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3 years ago

Can’t figure this out!

Mathematics

2 answers:

koban [17]3 years ago

3 0

$b_n=b_1*q^{n-1}\\b_1=1, q=\frac{3}{1} =3\\b_n=1*3^{n-1}$

(b and t are the same)

P.S. Hello from Russia

Tamiku [17]3 years ago

3 0

It B answer
I am pretty sure

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Suppose 250 randomly selected people are surveyed to determine if they own a tablet. Of the 250 surveyed, 98 reported owning a t

SashulF [63]

Answer:

The true proportion for the population would be between 0.386 and 0,398 (0.392±0.06) in 95% confidence level.

Step-by-step explanation:

Confidence interval for true population proportion can be computed as p±ME where

p is the sample proportion ( $\frac{98}{250}=0.392$ )
ME is the margin of Error from the mean

and margin of error (ME) can be found using the formula

ME= $\frac{z*\sqrt{p*(1-p)}}{\sqrt{N} }$ where

z is the corresponding statistic in 95% confidence level (1.96)
p is the sample proportion ( $\frac{98}{250}=0.392$ )

N is the sample size (250)

Using the numbers

ME= $\frac{1.96*\sqrt{0.392*0.608}}{\sqrt{250} }$ ≈ 0.06

Then the true proportion for the population would be p±ME = 0.392±0.06 in 95% confidence level.

6 0

3 years ago

Find the surface area of the square pyramid, Show your work please : )

vova2212 [387]

Answer:

105in²

Step-by-step explanation:

Surface area is the total area of the faces.

The faces of pyramid consist of triangles and a square

The area of a square can easily be calculated by squaring the side length

the square of this pyramid has a side length of 5

area of square = 5²

5² = 25

the area of the square is 25in²

Now to find the area of the triangles

All we have to do is find the area of one triangle and multiply that buy 4 ( because there are four triangle)

the area of a triangle can be calculated using this formula :

$A=\frac{bh}{2}$ where b = base and h = height

The triangles have a base length of 5 in and a height of 8 in

$A=\frac{5*8}{2} \\5*8=40\\\frac{40}{2} =20\\A=20$

So the area of one triangle is 20 in²

Now we multiply 20 by 4 to find the area of all 4 triangles

20 * 4 = 80

So the total area of the triangles is 80in²

Finally we add the two areas together

Surface area = 80 + 25

80 + 25 = 105

Hence, the surface area is 105in²

4 0

3 years ago

Read 2 more answers

Find the value of x so that the function has the given value.<br> 9(x) = x-9; g(x) = 3

True [87]

Answer:

-15

Step-by-step explanation:

5 0

3 years ago

Find the radius, and the approximate circumference and area of the circle below. (Use 3 for \pi)

Marina CMI [18]

Answer:

Circ=37.704, Area= 112.112

Step-by-step explanation:

Circumference= pi *Diameter

Taking pi=3.142, Diameter=12

Circ=3.142*12=37.704

Area= pi * r^2

Area= 3.142*6*6=112.112

4 0

3 years ago

you toss a ball that travels on the path y= -0.1x^2 + 2x+4 where x and y are measured in meters. Sketch the path of the ball. Ho

Y_Kistochka [10]

Answer:

The ball goes 14 meters high

Step-by-step explanation:

Given the function

y= -0.1x^2 + 2x + 4

In the figure attached, the function is shown.

The maximum height is equivalent to the vertex of the function, which is obtained as follows:

Xv = -b/(2a) = -2/(2*-0.1) = 10

Yv = -0.1Xv^2 + 2Xv + 4

Yv = -0.1(10)^2 + 2(10) + 4 = 14

8 0

4 years ago