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puteri [66]
3 years ago
9

WILL MARK BRAINLIEST IF YOU GET ALL THREE!!!!!!! ANSWER AS MANY AS POSIBBLE 1. How can you determine whether an answer to a prob

lem should be an exact answer or an estimate?
2. What units of distance are in the English system? How are they related?


3. What units of distance are in the metric system? How are they related?
Mathematics
1 answer:
weeeeeb [17]3 years ago
3 0

Answer:

1) yes and no you cant tell most the time but using common sense you can tell.

2)Yards, feet, inches, pounds, quarts, and miles are all part of the English system of measures. they are related because they all deal with unit of distance

3), the distance of a road is how long the road is. In the metric system of measurement, the most common units of distance are millimeters, centimeters, meters, and kilometers. they are related because they also deal with distance in metrics.

Step-by-step explanation:

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Which number should come next in the series? 13, 57, 911, 1315, 1719?
DiKsa [7]

Answer:

2123

like 1+4=5

3+4=7

Step-by-step explanation:

All odd numbers beginning from one, in a series.

Also: Starting with 13, add 4 to each digit separately, and continue adding 4 to the result.

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3 years ago
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An item regularly priced at $80 is on sale for 20% off. There is a 3% sales tax. What is the sale price before sales tax?
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The sale price before the sale tax is $ 60 and the sales taxes will be $ 180
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Andrew is painting a wall on the side of his house. He has a 20 foot ladder wich makes a 79 degree angle with the ground. Standi
torisob [31]

Andrew can reach a maximum of 24.6ft high up the wall.

The right-angled triangle formed can be solved using the sine ratio. that is

sin(72^\circ})=\dfrac{h}{20}

where h is the distance from the foot of the wall to the tip of the ladder where it rests on the wall. Substituting, and solving for h, we get

0.9816=\dfrac{h}{20}\\\\h=20\times0.9816\\\\h=19.632ft

Since Andrew can reach an extra 5ft above the point where the ladder rests against the wall, the maximum height Andrew can paint is

(19.632+5)ft=24.632ft\\\\\approx24.6ft

Another solved word problem on trigonometry can be found here: brainly.com/question/12146092

3 0
3 years ago
The middle note C has a frequency of 262 hertz and can be modeled using a sine function with an amplitude of 1.5, where x is tim
MrRissso [65]

Answer:  f(x) = 1.5*sin(x*2*pi/0.0038s)

Step-by-step explanation:

A sine function is:

f(x) = A*sin(c*x + f)

Where A is the amplitude, we know that it is 1.5

c is a constant that depends on the frequency.

f is a phase.

As there is no mention of a phase, we can assume f = 0.

Then our function is:

f(x) = 1.5*sin(c*x)

now let's find the value of c.

We know that the frequency is 262hz.

Then the period can be calculated with the equation:

T = 1/f.

T = 1/262 Hz = 0.0038 seconds.

Now, the period of a sin function is 2*pi.

whit pi = 3.14159265358979.....

Then we have that:

sin(0) = sin(c*0.0038s)

sin(0) = sin(2*pi)

then:

c*0.0038s = 2*pi

c = 2*pi/0.0038s

Then the function is:

f(x) = 1.5*sin(x* 2*pi/0.0038s)

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