All categories

3 years ago

Can someone please help with NUMBER 7?!! It’s my last one I will mark brainliest to the best answer

Mathematics

1 answer:

Nikolay [14]3 years ago

7 0

Answer:

1, 3, 9, 27

Step-by-step explanation:

$a_n = 3^{n - 1}$

You need the first 4 terms, so let n = 1, and evaluate the expression. Then do the same for n = 2, n = 3, and finally n = 4.

n = 1

$a_1 = 3^{1 - 1} = 3^0 = 1$

n = 2

$a_2 = 3^{2 - 1} = 3^1 = 3$

n = 3

$a_3 = 3^{3 - 1} = 3^2 = 9$

n = 4

$a_4 = 3^{4 - 1} = 3^3 = 27$

You might be interested in

A survey found that in a sample of 75 families, 26 owned dogs. A survey done 15 years ago found that in a sample of 60 families,

statuscvo [17]

The difference in the proportions of both surveys goes from a maximum of 12.57% to a minimum of 4.76%.

Given that a survey found that in a sample of 75 families, 26 owned dogs, while a survey done 15 years ago found that in a sample of 60 families, 26 owned dogs, to find the 95% confidence intervals of the true difference in the proportions, the following calculation must be performed:

75 = 100
26 = X
26 x 100/75 = X
34.66 = X
34.66 x 0.95 = 32.93
34.66 x 1.05 = 36.40
60 = 100
26 = X
26 x 100/60 = X
43.33 = X
43.33 x 0.95 = 41.16
43.33 x 1.05 = 45.50
45.50 - 32.93 = 12.57
41.16 - 36.40 = 4.76

Therefore, the difference in the proportions of both surveys goes from a maximum of 12.57% to a minimum of 4.76%.

Learn more about maths in brainly.com/question/25989509

8 0

2 years ago

Eva invests $6400 in a new savings account which earns 3.4 % annual interest, compounded continuously. What

cupoosta [38]

Answer:

$7821.74

Step-by-step explanation:

Eva invests $6400 in a new savings account which earns 3.4% annual interest, compounded continuously.

We have to find the value of her investment after 6 years,

Now, using the formula for the compound interest we can get the value of her investment.

So, it will be $V = 6400 (1 + \frac{3.4}{100} )^{6} = 7821.74$ Dollars (Approximate)

{Rounded to the nearest cent} (Answer)

7 0

3 years ago

1.Which numbers below could be classified as integers? 2.Which number belongs in the shaded portion of the diagram below?

BigorU [14]

Answer:

1). Option (3)

2). Option (D)

Step-by-step explanation:

1). Integers are the numbers which are whole numbers with negative or positive notations.

Integers can't be a fraction or a number with decimal.

Out of the numbers given,

-18 and 4 will be the integers

Option (3) is the correct answer.

2). Shaded portion of the diagram represents the rational numbers excluding integers,

By the definition of the rational numbers, any number which can be written as a fraction is a rational number.

Rational numbers → All numbers given are the rational numbers

Integers → $\frac{16}{4}=4, -\frac{30}{5}=6, -\frac{32}{8}=-4$

Therefore, only one number $\frac{30}{9}$ will lie in the shaded region.

Option (D) will be the answer.

4 0

4 years ago

Alex

Slope(m) = -2 hope this helps

8 0

3 years ago

I need help pleaseeeeee what kind of angles are these?... numbers 2,6,7

KiRa [710]

Answer:

2: Obtuse

6: straight

7: acute

Step-by-step explanation:

acute angle-an angle between 0 and 90 degrees.

right angle-an 90 degree angle.

obtuse angle-an angle between 90 and 180 degrees.

straight angle-a 180 degree angle.

Or,at least i think

3 0

3 years ago

Read 2 more answers