -9, 27, -81, ….

lesya [120]

<u>QUESTION 1</u>

The given sequence is $3,-9,27,-81,...$ .

The first term of the sequence is $a_1=3$

The second term is $a_2=-9$

The common ratio can be found using any two consecutive terms of the sequence.

Thus, the common ratio is given by $r=\frac{a_n}{a_{n-1}}$ .

This implies that,

$r=\frac{-9}{3}$

This simplifies to,

$r=-3$

The correct answer is C

<u>QUESTION 2</u>

The sum of the first n terms of a geometric sequence is given by;

$S_n=\frac{a_1(r^n-1)}{r-1}$ .

Since we are looking for the first five terms, we substitute $n=5$ , $a_1=3$ and $r=-3$ into the formula to obtain,

$S_5=\frac{3((-3)^5-1)}{-3-1}$

This will evaluate to give us;

$S_5=\frac{3(-243-1)}{-3-1}$

$S_5=\frac{3(-244)}{-4}$

$\Rightarrow S_5=3\times 61$

$\Rightarrow S_5=183$

The correct answer is A

8 0

4 years ago

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Can someone help me with b?? please

Katena32 [7]

Answer:

i think the answer might be 35 or 15

Step-by-step explanation:

5 0

4 years ago

Please help... I'm stuck on number 44 and I can't remember how to do it

Leona [35]

3(x+4)=9
3x+12=9
3x=-3
x=-1

Hope this helps :D

3 0

4 years ago

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If (x+2) is a factor of x^3-6x^2+kx+10, k=

Alja [10]

If a binomial $(x-a)$ is a factor of a polynomial, then $a$ is a root of this polynomial.

$(x+2)=(x-(-2)) \Rightarrow a=-2\\\\
(-2)^3-6\cdot(-2)^2+k\cdot(-2)+10=0\\
-8-24-2k+10=0\\
-2k=22\\\
\boxed{k=-11}
$

3 0

3 years ago