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3 years ago

A circle has an area of 144 cm2.Find the circumference

1 answer:

5 0

Circumference of Circle = 2πrArea of circle = πr²144 = 3.14 * r²r² = 144/3.14r² = 45.85r = √45.85r = 6.77 Circumference = 2πr = 2*3.14*6.77Circumference = 42.51 m²
So, your answer is 42.51 m²

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The price of gold is often reported per ounce. At the end of 2005, this price was $513. At the end of 2015, it was $1060. By wha

kondor19780726 [428]

Answer:

106.6 %.

Step-by-step explanation:

That would be (1060- 513) / 513) * 100

= 106.6 %.

7 0

3 years ago

The explicit rule for a sequence is an=5(−2)^n−1

Murrr4er [49]

Answer:

3) $a_n=-2a_{n-1}$ , $a_1=5$

Step-by-step explanation:

Given that the explicit rule for a sequence is $a_n=5(-2)^{n-1}$ .

Now we need to find about what is the recursive rule for the sequence and match with the given choices to find the correct choice.

1) $a_n=-2a_{n+1}$ , $a_1=5$

2) $a_n=-5a_{n+1}$ , $a_1=2$

3) $a_n=-2a_{n-1}$ , $a_1=5$

4) $a_n=-5a_{n-1}$ , $a_1=2$

Plug n=1 into given formula to get first term

$a_n=5(-2)^{n-1}$

$a_1=5(-2)^{1-1}=5(-2)^{0}=5(1)=5$

base of the exponent part is (-2) so that means we need to multiply -2 to the previous term to get nth term

Hence correct choice is: 3) $a_n=-2a_{n-1}$ , $a_1=5$

7 0

3 years ago

7. The value of y varies directly with x, and y = 8 when x = 2.<br> Find y when x = 10.

lesya692 [45]

Y= 40 explanation don’t want to just trust me it’s 40

4 0

3 years ago

How many buttons did Anne sew?<br> Rate: 8 buttons per minute Time: 7 minutes

olganol [36]

Answer:

42 buttons

Step-by-step explanation:

8 x 7 = 42

42 buttons

Hope that helped have a nice day

Can I have brainliest btw?

8 0

3 years ago

Read 2 more answers

Answers :

alexdok [17]

The correct answer is B

8 0

3 years ago