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3 years ago

1 Bradley is building a table

Mathematics

1 answer:

Harman [31]3 years ago

3 0

Answer:

Step-by-step explanation: < 180

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Some researchers have conjectured that stem-pitting disease in peach-tree seedlings might be controlled with weed and soil treat

lorasvet [3.4K]

Answer:

A. 14.6 ± 7.00

Step-by-step explanation:

Formula for the confidence interval between the two mean is;

CI = (μ2 - μ1) ± z√[((s1)²/n1) + ((s2)²/n2)]

We are given;

μ1 = 94.5

μ2 = 109.1

s1 = 10

s2 = 9

n1 = 10

n2 = 10

The z-value at confidence interval of 90% is 1.645

Thus;

CI = (109.1 - 94.5) ± 1.645√[(10²/10) + (9²/10)]

CI = 14.6 ± 7.00

6 0

3 years ago

Find the standard form of the equation of the ellipse satisfying the following conditions. Major axis vertical with length 14;

Evgesh-ka [11]

Answer:

The answer to your question is below

Step-by-step explanation:

Data

Mayor axis vertical = 14

Minor axis = 10

Center = (-7, 3)

Formula

Mayor axis = 2a

Minor axis = 2b

$\frac{(x-h)^{2} }{b^{2} } + \frac{(y - k)^{2} }{a^{2} } = 1$

Process

2a = 14 2b = 10

a = 7 b = 5

h = -7 k = 3

Substitution

$\frac{(x+7)^{2} }{5^{2} } + \frac{(y - 3)^{2} }{7^{2} } = 1$

5 0

3 years ago

A pole that is 3.5m tall casts a shadow that is 1.47m long. At the same time, a nearby tower casts a shadow that is 42.75m long.

Stells [14]

Answer:

The height of the tower nearby the pole is 102 m.

Solution:

Given,

Height of the pole = 3.5 m

Length of the shadow of the pole = 1.47 m

Length of the shadow of the tower nearby = 42.75 m

Let us assume the height of the tower as x

$\frac{height of the pole}{length of the shadow of the pole}=\frac{height of the tower}{length of the shadow of the tower}$

$\frac{3.5}{1.47} = \frac{x}{42.75}$

On solving for x we get,

$x = \frac{3.5}{1.47}\times 42.75$

$x = 101.785 m$

On rounding off to the nearest meter we get,

x=102 m

$\therefore$ The height of the tower is 102 meter.

7 0

3 years ago

Carla and Marty have three straws. The straws have lengths 8 inches, 10 inches and 14 inches. They are going to use their straws

IgorLugansk [536]

Carla is correct because they will not all be exactly the same unless they choose to make them all be the same. Hope I could help! :D

6 0

3 years ago

One of the tables shows a proportional relationship.

beks73 [17]

Answer:

See attached

Step-by-step explanation:

The graph of a proportional linear relationship is a line that passes through the origin (0, 0).

From inspection of the given tables, the linear equations for each table of points is:

Table 1: y = x + 1
Table 2: y = x/2
Table 3: y = x + 2
Table 4: y = 2x + 1

The only equation for which y = 0 when x = 0 is y = x/2 → Table 2.

Given points from Table 2:

(2, 1)
(4, 2)
(6, 3)
(8, 4)

To graph the line, plot the given points and draw a line through them (see attached).

5 0

2 years ago