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3 years ago

Show how u got the answer 309×42

Mathematics

1 answer:

luda_lava [24]3 years ago

4 0

3
1
390
x 42
-------
1282
1564
----------------

the answer would be 16380
Hope this helped :)

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Does anyone know the answer to the question below.

kompoz [17]

Answer:

B. 0.3

Step-by-step explanation:

sin²(t) + cos²(t) = 1

sin²(t) + 0.1² = 1

sin²(t) = 1 - 0.01 = 0.09

sin(t) = √(0.09) = 0.3

6 0

3 years ago

Please help me out with this

olga_2 [115]

Answer:

10.4 cm

Step-by-step explanation:

The volume (V) of a pyramid is calculated using

V = $\frac{1}{3}$ area of base × height (h)

area of square base = 6² = 36, thus

$\frac{1}{3}$ × 36h = 120

12h = 120 ( divide both sides by 12 )

h = 10 cm

To find the slant height (s) consider the right triangle from the vertex to the midpoint of the base and from the midpoint of base to the side.

That is a right triangle with hypotenuse s and legs 10(h) and 3 (midpoint of the base )

Using Pythagoras' identity then

s² = 10² + 3² = 100 + 9 = 109

Take the square root of both sides

s = $\sqrt{109}$ ≈ 10.4 cm

3 0

2 years ago

Greg goes fishing every day for a week. On the first day he catches seven fish and each

Oliga [24]

so first day and so on

7, 10, 13,....

as you can see it's an arithmetic progression

so sum for nth term= n/2 { 2a + (n-1) d}

it's the sum of the 7th term

7/2 { 7 ×2 + ( 7-1) 3}

7/2 × 32

7× 16

112 fishes

6 0

3 years ago

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Describe how the range of a data set can help describe its variability.

katovenus [111]

Answer:

The range is defined as the difference between the term with the highest value and the term with the lowest value. This statistic is used to measure the variability of a series of data because it provides information on how far apart the values of a tail of the distribution are from the values at the other end of the tail.

Imagine that you manufacture a type of spare part for cars that must have a measurement of 10 cm with a margin of error of 1 cm.

This is:

10 ± 1 cm

Then you expect your manufacturing process to produce pieces with identical dimensions, that is, with little variability.

If you randomly select a sample of n pieces and measure them, the variability is expected to be low, so that your process is of quality, then expect a low range preferably less than 1 cm.

{10, 10.1, 10.5, 9.8, 9,6, 10.2} Range= 10.5 - 9.6 = 0.9 cm <em> low variability</em>

But if you find that the range is up to 8 cm, this would mean that not all pieces measure around 10 cm, it means that the variability of the measurements is high.

{14, 12, 11, 8, 7, 11, 12, 15} Range = 15 - 7 = 8 cm <em>high variability </em>

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2 years ago

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Defined as bounded by two distinct end points that contain every point on the line between its end points.

Alja [10]

This would be the term referred to as a line segment. I hope this helps!

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3 years ago

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