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3 years ago

PLZZZZ HELPPPPPPP!!!!

Mathematics

1 answer:

Vladimir79 [104]3 years ago

3 0

Answer: The height of the building is 50.75 feet.

Step-by-step explanation:

The ratio between the height of the object and the casted shadow must be equal for all the objects, as the angle at which the source if light impacts them is the same.

For the person, we know that it is 5.8ft tall, and the shadow is 3.2ft long.

The ratio will be: 5.8ft/3.2ft = 1.8125

Now, if H is the height of the building, and the shadow that the building casts is 28ft, we must have:

H/28ft = 1.8125

Now we can solve this for H.

H = 1.8125*28ft = 50.75 ft

Then the height of the building is 50.75 feet.

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3 years ago

Which function has two x-intercepts, one at (0,0) and one at (4,0)?

Tcecarenko [31]

Answer:

$f(x)=x(x-4)$

Step-by-step explanation:

Given: Function has two x-intercepts, one at (0,0) and one at (4,0)

To choose: the correct option

Solution:

x-intercepts of are the points whose x-coordinate is 0.

Consider $f(x)=x(x-4)$

Put $x=0$

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3 years ago

What is the fraction -176/125 simplified

Mazyrski [523]

Answer:

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3 years ago

Multiply the matrices. (Please help!)

Ainat [17]

9514 1404 393

Answer:

$\left[\begin{array}{cc}12&1\\-4&1\\-11&28\end{array}\right]$

Step-by-step explanation:

The element at row i column j in the product is the dot-product of row i of the first matrix and column j of the second matrix. For example, row 2 column 1 of the product is ...

(row 2) · (column 1)

[3, -2, 4] · [2, 7, 1] = (3)(2) +(-2)(7) +(4)(1) = 6 -14 +4 = -4

The attachment shows the complete product matrix. It is convenient to let a spreadsheet or graphing calculator do the tedious repetitive arithmetic.

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3 years ago

a cylindrical salt shaker has a radius of 2 cm and a height of 7 cm. It comes in a box that is 8 cm tall and has a square base w

inysia [295]

We know that

[volume of a cylindrical salt shaker]=pi*r²*h
r=2 cm
h=7 cm
[volume of a cylindrical salt shaker]=pi*2²*7---> 87.92 cm³

[volume of the box]=b²*h
b=4 cm
h=8 cm

[volume of the box]=4²*8---> 128 cm³

[the volume of air in the box outside the salt shaker]=128-87.92--> 40.08 cm³

the answer is
the <span>volume of air in the box outside the salt shaker is 40.08 cm</span>³

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3 years ago