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3 years ago

I need help with finding the area to this Triangle. This is Geometry by the way.

Mathematics

1 answer:

ycow [4]3 years ago

8 0

Answer:

9 sq. units

Step-by-step explanation:

dimensions of rectangle are (7-3),(8-3)

or 4,5

area of rectangle=4×5=20

area of bottom Δ=1/2×4×2=4

area of top Δ=1/2×3×3=9/2

area of right triangle=1/2 ×5×1=5/2

area of Δ HIJ=20-(4+9/2+5/2)

=20-(4+14/2)

=20-(4+7)

=9 sq. units.

or area of triangle =1/2

| 3 5 |

| 7 3 |

|6 8 |

|3 5 |

=1/2[(9-35)+(56-18)+(30-24)]

=1/2[-26+38+6]

=1/2[-26+44]

=1/2(18)

=9 sq. units.

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What is the volume of a hemisphere with a radius of 61.9 m, rounded to the nearest

ZanzabumX [31]

Answer:

The volume of the hemisphere is 496741.6 m³

Step-by-step explanation:

The volume of an sphere is given by:

$V_{s} = \frac{4\pi r^{3}}{3}$

In which $\pi = 3.14$ and r is the radius.

An hemisphere is half of an sphere, so it's volume is half the sphere's volume. So

$V_{h} = \frac{V_{s}}{2} = \frac{2\pi r^{3}}{3}$

In this question:

$r = 61.9$ . So

$V_{h} = \frac{2\pi (61.9)^{3}}{3} = 496741.6$

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andrew11 [14]

Answer:

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Step-by-step explanation:

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3 years ago

During the first four months of the year, Jack earned $1270, $1150, $870 and $1450 If Jack must have an average salary of at lea

tia_tia [17]

Answer:

1010

Step-by-step explanation:

There are a whole class of questions that rely on the method to this one.

First add up what you know

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Now add on the 5th month (which you don't know. Call it x)

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Solution

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5*(4740 + x) / 5 = 1150 * 5

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Subtract 4740 from both sides

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Which seems kind of low, but that's what the numbers come to.

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Step-by-step explanation:

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Hope this helps, and if not, I'm sorry!

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