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FrozenT [24]
3 years ago
13

3 people work for 40 hours, 1 person allocate 20 hours the second person allocate 1/3 of the time what is left for the third per

son?
Mathematics
1 answer:
agasfer [191]3 years ago
4 0

Answer:

6.666...

Step-by-step explanation:

you add twenty to a third of forty and then you get 33.3333... and then you add 6.6666...

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___<br>H is the midpoint of IJ and IH = 0.75 find HJ<br>​
insens350 [35]
The answer is 1.5 bc 0.75 times 2 since it’s the midpoint
3 0
3 years ago
(4 pts) If a rock is thrown vertically upward from the surface of Mars with an initial velocity of 15m/sec
Yuliya22 [10]

Answer:

Step-by-step explanation:

I see you're in college math, so we'll solve this with calculus, since it's the easiest way anyway.

The position equation is

s(t)=-1.86t^2+15t  That equation will give us the height of the rock at ANY TIME during its travels. I could find the height at 2 seconds by plugging in a 2 for t; I could find the height at 12 seconds by plugging in a 12 for t, etc.

The first derivative of position is velocity:

v(t) = -3.72t + 15 and you stated that the rock will be at its max height when the velocity is 0, so we plug in a 0 for v(t):

0 = -3.72t + 15 and solve for t:\

-15 = -3.72t so

t = 4.03 seconds. This is how long it takes to get to its max height. Knowing that, we can plug 4.03 seconds into the position equation to find the height at 4.03 seconds:

s(4.03) = -1.86(4.03)² + 15(4.03) so

s(4.03) = 30.2 meters.

Calculus is amazing. Much easier than most methods to solve problems like this.

7 0
2 years ago
Yosin bought car for 4500
vovangra [49]

Answer:

10%

Step-by-step explanation:

450 is 10% of 4500

3 0
3 years ago
What is the best approximation for the area of this circle? Use 3.14 to approximate pi. 25.1 in² 50.2 in² 201.0 in² 803.8 in² Ci
Greeley [361]

Answer:

The best approximation is 201.0\ in^{2}

Step-by-step explanation:

we know that

The area of the circle is equal to

A=\pi r^{2}

In this problem we have

r=8\ in

\pi =3.14

substitute

A=(3.14)(8^{2})=201.0\ in^{2}

5 0
3 years ago
Read 2 more answers
Special triangles 2 back
AleksAgata [21]

Answer:


Step-by-step explanation:

10. From the given figure,

\frac{18}{y}=sin60^{0}

y=\frac{36}{\sqrt{3}}

11. From the given figure,

\frac{12}{y}=sin60^{0}

y=\frac{12{\times}2}{\sqrt{3}}=\frac{24}{\sqrt{3}}

and \frac{x}{y}=cos60^{0}

x=\frac{24}{\sqrt{3}{\times}2}=\frac{12}{\sqrt{3}}

12. The sides of an equilateral triangle has length=10 inches, therefore AB=BC=AC=10

Also, AD is the height of the given triangle,then BD=DC=5

From triangle ADC,

(AC)^{2}=(AD)^{2}+(DC)^{2}

100=(AD)^{2}+25

75=(AD)^{2}

AD=\sqrt{75}inches

Hence, height of the triangle is \sqrt{75}inches

13. Height of the ramp from the ground is 8ft.

therefore, let BC=x

\frac{8}{BC}=tan30^{0}

\frac{8}{x}=\frac{1}{\sqrt{3}}

x=8\sqrt{3}

14. Let BC=x and AB=y

then, \frac{x}{18}=cos30^{0}

x=18{\times}\frac{\sqrt{3}}{2}=9\sqrt{3}

and \frac{y}{x}=tan30^{0}

y=9

The perimeter of triangle is=Sum of all the sides=AB+BC+AC=9\sqrt{3}+9+18= 9\sqrt{3}+27=9(1.73)+27=42.57 inches

15. Let AB be the height of the tree, then

\frac{AB}{8}=tan30^{0}

AB=8{\times}\frac{1}{\sqrt{3}}=\frac{8}{1.73}=4.62m

16. According to question,

\frac{h}{24}=sin30^{0}

h=\frac{24}{2}=12ft

7 0
3 years ago
Read 2 more answers
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