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3 years ago

10

When a tree was planted, it was 3 ft tall. Since then, it has been growing at a rate of 0.25 ft per year. How long will it take

for the tree to grow to be 15 ft yall?

1 answer:

anzhelika [568]3 years ago

6 0

I think it will be 60 years. 15 divided by 0.25 is 60.

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Write an equation for the nth term of the arithmetic sequence. Then find a40.

Olegator [25]

Answer:

The nth term is: $a_n = \frac{1}{4} + \frac{1}{4}(n-1)$

a40 = 10

Step-by-step explanation:

Arithmetic sequence:

In an arithmetic sequence, the difference between consecutive terms is always the same, and this difference is called common difference.

The nth term of a sequence is given by:

$a_n = a_1 + (n-1)d$

In which $a_1$ is the first term and d is the common difference.

1/4,1/2

This means that:

$d = \frac{1}{2} - \frac{1}{4} = \frac{2}{4} - \frac{1}{4} = \frac{1}{4}$

1/4

This means that $a_1 = \frac{1}{4}$

The nth term is:

$a_n = a_1 + (n-1)d$

$a_n = \frac{1}{4} + \frac{1}{4}(n-1)$

Then find a40.

$a_{40} = \frac{1}{4} + \frac{1}{4}(40-1) = \frac{1}{4} + \frac{39}{4} = \frac{40}{4} = 10$

So

a40 = 10

8 0

2 years ago

Plz plz plz HELP!

ch4aika [34]

Answer:

y=11x

Step-by-step explanation:

ΔX = 2 – 1 = 1

ΔY = 22 – 11 = 11

5 0

2 years ago

One circle has a diameter of 6 inches. A larger circle has a diameter that is 4 times the diameter of the circle. what is the ra

harina [27]

Answer:

C, 1 : 16

Step-by-step explanation:

Small Circle

The radius is half of the diameter. 3 inches.

π×r²=A

We'll use 3.14 for pi.

3.14×9

28.26 in²

Bigger Circle

6×4= 24

So the diameter is 24. The radius is 12.

3.14×12²

3.14×144

452.16 in²

Let's divide.

452.16÷ 28.26

= 16

Therefore, the answer is C, 1 : 16.

Hope this helps, please mark brainliest if possible :)

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2 years ago

LEARN Denzel gives of his pretzel sticks to Jane and of his pretzel sticks to Hannah. He has 55 pretzel sticks left. How many pr

sweet-ann [11.9K]

Answer:

90 pretzel sticks.

Step-by-step explanation:

7 0

2 years ago

(WILL DO BRAINLIST)

Lynna [10]

You have a function $y= \dfrac{3}{2} \left(1+\sin \left(\dfrac{2t+1}{2}\cdot \pi\right) \right)$ .
Since the range of the function $y=\sin x$ is $[-1,1]$ you have that

$-1\le \sin \left(\dfrac{2t+1}{2}\cdot \pi\right)\le 1 \\ 0\le 1+\sin \left(\dfrac{2t+1}{2}\cdot \pi\right) \le 2 \\ 0\le \dfrac{3}{2} \left(1+\sin \left(\dfrac{2t+1}{2}\cdot \pi\right) \right)\le 3$ .
Answer: The range of given function is [0,3] and the correct choice is C.

6 0

2 years ago