Round to the nearest thousand -0.867796832

Mathematics

1 answer:

Dima020 [189]3 years ago

8 0

Answer:-0.868

Step-by-step explanation: Find the number that is in the thousdants place which is the first 7 and look one place to the right for the rounding diget which is the next 7, and if the last 7 is lower that 5 round down and if it is greater than 5 round up.

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A slide is 21 feet long. To get to the top of the slide, you use a vertical 9-foot high rung ladder. What is the distance, b, fr

Ilya [14]

For this you will use a^2+b^2=c^2

So 21 would be your c^2 and 9 your b^2 so now it'll look like this

A^2+9^2=21^2

A^2+81=441

next you move the 81 over so you subtract 81 from both sides and you're left with

A^2=360

after you get the square root so a=18.9

and rounded you're answer would be B. 19 feet

Hope this helped :)

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4 years ago

An escalator lifts people to the second floor of a building, 25 ft above the first floor. The escalator rises at a 30o angle. To

melamori03 [73]

Answer:

a person travel 50 ft from the bottom to the top of the escalator

Step-by-step explanation:

An escalator lifts people to the second floor of a building, 25 ft above the first floor. The escalator rises at a 30 degree angle

The escalator forms a right angle triangle

opposite to 30 degree angle is 25 feet. to find the distance from the bottom to the top of the escalator we find the hypotenuse

let x be the hypotenuse

$sin(theta)=\frac{opposite}{hypotenuse}$

$sin(30)=\frac{25}{x}\\x sin(30)= 25\\x=\frac{25}{sin(30)} \\x=50\\$

a person travel 50 ft from the bottom to the top of the escalator

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3 years ago

Using the defects method, which relationship represents the Law of Cosines if the measure of the included angle between the side

kirza4 [7]

Using the defects method, which relationship represents the Law of Cosines if the measure of the included angle between the sides a and b of ΔABC is less than 90°?

C) area of square c2 = area of square a2 + area of square b2 − area of defect1 − area of defect2

I'm really not familiar with this subject area but I have encountered this problem before and this answer was confirmed.

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3 years ago

Read 2 more answers

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s344n2d4d5 [400]

Answer:

The lines are perpendicular. Option B.

Explanation:

Equation of the Line

One of the characteristics of the line is its slope. It can be determined in two ways:

* From the equation y=mx+b, the m is the slope. The given equation is y=4x-5. Thus, the slope of this line is m=4.

* Suppose we know the line passes through points A(x1,y1) and B(x2,y2). The slope can be calculated with the equation: