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3 years ago

This is about exponents

Mathematics

1 answer:

bulgar [2K]3 years ago

6 0

Answer:

Step-by-step explanation:

Using the rules of exponents

$a^{m}$ × $a^{n}$ ⇔ $a^{(m+n)}$ and

$a^{0}$ = 1, then

$9^{x}$ × $9^{-x}$

= $9^{(x-x)}$

= $9^{0}$ = 1 → B

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You are sitting at the edge of the Grand Canyon admiring the view when you notice a tour group at the bottom of the canyon. You

ololo11 [35]

Answer:

7949.13 feet

Step-by-step explanation:

We are given that,

Angle of depression from the spot to the group = 39°

Height of Grand Canyon = 5000 feet.

So, we will get the following figure of a right triangle.

<em>As, 'in a right triangle, the angles and the sides can be written in trigonometric form'.</em>

We get, $\sin A=\frac{perpendicular}{hypotenuse}$

i.e. $\sin 39=\frac{5000}{x}$

i.e. $x=\frac{5000}{\sin 39}$

i.e. $x=\frac{5000}{0.629}$

i.e. x = 7949.13 feet

Thus, the line of sight distance is 7949.13 feet.

5 0

3 years ago

jasenka [17]

Answer:

Step-by-step explanation:

5 0

2 years ago

Read 2 more answers

the bottom of the swimming pool has an area of 48 meters. If the pool is 2 meters deep, what is the volume of the pool

KiRa [710]

Volume of a rectangular prism=Base*Height
Area is 48 meters squared and height is 2 meters
V=48*2
V=96 cubic meters

3 0

2 years ago

Jane moved from a house with 66 square feet of closet space to an apartment with 34.98 square feet of closet space. What is the

Kryger [21]

There is a 47% decrease in Jane's closet space.

Step-by-step explanation:

Old measurement of closet = 66 square feet

New measurement of closet = 34.98 square feet

Change = New value - Old value

Change = 34.98 - 66 = -31.02 square feet

The negative sign indicates the decrease.

Decrease percent = $\frac{Change}{Old\ value}*100$

$Decrease\ percent=\frac{31.02}{66}*100 = \frac{3102}{66}\\Decrease\ percent=47\%$

There is a 47% decrease in Jane's closet space.

Keywords: decrease, percentage

Learn more about percentages at:

#LearnwithBrainly

8 0

2 years ago

Plz help me with this!!!!!!!!

LenaWriter [7]

Answer: √y

<u>Step-by-step explanation:</u>

$\sqrt[6]{y^3}=y^{\frac{3}{6}}=y^{\frac{1}{2}}=\boxed{\sqrt y}$

4 0

3 years ago