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3 years ago

5) 36% of 68.1 is what?

Mathematics

2 answers:

Salsk061 [2.6K]3 years ago

6 0

Answer:

I'm pretty sure it's 24.516

Kay [80]3 years ago

6 0

Answer/Step-by-step explanation:

36% of 68.1 is 24.516.

1. To find a percentage of a number, turn the percentage into a decimal that is represented out of 100% where 1 is equal to 100%.

36% is represented as 0.36.

2. Now, multiply that decimal by the number.

68.1 x 0.36 = 24.516

This leaves us with the answer.

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The height of a small rock falling from the top of a 124-ft-tall building with an initial downward velocity of –30 ft/sec is mod

Contact [7]

Answer:

Option 3.

Step-by-step explanation:

The given function is

$h(t)=-16t^2-30t+124$

where, h(t) is the height of a small rock falling from the top of a 124-ft-tall building and t is the time in seconds.

It is a downward parabola.

Equate the function equal to 0, to find the time at which the rock touch the ground.

$-16t^2-30t+124=0$

If $ax^2+bx+c=0$ , the according to the quadratic formula

$x=\dfrac{-b\pm \sqrt{b^2-4ac}}{2a}$

Using quadratic formula, we get

$t=\dfrac{-(-30)\pm \sqrt{(-30)^2-4(124)(-16)}}{2(-16)}$

$t=\dfrac{30+\sqrt{(-30)^2-4(124)(-16)}}{2(-16)},\dfrac{30-\sqrt{(-30)^2-4(124)(-16)}}{2(-16)}$

$t=-3.875, 2$

Time cannot be negative. So, the rock remain in the air in the interval 0 < t < 2.

Therefore, the correct option is 3.

6 0

3 years ago

Can someone plz help me

bixtya [17]

Answer:

Step-by-step explanation:

pattern is multiplying by -5.

-7,500*-5 = 37,500

Have a nice day! :-)

5 0

3 years ago

How do you write 7 a mixed number in the simplest form

Aleonysh [2.5K]

What does this even mean?

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3 years ago

Simplify: (8x2)+(−11x2+2x+1)

denpristay [2]

Answer:

−3x^2+2x+1

Step-by-step explanation:

combine like terms

8x^2−11x^2

then just add the rest if theres no more like terms

hope this helps :/

3 0

3 years ago

-4x 25 = 13 solve for x

sammy [17]

- 4x + 25 = 13
4x = 12
x = 3

3 0

3 years ago