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skad [1K]
3 years ago
7

thirty years later the washington monument was finally completed, and the angle of elevation to the top of the monument from the

same marker was 70o. to the nearest foot, how many feet were added to the phase 1 structure of the washington monument?
Mathematics
1 answer:
Damm [24]3 years ago
7 0

Answer:

Congress immediately tabled its expected contribution of $200,000 to the Society, effectively halting the appropriation. During its tenure, the Know-Nothing Society added only two courses of masonry, or four feet, to the monument using rejected masonry it found on site, increasing the height of the shaft to 156 feet

Step-by-step explanation:

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Which expressions are equivalent to 7 (negative three-fourths x minus 3)? Select two options.
polet [3.4K]

<em><u>The equivalent expressions are:</u></em>

7(-\frac{3}{4}x - 3) = (7 \times \frac{-3}{4}x) + (7 \times -3)\\\\7(-\frac{3}{4}x - 3) = \frac{-21x}{4} - 21

<em><u>Solution:</u></em>

<em><u>Given expression is:</u></em>

7(-\frac{3}{4}x - 3)

We have to find the equivalent expressions

By distributive property,

a(b + c) = ab + ac

Therefore,

7(-\frac{3}{4}x - 3) = (7 \times \frac{-3}{4}x) + (7 \times -3)\\\\7(-\frac{3}{4}x - 3) = \frac{-21x}{4} - 21

Thus equivalent expressions are found

7 0
4 years ago
Read 2 more answers
An asteroid has hit the Earth and created a huge crater. Engineers and scientists hove measured around the crater to be 79.5 mil
Stella [2.4K]
The measurement around the crater is the circumference. We need to find the radius so we can find the area fo the crater.
C= 2\pi r

Plug in values
79.5=2*(3.14)r

Multiply 2 and 3.14

79.5 = 6.28r

Divide both sides by 6.28

r approximately 12.66 miles

Area of a circle 

A= \pi r^2

Plug in values

A=(3.14)*12.66^2

Area = approximately 503.27 Sq Miles



6 0
3 years ago
It has been estimated that one million people are added to the world's population every 4.5 days. Use this rate to answer the fo
bekas [8.4K]

Answer:

81 million

Step-by-step explanation:

In one year there is 365 days, if you divide 365/4.5 the answer is 81.1. And every 4.5 days add 1 million people, then you multiply

81.1*1 000 000 = 81 100 000

approaching to the nearest million, 81 million of babies are added each year.

6 0
3 years ago
Can 4x^2-12x+9 be factored as (2x-3)(2x-3)
Bad White [126]

Answer:

Yes

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8 0
4 years ago
Read 2 more answers
-5(x-3+7x=35 what is x​
Cloud [144]

Answer:

x=-1/2

Step-by-step explanation:

-5(x-3+7x=35)=-5(x-3+7 <em>x </em>35=x)

(-5)x+(-5)(-3)+(-5) <em>x</em> 7x=35

-5x+5x<em>x </em>3-5 <em>x </em>7x=35

-40x+15=35

3 0
3 years ago
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