2 years ago

How ofteten Do chemists study the elements

Mathematics

1 answer:

sweet-ann [11.9K]2 years ago

7 0

Daily, there is always something new to be learning in the science world.

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To measure a stone face carved on the side of a mountain, two sightings 900 feet from the base of the mountain are taken. If th

olga nikolaevna [1]

Answer:

Height of the stone face = 66.29 feet

Step-by-step explanation:

Refer the given figure, here we need to find height of the stone face,

Height of the stone face = CD

CD = AD - AC

In ΔABC we have

$tan31=\frac{AC}{AB}\\\\tan31=\frac{AC}{900}\\\\AC=540.77feet$

In ΔABD we have

$tan34=\frac{AD}{AB}\\\\tan34=\frac{AD}{900}\\\\AD=607.06feet$

CD = AD - AC = 607.06 - 540.77 = 66.29 feet

Height of the stone face = CD = 66.29 feet

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3 years ago

Find the missing value if <br> f(x) = 2.<br> x=____<br> NEED HELP ASAP!!!

Yuri [45]

Answer:

i think its possibly 4

Step-by-step explanation:

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3 years ago

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Can someone please help me please

harina [27]

Answer:

If two angles are congruent, then they have the same measure.

Step-by-step explanation:

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3 years ago

How much dollars is in 14 quarters and 5 nickels

marishachu [46]

Answer:

$4.25

Step-by-step explanation:

4 quarters is 1 dollar

1 nickel is 5 cent

14 divided by 4 = 3.5

3.5 + 5 times 5 = $4.25

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3 years ago

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Given the geometric sequence where a1 = 3 and r = √2 find a9

Zigmanuir [339]

Answer:

$a_9=48$

Step-by-step explanation:

we are given

sequence is geometric

so, we can use nth term formula

$a_n=a_1(r)^{n-1}$

we have

$a_1=3$

$r=\sqrt{2}$

we have to find a9

so, we can plug n=9

we get

$a_9=3(\sqrt{2})^{9-1}$

$a_9=2^4\cdot \:3$

$a_9=48$

8 0

3 years ago