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Mekhanik [1.2K]

3 years ago

10

What is 1a+1b I have no clue

1 answer:

aev [14]3 years ago

4 0

Answer:

a+b

Step-by-step explanation:

=1a+1b

=1(a+b)

=a+b

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A tree struck by lightning in a storm breaks and falls over to form a triangle with the ground. The tip of the tree makes a 36°

liraira [26]

Answer: approximately 49 feets

Step-by-step explanation:

The diagram of the tree is shown in the attached photo. The tree fell with its tip forming an angle of 36 degrees with the ground. It forms a right angle triangle,ABC. Angle C is gotten by subtracting the sum of angle A and angle B from 180(sum of angles in a triangle is 180 degrees).

To determine the height of the tree, we will apply trigonometric ratio

Tan # = opposite/ adjacent

Where # = 36 degrees

Opposite = x feets

Adjacent = 25 feets

Tan 36 = x/25

x = 25tan36

x = 25 × 0.7265

x = 18.1625

Height of the tree from the ground to the point where it broke = x = 18.1625 meters.

The entire height of the tree would be the the length of the fallen side of the tree, y + 18.1625m

To get y, we will use Pythagoras theorem

y^2 = 25^2 + 18.1625^2

y^2 = 625 + 329.88

y^2 = 954.88

y = √954.88 = 30.9 meters

Height of the tree before falling was

18.1625+30.9 = 49.0625

The height of the tree was approximately 49 feets

5 0

3 years ago

1/4 / 2 thank you and please help me on this

goldenfox [79]

Answer:

1/8

Step-by-step explanation:

Hope this helps. Pls give brainliest.

4 0

2 years ago

How do I write 9540000 in expanded form using exponents to show powers of 10

Ulleksa [173]

9.54*10^7 is the correct answer

3 0

2 years ago

To create a confidence interval from a bootstrap distribution using percentiles, we keep the middle values and chop off a certai

Nataliya [291]

Answer:

a

$\frac{\alpha }{2} = 2.5 \%$

b

$N = 25$

Step-by-step explanation:

From the question we are told that

The number of bootstrap samples is n = 1000

From the question we are told the confidence level is 95% , hence the level of significance is

$\alpha = (100 - 95 ) \%$

=> $\alpha = 0.05$

Generally the percentage of values that must be chopped off from each tail for a 95% confidence interval is mathematically evaluated as

$\frac{\alpha }{2} = \frac{0.05}{2} = 0.025 = 2.5 \%$

=> $\frac{\alpha }{2} = 2.5 \%$

Generally the number of the bootstrap sample that must be chopped off to produce a 95% confidence interval is

$N = 1000 * \frac{\alpha }{2}$

=> $N = 1000 * 0.025$

=> $N = 25$

4 0

3 years ago

1.solve for x 3x - 2 = 3 - 4x

Lilit [14]

Answer:

$x=\frac{5}{7}$

Step-by-step explanation:

$3x - 2 = 3 - 4x$

Add $2$ and $4x$ on both sides of the equation.

$3x - 2 +2+4x= 3 - 4x+2+4x$

$3x+4x=-4x+5+4x$

$7x=5$

Divide $7$ on both sides of the equation.

$\frac{7x}{7}=\frac{5}{7}$

$x=\frac{5}{7}$

6 0

2 years ago